<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>2.0</version>
  <creation_date>2012-05-31 09:55:42 -0600</creation_date>
  <update_date>2015-09-13 12:56:05 -0600</update_date>
  <accession>ECMDB00034</accession>
  <m2m_id>M2MDB000010</m2m_id>
  <name>Adenine</name>
  <description>Adenine is a purine base. Adenine is found in both DNA and RNA. Adenine is a fundamental component of adenine nucleotides. Adenine forms adenosine, a nucleoside, when attached to ribose, and deoxyadenosine when attached to deoxyribose; it forms adenosine triphosphate (ATP), a nucleotide, when three phosphate groups are added to adenosine. Adenosine triphosphate is used in cellular metabolism as one of the basic methods of transferring chemical energy between chemical reactions.</description>
  <synonyms>
    <synonym>1,6-Dihydro-6-iminopurine</synonym>
    <synonym>1H-Purin-6-amine</synonym>
    <synonym>1H-Purine-6-amine</synonym>
    <synonym>3,6-Dihydro-6-iminopurine</synonym>
    <synonym>6-Amino-1H-purine</synonym>
    <synonym>6-Amino-3H-purine</synonym>
    <synonym>6-Amino-7H-purine</synonym>
    <synonym>6-Amino-9H-purine</synonym>
    <synonym>6-Amino-Purine</synonym>
    <synonym>6-Aminopurine</synonym>
    <synonym>9H-Purin-6-amine</synonym>
    <synonym>9H-Purin-6-yl-amin</synonym>
    <synonym>9H-Purin-6-ylamine</synonym>
    <synonym>9H-Purine-6-amine</synonym>
    <synonym>Ade</synonym>
    <synonym>Adenin</synonym>
    <synonym>Adenine</synonym>
    <synonym>Adeninimine</synonym>
    <synonym>Vitamin B4</synonym>
  </synonyms>
  <chemical_formula>C5H5N5</chemical_formula>
  <average_molecular_weight>135.1267</average_molecular_weight>
  <monisotopic_moleculate_weight>135.054495185</monisotopic_moleculate_weight>
  <iupac_name>7H-purin-6-amine</iupac_name>
  <traditional_iupac>vitamin B4</traditional_iupac>
  <cas_registry_number>73-24-5</cas_registry_number>
  <smiles>NC1=C2NC=NC2=NC=N1</smiles>
  <inchi>InChI=1S/C5H5N5/c6-4-3-5(9-1-7-3)10-2-8-4/h1-2H,(H3,6,7,8,9,10)</inchi>
  <inchikey>GFFGJBXGBJISGV-UHFFFAOYSA-N</inchikey>
  <state>Solid</state>
  <cellular_locations>
    <cellular_location>Cytosol</cellular_location>
    <cellular_location>Extra-organism</cellular_location>
    <cellular_location>Periplasm</cellular_location>
  </cellular_locations>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>-0.38</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-1.07</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>1.15e+01 g/l</value>
      <source>ALOGPS</source>
    </property>
  </predicted_properties>
  <experimental_properties>
    <property>
      <kind>melting_point</kind>
      <value>360 oC</value>
    </property>
  </experimental_properties>
  <property>
    <kind>logp</kind>
    <value>-0.57</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_acidic</kind>
    <value>10.29</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_basic</kind>
    <value>3.64</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>iupac</kind>
    <value>7H-purin-6-amine</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>average_mass</kind>
    <value>135.1267</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>mono_mass</kind>
    <value>135.054495185</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>smiles</kind>
    <value>NC1=C2NC=NC2=NC=N1</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formula</kind>
    <value>C5H5N5</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchi</kind>
    <value>InChI=1S/C5H5N5/c6-4-3-5(9-1-7-3)10-2-8-4/h1-2H,(H3,6,7,8,9,10)</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchikey</kind>
    <value>GFFGJBXGBJISGV-UHFFFAOYSA-N</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polar_surface_area</kind>
    <value>80.48</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>refractivity</kind>
    <value>38.22</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polarizability</kind>
    <value>12.29</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>rotatable_bond_count</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>acceptor_count</kind>
    <value>4</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>donor_count</kind>
    <value>2</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>physiological_charge</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formal_charge</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <pathways>
    <pathway>
      <name>Purine metabolism</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>ec00230</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>Cysteine and methionine metabolism</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>ec00270</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>Pantothenate and CoA biosynthesis</name>
      <description>The CoA biosynthesis requires compounds from two other pathways: aspartate metabolism and valine biosynthesis. It requires a Beta-Alanine and R-pantoate.
The compound (R)-pantoate is generated in two reactions, as shown by the interaction of alpha-ketoisovaleric acid, 5,10 methylene-THF and water through a 3-methyl-2-oxobutanoate hydroxymethyltransferase resulting in a tetrahydrofolic acid and a 2-dehydropantoate. This compound interacts with hydrogen through a NADPH driven acetohydroxy acid isomeroreductase resulting in the release of NADP and R-pantoate.
On the other hand L-aspartic acid interacts with a hydrogen ion and gets decarboxylated through an Aspartate 1- decarboxylase resulting in a carbon dioxide and a Beta-alanine.
Beta-alanine and R-pantoate interact with an ATP driven pantothenate synthetase resulting in pyrophosphate, AMP, hydrogen ion and pantothenic acid.
Pantothenic acid is phosphorylated through a ATP-driven pantothenate kinase resulting in a ADP, a hydrogen ion and D-4'-Phosphopantothenate. This compound interacts with a CTP and a L-cysteine resulting in a fused 4'-phosphopantothenoylcysteine decarboxylase and phosphopantothenoylcysteine synthetase resulting in a hydrogen ion, a pyrophosphate, a CMP and 4-phosphopantothenoylcysteine. 
The latter compound interacts with a hydrogen ion through a fused 4'-phosphopantothenoylcysteine decarboxylase and phosphopantothenoylcysteine synthetase resulting in a carbon dioxide release and a  4-phosphopantetheine. This compound interacts with an ATP, hydrogen ion and an phosphopantetheine adenylyltransferase resulting in a release of pyrophosphate, and dephospho-CoA.
Dephospho-CoA reacts with an ATP driven dephospho-CoA kinase resulting in a ADP , a hydrogen ion and a Coenzyme A.

 . The latter is converted into (R)-4'-phosphopantothenate is two steps, involving a β-alanine ligase and a kinase. In most organsims the ligase acts before the kinase (EC 6.3.2.1, pantoate—β-alanine ligase (AMP-forming) followed by EC 2.7.1.33, pantothenate kinase, as described in phosphopantothenate biosynthesis I and phosphopantothenate biosynthesis II. However, in archaea the order is reversed, and EC 2.7.1.169, pantoate kinase acts before EC 6.3.2.36, 4-phosphopantoate—β-alanine ligase, as described in phosphopantothenate biosynthesis III.

The kinases are feedback inhibited by CoA itself, accounting for the primary regulatory mechanism of CoA biosynthesis. The addition of L-cysteine to (R)-4'-phosphopantothenate, resulting in the formation of R-4'-phosphopantothenoyl-L-cysteine (PPC), is followed by decarboxylation of PPC to 4'-phosphopantetheine. The ultimate reaction is catalyzed by EC 2.7.1.24, dephospho-CoA kinase, which converts 4'-phosphopantetheine to CoA. All enzymes of this pathway are essential for growth.

The reactions in the biosynthetic route towards CoA are identical in most organisms, although there are differences in the functionality of the involved enzymes. In plants every step is catalyzed by single monofunctional enzymes, whereas in bacteria and mammals bifunctional enzymes are often employed [Rubio06].</description>
      <pathwhiz_id>PW000828</pathwhiz_id>
      <kegg_map_id>ec00770</kegg_map_id>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>Phosphonate and phosphinate metabolism</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>ec00440</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>Two-component system</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>ec02020</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>Metabolic pathways</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>eco01100</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>Collection of Reactions without pathways</name>
      <description/>
      <pathwhiz_id>PW001891</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>Quorum Sensing</name>
      <description>Bacterial Autoinducer 2 (AI-2) mediates the quorum sensing 2 system. AI-2 is catalyzed by the luxS enzyme. This enzyme is found in E.coli and S.typhimurium. 
In E. coli and most pathogenic bacteria that form AI-2 are spontaneous transformations that include cyclization to (2R,4S)-2-methyl-2,4-dihydroxydihydrofuran-3-one and hydration to the final autoinducer (2R,4S)-2-methyl-2,3,3,4-tetrahydroxytetrahydrofuran. This product is released from the cell through the AI-2 transporter (tqsA).
As the level of AI-2 increases, other cells detect it and import it through the autoinducer-2 ABC transporter (lsrACDB). AI-2 is then degraded in the cells by phosphorylating the AI-2 which is then isomerized to P-HPD which follows by the transfer of and acetyl group to coenzyme A and releases dihydroxyacetone phosphate</description>
      <pathwhiz_id>PW000836</pathwhiz_id>
      <kegg_map_id/>
      <subject>Signaling</subject>
    </pathway>
    <pathway>
      <name>S-adenosyl-L-methionine biosynthesis</name>
      <description>S-adenosyl-L-methionine biosynthesis(SAM) is synthesized in the cytosol of the cell from L-methionine and ATP. This reaction is catalyzed by methionine adenosyltransferase. L methione is taken up from the environment through a complex reaction coupled transport and then proceeds too synthesize the s adenosylmethionine through a adenosylmethionine synthase. The S-adenosylmethionine then interacts with a hydrogen ion through a adenosylmethionine decarboxylase resulting in a carbon dioxide and a S-adenosyl 3-methioninamine.This compound interacts with a putrescine through a spermidine synthase resulting in a spermidine, a hydrogen ion and a S-methyl-5'-thioadenosine. The latter compound is degraded by interacting with a water molecule through a 5' methylthioadenosine nucleosidase resulting in a adenine and a S-methylthioribose which is then release into the environment</description>
      <pathwhiz_id>PW000837</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>preQ0 metabolism</name>
      <description>PreQ0 or 7-cyano-7-carbaguanine is biosynthesized by degrading GTP.
GTP first interacts with water through a GTP cyclohydrolase resulting in the release of a formate, a hydrogen ion and a 7,8-dihydroneopterin 3'-triphosphate. The latter compound then interacts with water through a 6-carboxy-5,6,7,8-tetrahydropterin synthase resulting in a acetaldehyde, triphosphate, 2 hydrogen ion and 6-carboxy-5,6,7,8-tetrahydropterin. The latter compound then reacts spontaneously with a hydrogen ion resulting in the release of a ammonium molecule and a 7-carboxy-7-deazaguanine. This compound then interacts with ATP and ammonium through 7-cyano-7-deazaguanine synthase resulting in the release of water, phosphate, ADP, hydrogen ion and a 7-cyano-7-carbaguanine. 
The degradation of 7-cyano-7-deazaguanine can lead to produce a preQ1 or a queuine by reacting with 3 hydrogen ions and 2 NADPH through a 7-cyano-7-deazaguanine reductase. PreQ1 then interacts with a guanine 34 in tRNA through a tRNA-guanine transglycosylase resulting in a release of a guanine and a 7-aminomethyl-7-deazaguanosine 34 in tRNA. This nucleic acid then interacts with SAM through a S-adenosylmethionine tRNA ribosyltransferase-isomerase resulting in a release of a hydrogen ion, L-methionine, adenine and an epoxyqueuosine</description>
      <pathwhiz_id>PW001893</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>Citrate lyase activation</name>
      <description>The citrate lyase activation starts with a 3-dephospho-CoA  reacting with ATP and a hydrogen ion through a triphosphoribosyl-dephospho-CoA synthase resulting in a adenine and a 2'-(5'-triphospho-alpha-D-ribosyl)-3'-dephospho-CoA. The latter compound in turn reacts with with a citrate lyase acyl-carrier protein through a apo-citrate lyase phosphoribosyl-dephospho-CoA transferase resulting in the release of a pyrophosphate and a hydrogen ion and a holo citrate lyase acyl-carrier protein.This  protein complex can either react with a hydrogen ion and a acetate resulting in the release of a water and an acetyl-holo citrate lyase acyl-carrier protein.
The holo acyl-carrier protein creacts with an ATP and an acetate through a citrate lyase synthase resulting in the release of an AMP, a pyrophosphate and an acetyl-holo citrate lyase acyl-ccarrier protein. 
The holo citrate lyase acyl-carrier protein can also interact with an S-acetyl phosphopantethiene resulting in the release of a  4-phosphopantethiene and an acetyl-holo citrate lyase acyl-carrier protein.</description>
      <pathwhiz_id>PW002075</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>adenine and adenosine salvage I</name>
      <description>The salvage of adenine begins with adenine being transporter into the cytosol through a adeP hydrogen symporter. Once in the cytosol adenine is degraded by reacting with a ribose-1-phosphate through an adenosine phosphorylase resulting in the release of a phosphate and adenosine. Adenosine is then deaminated by reacting with water, a hydrogen ion and an adenosine deaminase resulting in the release of an ammonium and a inosine . Inosine then reacts with a phosphate through a inosine phosphorylase resulting in the release of a ribose 1-phosphate and a hypoxanthine. Hypoxanthine reacts with a PRPP through a hypoxanthine phosphoribosyltransferase resulting in the release of a pyrophosphate and a IMP molecule.</description>
      <pathwhiz_id>PW002069</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>adenine and adenosine salvage II</name>
      <description>The salvage of adenine begins with adenine being transporter into the cytosol through a adeP hydrogen symporter. Once in the cytosol adenine is degraded by reacting with a ribose-1-phosphate through an adenosine phosphorylase resulting in the release of a phosphate and adenosine. Adenosine is then deaminated by reacting with water, a hydrogen ion and an adenosine deaminase resulting in the release of an ammonium and a inosine . Inosine can then be phosphorylated through an ATP driven inosine kinase resulting in the release of an ADP, a hydrogen ion and a IMP</description>
      <pathwhiz_id>PW002071</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>adenine and adenosine salvage III</name>
      <description>Adenosine is first incorporated into the cytosol through either a nupG or a nupC transporter. Once in the cytosol, adenosine is degraded into adenine by reacting with a water and a adenosine nucleosidase, releasing a D-ribofuranose and a adenine. The adenine then reacts with a PRPP through a adenine phosphoribosyltransferase resulting in the release of a pyrophosphate and an AMP</description>
      <pathwhiz_id>PW002072</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>methylphosphonate degradation I</name>
      <description>The pathway of methylphosphonate degradation starts with methylphosphonate being degrade by an ATP driven methylphosphonate degradation complex resulting in a alpha-D-ribose-1-methylphosphonate-5-triphosphate. This compound in turn is degraded by a water driven RPnTP hydrolase resulting in the release of a hydrogen ion, a pyrophosphate and a alpha-Dribose-1-methylphosphonate 5-phosphate. The latter compound is then involved with a carbon-phosphorous lyase resulting in the release of a methane and a 5-phospho-alpha-D-ribose 1,2-cyclic phosphate. This compound in turn gets degraded by a water driven 5-phospho-alpha-D-ribosyl 1,2-cyclic phosphate phosphodiesterase resulting in the release of a hydrogen ion and a alpha-D-ribose 1,5-biphosphate.</description>
      <pathwhiz_id>PW002065</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>purine deoxyribonucleosides degradation</name>
      <description/>
      <pathwhiz_id>PW002077</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>purine ribonucleosides degradation</name>
      <description>Purine ribonucleoside degradation leads to the production of alpha-D-ribose-1-phosphate.
Xanthosine is transported into the cytosol through a xapB. Once in the cytosol xanthosine interacts with phosphate through a xanthosine phosphorylase resulting in the release of a xanthine and a alpha-D-ribose-1-phosphate.
Adenosine is transported through a nupC or a nupG transporter, once inside the cytosol it can either react with a phosphate through a adenosine phosphorylase resultin in the release of a adenine and an alpha-D-ribose-1-phosphate. Adenosine reacts with water and hydrogen ion through a adenosine deaminase resulting in the release of ammonium and inosine. Inosine reacts with phosphate through a inosine phosphorylase resulting in the release of a hypoxanthine and an alpha-D-ribose-1-phosphate.
Guanosine reacts with a phosphate through a guanosine phosphorylase resulting in the release of a guanine and a alpha-D-ribose-1-phosphate.</description>
      <pathwhiz_id>PW002076</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>S-adenosyl-L-methionine cycle</name>
      <description>The S-adenosyl-L-methionine cycle starts with S-adenosyl-L-methionine reacting with (a demethylated methyl donor ) dimethylglycine resulting in the release of a hydrogen ion, a betain (a methylated methyl donor) and a S-adenosyl-L-homocysteine. The s-adenosyl-L-homocysteine reacts with a water molecule through a S-adenosylhomocysteine nucleosidase resulting in the release of a adenine and a ribosyl-L-homocysteine. This compound in turn reacts with a s-ribosylhomocysteine lyase resulting in the release of a l-homocysteine and a autoinducer 2. The L-homocysteine reacts with a   N5-methyl-tetrahydropteroyl tri-L-glutamate through a methionine synthase resulting in the release of a tetrahydropteroyl tri-L-glutamate and a methione. The methionine in turn reacts with a water molecule and ATP molecule through a methionine adenosyltransferase resulting in the release of a diphosphate, a phosphate  and a s-adenosyl-L-methionine.</description>
      <pathwhiz_id>PW002080</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>Spermidine biosynthesis and metabolism</name>
      <description>Spermidine metabolism starts with S-adenosyl-L-methionine reacting with a hydrogen ion through a adenosylmethionine decarboxylase resulting in the release of a carbon dioxide and a S-adenosyl 3-(methylthio)propylamine.  The later compound in turn reacts with putrescine  resulting in the release of a hydrogen ion, a spermidine and a S-methyl-5'-thioadenosine. S-methyl-5'-thioadenosine in turn reacts with a water molecule through a 5-methylthioadenosine nucleosidase resulting in the release of a adenine and a S-methyl-5-thio-D-ribose which in in turn is released into the environment. </description>
      <pathwhiz_id>PW002085</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>methylphosphonate degradation</name>
      <ecocyc_pathway_id>PWY0-1533</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>adenine and adenosine salvage III</name>
      <ecocyc_pathway_id>PWY-6609</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>adenine and adenosine salvage V</name>
      <ecocyc_pathway_id>PWY-6611</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>purine ribonucleosides degradation to ribose-1-phosphate</name>
      <ecocyc_pathway_id>PWY0-1296</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>adenine and adenosine salvage II</name>
      <ecocyc_pathway_id>PWY-6605</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>purine deoxyribonucleosides degradation</name>
      <ecocyc_pathway_id>PWY0-1297</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>queuosine biosynthesis</name>
      <ecocyc_pathway_id>PWY-6700</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>2'-(5'-phosphoribosyl)-3'-dephospho-CoA biosynthesis I (citrate lyase)</name>
      <ecocyc_pathway_id>P2-PWY</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>&lt;i&gt;S&lt;/i&gt;-adenosyl-L-methionine cycle I</name>
      <ecocyc_pathway_id>PWY-6151</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>autoinducer AI-2 biosynthesis I</name>
      <ecocyc_pathway_id>PWY-6153</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>adenosine nucleotides degradation III</name>
      <ecocyc_pathway_id>PWY-6617</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>&lt;i&gt;S&lt;/i&gt;-methyl-5'-thioadenosine degradation IV</name>
      <ecocyc_pathway_id>PWY0-1391</ecocyc_pathway_id>
    </pathway>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>288</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>289</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>290</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1580</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1634</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>1639</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>3464</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30172</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30472</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30821</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30964</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30965</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>30966</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>32043</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>155635</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::EiMs</type>
      <spectrum_id>411</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>1043</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>2599</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>3302</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5412</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5413</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5414</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5415</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5416</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5417</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5418</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5419</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5420</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5421</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5422</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5423</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5424</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5425</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5426</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5427</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5428</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5429</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5430</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5431</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>57</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>58</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>59</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2618</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2619</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2620</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2621</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2622</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2626</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2627</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2628</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>2629</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6980</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6981</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>6982</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>13652</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>13653</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>13654</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>438799</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>439015</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>439016</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>440031</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>440100</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>447775</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>447776</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrTwoD</type>
      <spectrum_id>938</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrTwoD</type>
      <spectrum_id>1101</spectrum_id>
    </spectrum>
  </spectra>
  <hmdb_id>HMDB00034</hmdb_id>
  <pubchem_compound_id>190</pubchem_compound_id>
  <chemspider_id>185</chemspider_id>
  <kegg_id>C00147</kegg_id>
  <chebi_id>16708</chebi_id>
  <biocyc_id>ADENINE</biocyc_id>
  <het_id>ANE</het_id>
  <wikipidia>Adenine</wikipidia>
  <foodb_id/>
  <general_references>
    <reference>
      <reference_text>Keseler, I. M., Collado-Vides, J., Santos-Zavaleta, A., Peralta-Gil, M., Gama-Castro, S., Muniz-Rascado, L., Bonavides-Martinez, C., Paley, S., Krummenacker, M., Altman, T., Kaipa, P., Spaulding, A., Pacheco, J., Latendresse, M., Fulcher, C., Sarker, M., Shearer, A. G., Mackie, A., Paulsen, I., Gunsalus, R. P., Karp, P. D. (2011). "EcoCyc: a comprehensive database of Escherichia coli biology." Nucleic Acids Res 39:D583-D590.</reference_text>
      <pubmed_id>21097882</pubmed_id>
    </reference>
    <reference>
      <reference_text>Kanehisa, M., Goto, S., Sato, Y., Furumichi, M., Tanabe, M. (2012). "KEGG for integration and interpretation of large-scale molecular data sets." Nucleic Acids Res 40:D109-D114.</reference_text>
      <pubmed_id>22080510</pubmed_id>
    </reference>
    <reference>
      <reference_text>Vijayendran, C., Barsch, A., Friehs, K., Niehaus, K., Becker, A., Flaschel, E. (2008). "Perceiving molecular evolution processes in Escherichia coli by comprehensive metabolite and gene expression profiling." Genome Biol 9:R72.</reference_text>
      <pubmed_id>18402659</pubmed_id>
    </reference>
    <reference>
      <reference_text>van der Werf, M. J., Overkamp, K. M., Muilwijk, B., Coulier, L., Hankemeier, T. (2007). "Microbial metabolomics: toward a platform with full metabolome coverage." Anal Biochem 370:17-25.</reference_text>
      <pubmed_id>17765195</pubmed_id>
    </reference>
    <reference>
      <reference_text>Winder, C. L., Dunn, W. B., Schuler, S., Broadhurst, D., Jarvis, R., Stephens, G. M., Goodacre, R. (2008). "Global metabolic profiling of Escherichia coli cultures: an evaluation of methods for quenching and extraction of intracellular metabolites." Anal Chem 80:2939-2948.</reference_text>
      <pubmed_id>18331064</pubmed_id>
    </reference>
    <reference>
      <reference_text>Bennett, B. D., Kimball, E. H., Gao, M., Osterhout, R., Van Dien, S. J., Rabinowitz, J. D. (2009). "Absolute metabolite concentrations and implied enzyme active site occupancy in Escherichia coli." Nat Chem Biol 5:593-599.</reference_text>
      <pubmed_id>19561621</pubmed_id>
    </reference>
    <reference>
      <reference_text>Ishii, N., Nakahigashi, K., Baba, T., Robert, M., Soga, T., Kanai, A., Hirasawa, T., Naba, M., Hirai, K., Hoque, A., Ho, P. Y., Kakazu, Y., Sugawara, K., Igarashi, S., Harada, S., Masuda, T., Sugiyama, N., Togashi, T., Hasegawa, M., Takai, Y., Yugi, K., Arakawa, K., Iwata, N., Toya, Y., Nakayama, Y., Nishioka, T., Shimizu, K., Mori, H., Tomita, M. (2007). "Multiple high-throughput analyses monitor the response of E. coli to perturbations." Science 316:593-597.</reference_text>
      <pubmed_id>17379776</pubmed_id>
    </reference>
    <reference>
      <reference_text>Sreekumar A, Poisson LM, Rajendiran TM, Khan AP, Cao Q, Yu J, Laxman B, Mehra R, Lonigro RJ, Li Y, Nyati MK, Ahsan A, Kalyana-Sundaram S, Han B, Cao X, Byun J, Omenn GS, Ghosh D, Pennathur S, Alexander DC, Berger A, Shuster JR, Wei JT, Varambally S, Beecher C, Chinnaiyan AM: Metabolomic profiles delineate potential role for sarcosine in prostate cancer progression. Nature. 2009 Feb 12;457(7231):910-4.</reference_text>
      <pubmed_id>19212411</pubmed_id>
    </reference>
    <reference>
      <reference_text>Eells JT, Spector R: Purine and pyrimidine base and nucleoside concentrations in human cerebrospinal fluid and plasma. Neurochem Res. 1983 Nov;8(11):1451-7.</reference_text>
      <pubmed_id>6656991</pubmed_id>
    </reference>
    <reference>
      <reference_text>Di Pietro V, Perruzza I, Amorini AM, Balducci A, Ceccarelli L, Lazzarino G, Barsotti P, Giardina B, Tavazzi B: Clinical, biochemical and molecular diagnosis of a compound homozygote for the 254 bp deletion-8 bp insertion of the APRT gene suffering from severe renal failure. Clin Biochem. 2006 Oct 19;.</reference_text>
      <pubmed_id>17126311</pubmed_id>
    </reference>
    <reference>
      <reference_text>Moriyama H, Iizuka T, Nagai M, Hoshi K: Adenine, an inhibitor of platelet aggregation, from the leaves of Cassia alata. Biol Pharm Bull. 2003 Sep;26(9):1361-4.</reference_text>
      <pubmed_id>12951489</pubmed_id>
    </reference>
    <reference>
      <reference_text>Liu Y, Xu G, Xu C, Garcia L, Lin CC, Yeh LT: Ultra sensitive method for the determination of 9-(2-phosphonylmethoxyethyl)adenine in human serum by liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci. 2004 Apr 25;803(2):293-8.</reference_text>
      <pubmed_id>15063338</pubmed_id>
    </reference>
    <reference>
      <reference_text>Terry KL, De Vivo I, Titus-Ernstoff L, Shih MC, Cramer DW: Androgen receptor cytosine, adenine, guanine repeats, and haplotypes in relation to ovarian cancer risk. Cancer Res. 2005 Jul 1;65(13):5974-81.</reference_text>
      <pubmed_id>15994977</pubmed_id>
    </reference>
    <reference>
      <reference_text>Steiner MC, Evans R, Deacon SJ, Singh SJ, Patel P, Fox J, Greenhaff PL, Morgan MD: Adenine nucleotide loss in the skeletal muscles during exercise in chronic obstructive pulmonary disease. Thorax. 2005 Nov;60(11):932-6. Epub 2005 Jul 29.</reference_text>
      <pubmed_id>16055624</pubmed_id>
    </reference>
    <reference>
      <reference_text>Whitehead JW, Lee GP, Gharagozloo P, Hofer P, Gehrig A, Wintergerst P, Smyth D, McCoull W, Hachicha M, Patel A, Kyle DJ: 8-Substituted analogues of 3-(3-cyclopentyloxy-4-methoxy-benzyl)-8-isopropyl-adenine: highly potent and selective PDE4 inhibitors. J Med Chem. 2005 Feb 24;48(4):1237-43.</reference_text>
      <pubmed_id>15715490</pubmed_id>
    </reference>
    <reference>
      <reference_text>Reimers HJ, Packham MA, Mustard JF: Labeling of the releasable adenine nucleotides of washed human platelets.  Blood. 1977 Jan;49(1):89-99.</reference_text>
      <pubmed_id>401462</pubmed_id>
    </reference>
    <reference>
      <reference_text>Hartmann S, Okun JG, Schmidt C, Langhans CD, Garbade SF, Burgard P, Haas D, Sass JO, Nyhan WL, Hoffmann GF: Comprehensive detection of disorders of purine and pyrimidine metabolism by HPLC with electrospray ionization tandem mass spectrometry. Clin Chem. 2006 Jun;52(6):1127-37. Epub 2006 Apr 13.</reference_text>
      <pubmed_id>16613999</pubmed_id>
    </reference>
    <reference>
      <reference_text>Ohdoi C, Nyhan WL, Kuhara T: Chemical diagnosis of Lesch-Nyhan syndrome using gas chromatography-mass spectrometry detection. J Chromatogr B Analyt Technol Biomed Life Sci. 2003 Jul 15;792(1):123-30.</reference_text>
      <pubmed_id>12829005</pubmed_id>
    </reference>
    <reference>
      <reference_text>Ruiz-Stewart I, Kazerounian S, Pitari GM, Schulz S, Waldman SA: Soluble guanylate cyclase is allosterically inhibited by direct interaction with 2-substituted adenine nucleotides. Eur J Biochem. 2002 Apr;269(8):2186-93.</reference_text>
      <pubmed_id>11985597</pubmed_id>
    </reference>
    <reference>
      <reference_text>Rolfes RJ: Regulation of purine nucleotide biosynthesis: in yeast and beyond. Biochem Soc Trans. 2006 Nov;34(Pt 5):786-90.</reference_text>
      <pubmed_id>17052198</pubmed_id>
    </reference>
    <reference>
      <reference_text>Simoni RE, Gomes LN, Scalco FB, Oliveira CP, Aquino Neto FR, de Oliveira ML: Uric acid changes in urine and plasma: an effective tool in screening for purine inborn errors of metabolism and other pathological conditions. J Inherit Metab Dis. 2007 Jun;30(3):295-309. Epub 2007 May 19.</reference_text>
      <pubmed_id>17520339</pubmed_id>
    </reference>
  </general_references>
  <synthesis_reference>Baddiley, J.; Lythgoe, B.; Todd, A. R. Synthesis of purine nucleosides. II. A new and convenient synthesis of adenine. Journal of the Chemical Society (1943), 386-7.</synthesis_reference>
  <msds_url>http://hmdb.ca/system/metabolites/msds/000/000/024/original/HMDB00034.pdf?1358893297</msds_url>
  <enzymes>
    <enzyme>
      <name>Hypoxanthine phosphoribosyltransferase</name>
      <uniprot_id>P0A9M2</uniprot_id>
      <uniprot_name>HPRT_ECOLI</uniprot_name>
      <gene_name>hpt</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0A9M2.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Purine nucleoside phosphorylase deoD-type</name>
      <uniprot_id>P0ABP8</uniprot_id>
      <uniprot_name>DEOD_ECOLI</uniprot_name>
      <gene_name>deoD</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0ABP8.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>AMP nucleosidase</name>
      <uniprot_id>P0AE12</uniprot_id>
      <uniprot_name>AMN_ECOLI</uniprot_name>
      <gene_name>amn</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AE12.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase</name>
      <uniprot_id>P0AF12</uniprot_id>
      <uniprot_name>MTNN_ECOLI</uniprot_name>
      <gene_name>mtnN</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AF12.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Riboflavin synthase alpha chain</name>
      <uniprot_id>P0AFU8</uniprot_id>
      <uniprot_name>RISA_ECOLI</uniprot_name>
      <gene_name>ribE</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AFU8.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Non-specific ribonucleoside hydrolase rihC</name>
      <uniprot_id>P22564</uniprot_id>
      <uniprot_name>RIHC_ECOLI</uniprot_name>
      <gene_name>rihC</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P22564.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Adenine deaminase</name>
      <uniprot_id>P31441</uniprot_id>
      <uniprot_name>ADEC_ECOLI</uniprot_name>
      <gene_name>ade</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P31441.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Pyrimidine-specific ribonucleoside hydrolase rihB</name>
      <uniprot_id>P33022</uniprot_id>
      <uniprot_name>RIHB_ECOLI</uniprot_name>
      <gene_name>rihB</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P33022.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Adenine phosphoribosyltransferase</name>
      <uniprot_id>P69503</uniprot_id>
      <uniprot_name>APT_ECOLI</uniprot_name>
      <gene_name>apt</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P69503.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>2-(5''-triphosphoribosyl)-3'-dephosphocoenzyme-A synthase</name>
      <uniprot_id>P77231</uniprot_id>
      <uniprot_name>CITG_ECOLI</uniprot_name>
      <gene_name>citG</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P77231.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alpha-ketoglutarate-dependent dioxygenase AlkB</name>
      <uniprot_id>P05050</uniprot_id>
      <uniprot_name/>
      <gene_name>alkB</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P05050.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>S-adenosylmethionine:tRNA ribosyltransferase-isomerase</name>
      <uniprot_id>P0A7F9</uniprot_id>
      <uniprot_name>QUEA_ECOLI</uniprot_name>
      <gene_name>queA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0A7F9.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alpha-D-ribose 1-methylphosphonate 5-triphosphate synthase subunit PhnL</name>
      <uniprot_id>P16679</uniprot_id>
      <uniprot_name>PHNL_ECOLI</uniprot_name>
      <gene_name>phnL</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P16679.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alpha-D-ribose 1-methylphosphonate 5-triphosphate synthase subunit PhnI</name>
      <uniprot_id>P16687</uniprot_id>
      <uniprot_name>PHNI_ECOLI</uniprot_name>
      <gene_name>phnI</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P16687.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alpha-D-ribose 1-methylphosphonate 5-triphosphate synthase subunit PhnH</name>
      <uniprot_id>P16686</uniprot_id>
      <uniprot_name>PHNH_ECOLI</uniprot_name>
      <gene_name>phnH</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P16686.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alpha-D-ribose 1-methylphosphonate 5-triphosphate synthase subunit PhnG</name>
      <uniprot_id>P16685</uniprot_id>
      <uniprot_name>PHNG_ECOLI</uniprot_name>
      <gene_name>phnG</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P16685.xml</protein_url>
    </enzyme>
  </enzymes>
  <transporters>
    <enzyme>
      <name>Xanthine permease XanP</name>
      <uniprot_id>P0AGM9</uniprot_id>
      <uniprot_name>XANP_ECOLI</uniprot_name>
      <gene_name>xanP</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AGM9.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Probable adenine permease PurP</name>
      <uniprot_id>P31466</uniprot_id>
      <uniprot_name>PURP_ECOLI</uniprot_name>
      <gene_name>purP</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P31466.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Outer membrane protein N</name>
      <uniprot_id>P77747</uniprot_id>
      <uniprot_name>OMPN_ECOLI</uniprot_name>
      <gene_name>ompN</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P77747.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Outer membrane pore protein E</name>
      <uniprot_id>P02932</uniprot_id>
      <uniprot_name>PHOE_ECOLI</uniprot_name>
      <gene_name>phoE</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P02932.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Outer membrane protein F</name>
      <uniprot_id>P02931</uniprot_id>
      <uniprot_name>OMPF_ECOLI</uniprot_name>
      <gene_name>ompF</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P02931.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Outer membrane protein C</name>
      <uniprot_id>P06996</uniprot_id>
      <uniprot_name>OMPC_ECOLI</uniprot_name>
      <gene_name>ompC</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P06996.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alpha-D-ribose 1-methylphosphonate 5-triphosphate synthase subunit PhnG</name>
      <uniprot_id>P16685</uniprot_id>
      <uniprot_name>PHNG_ECOLI</uniprot_name>
      <gene_name>phnG</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P16685.xml</protein_url>
    </enzyme>
  </transporters>
  <reactions>
    <reaction_text>Adenosine + Water &gt; Adenine + Ribose</reaction_text>
    <kegg_reaction_id>R01245</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>S-Adenosylhomocysteine + Water &lt;&gt; Adenine + S-Ribosyl-L-homocysteine</reaction_text>
    <kegg_reaction_id>R00194</kegg_reaction_id>
    <ecocyc_id>ADENOSYLHOMOCYSTEINE-NUCLEOSIDASE-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>5'-Methylthioadenosine + Water &gt; 5-Methylthioribose + Adenine</reaction_text>
    <kegg_reaction_id>R01401</kegg_reaction_id>
    <ecocyc_id>METHYLTHIOADENOSINE-NUCLEOSIDASE-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>5'-Deoxyadenosine + Water &gt; 5'-Deoxyribose + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-6550</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Adenine + Phosphoribosyl pyrophosphate &lt;&gt; Adenosine monophosphate + Pyrophosphate</reaction_text>
    <kegg_reaction_id>R00190</kegg_reaction_id>
    <ecocyc_id>ADENPRIBOSYLTRAN-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Adenosine triphosphate + Dephospho-CoA &gt; 2'-(5-Triphosphoribosyl)-3'-dephospho-CoA + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>2.7.8.25-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Adenosine monophosphate + Water &lt;&gt; Adenine + D-Ribose-5-phosphate</reaction_text>
    <kegg_reaction_id>R00182</kegg_reaction_id>
    <ecocyc_id>AMP-NUCLEOSID-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Adenine + Hydrogen ion + Water &gt; Hypoxanthine + Ammonium</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine + Phosphate &lt;&gt; Adenine + Ribose-1-phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>ADENPHOSPHOR-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Deoxyadenosine + Phosphate &lt;&gt; Deoxyribose 1-phosphate + Adenine</reaction_text>
    <kegg_reaction_id>R02557</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine monophosphate + Pyrophosphate &lt;&gt; Adenine + Phosphoribosyl pyrophosphate</reaction_text>
    <kegg_reaction_id>R00190</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenine + Water &lt;&gt; Hypoxanthine + Ammonia</reaction_text>
    <kegg_reaction_id>R01244</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine + Water &lt;&gt; Adenine + Ribose</reaction_text>
    <kegg_reaction_id>R01245</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>5'-Methylthioadenosine + Water &lt;&gt; Adenine + 5-Methylthioribose</reaction_text>
    <kegg_reaction_id>R01401</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine + Phosphate &lt;&gt; Adenine + alpha-D-Ribose 1-phosphate</reaction_text>
    <kegg_reaction_id>R01561</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Methylphosphonate + Adenosine triphosphate &gt; &amp;alpha;-D-ribose-1-methylphosphonate-5-triphosphate + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-6732</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Hydrogen ion + Dephospho-CoA + Adenosine triphosphate &gt; 2'-(5-Triphosphoribosyl)-3'-dephospho-CoA + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>2.7.8.25-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Water + Adenine &gt; Ammonia + Hypoxanthine</reaction_text>
    <kegg_reaction_id>R01244</kegg_reaction_id>
    <ecocyc_id>ADENINE-DEAMINASE-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Adenosine + Water &gt; D-ribose + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>ADENOSINE-NUCLEOSIDASE-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>S-Ribosyl-L-homocysteine + Adenine &lt; S-Adenosylhomocysteine + Water</reaction_text>
    <kegg_reaction_id>R00194</kegg_reaction_id>
    <ecocyc_id>ADENOSYLHOMOCYSTEINE-NUCLEOSIDASE-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Pyrophosphate + Adenosine monophosphate &lt; Phosphoribosyl pyrophosphate + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>ADENPRIBOSYLTRAN-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Water + Adenosine monophosphate &gt; D-Ribose-5-phosphate + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>AMP-NUCLEOSID-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Deoxyadenosine + Phosphate &lt;&gt; Adenine + deoxyribose-1-phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>DEOXYADENPHOSPHOR-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>N1-Methyladenine + Oxygen + Oxoglutaric acid &gt; Hydrogen ion + Adenine + Carbon dioxide + Formaldehyde + Succinic acid</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-984</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>1-Ethyladenine + Oxygen + Oxoglutaric acid &gt; Adenine + Carbon dioxide + Acetaldehyde + Succinic acid</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-986</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Adenosine monophosphate + Pyrophosphate &gt; Adenine + Phosphoribosyl pyrophosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>S-Adenosylhomocysteine + Water &gt; S-Ribosyl-L-homocysteine + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>5'-Methylthioadenosine + Water &gt; S-methyl-5-thio-D-ribose + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>S-adenosyl-L-methionine + 7-Aminomethyl-7-deazaguanosine &gt; L-Methionine + Adenine + epoxyqueuosine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine triphosphate + Dephospho-CoA &lt;&gt; 2'-(5-Triphosphoribosyl)-3'-dephospho-CoA + Adenine</reaction_text>
    <kegg_reaction_id>R09675 </kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine triphosphate + Methylphosphonate &lt;&gt; alpha-D-Ribose 1-methylphosphonate 5-triphosphate + Adenine</reaction_text>
    <kegg_reaction_id>R10185 </kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>S-Adenosylhomocysteine + Water &gt; Adenine +  S-ribosyl-L-homocysteine +  S-ribosyl-L-homocysteine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R003067</pw_reaction_id>
    <reaction_text>5'-S-methyl-5'-thioadenosine + Water &gt; 5-Methylthioribose + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R005167</pw_reaction_id>
    <reaction_text>7-aminomethyl-7-deazaguanosine34 in tRNA + S-adenosyl-L-methionine &gt; Hydrogen ion + L-Methionine + Adenine + epoxyqueuosine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R005185</pw_reaction_id>
    <reaction_text>S-Adenosylhomocysteine + Water &gt; Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R006077</pw_reaction_id>
    <reaction_text>Adenosine + Water &gt; beta-D-ribofuranose + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R006054</pw_reaction_id>
    <reaction_text>Methylphosphonate + Adenosine triphosphate &gt; Adenine + alpha-D-Ribose 1-methylphosphonate 5-triphosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R006035</pw_reaction_id>
    <reaction_text>Adenine + Ribose-1-phosphate &gt; Phosphate + Adenosine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R006047</pw_reaction_id>
    <reaction_text>Adenosine + Phosphate &gt; Adenine + Ribose-1-phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R006066</pw_reaction_id>
    <reaction_text>Deoxyadenosine + Phosphate &gt; Adenine + Deoxyribose 1-phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R006069</pw_reaction_id>
    <reaction_text>Adenine + Phosphoribosyl pyrophosphate &gt; Pyrophosphate + Adenosine monophosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R006055</pw_reaction_id>
    <reaction_text>Adenosine triphosphate + Methylphosphonate &lt;&gt; alpha-D-Ribose 1-methylphosphonate 5-triphosphate + Adenine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine monophosphate + Water &lt;&gt; Adenine + D-Ribose-5-phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
  </reactions>
  <concentrations>
    <growth_media>Gutnick minimal complete medium (4.7 g/L KH2PO4; 13.5 g/L K2HPO4; 1 g/L K2SO4; 0.1 g/L MgSO4-7H2O; 10 mM NH4Cl) with 4 g/L glucose</growth_media>
    <growth_system>Shake flask and filter culture</growth_system>
    <concentration>1.47</concentration>
    <concentration_units>uM</concentration_units>
    <internal/>
    <error>0.0</error>
    <temperature>37 oC</temperature>
    <strain>K12 NCM3722</strain>
    <growth_status>Mid-Log Phase</growth_status>
    <molecules>5880</molecules>
    <molecules_error>0</molecules_error>
    <reference>
      <reference_text>Bennett, B. D., Kimball, E. H., Gao, M., Osterhout, R., Van Dien, S. J., Rabinowitz, J. D. (2009). "Absolute metabolite concentrations and implied enzyme active site occupancy in Escherichia coli." Nat Chem Biol 5:593-599.</reference_text>
      <pubmed_id>19561621</pubmed_id>
    </reference>
    <growth_media>Gutnick minimal complete medium (4.7 g/L KH2PO4; 13.5 g/L K2HPO4; 1 g/L K2SO4; 0.1 g/L MgSO4-7H2O; 10 mM NH4Cl) with 4 g/L glycerol</growth_media>
    <growth_system>Shake flask and filter culture</growth_system>
    <concentration>1.47</concentration>
    <concentration_units>uM</concentration_units>
    <internal/>
    <error>0.0</error>
    <temperature>37 oC</temperature>
    <strain>K12 NCM3722</strain>
    <growth_status>Mid-Log Phase</growth_status>
    <molecules>5880</molecules>
    <molecules_error>0</molecules_error>
    <reference>
      <reference_text>Bennett, B. D., Kimball, E. H., Gao, M., Osterhout, R., Van Dien, S. J., Rabinowitz, J. D. (2009). "Absolute metabolite concentrations and implied enzyme active site occupancy in Escherichia coli." Nat Chem Biol 5:593-599.</reference_text>
      <pubmed_id>19561621</pubmed_id>
    </reference>
    <growth_media>Gutnick minimal complete medium (4.7 g/L KH2PO4; 13.5 g/L K2HPO4; 1 g/L K2SO4; 0.1 g/L MgSO4-7H2O; 10 mM NH4Cl) with 4 g/L acetate</growth_media>
    <growth_system>Shake flask and filter culture</growth_system>
    <concentration>1.47</concentration>
    <concentration_units>uM</concentration_units>
    <internal/>
    <error>0.0</error>
    <temperature>37 oC</temperature>
    <strain>K12 NCM3722</strain>
    <growth_status>Mid-Log Phase</growth_status>
    <molecules>5880</molecules>
    <molecules_error>0</molecules_error>
    <reference>
      <reference_text>Bennett, B. D., Kimball, E. H., Gao, M., Osterhout, R., Van Dien, S. J., Rabinowitz, J. D. (2009). "Absolute metabolite concentrations and implied enzyme active site occupancy in Escherichia coli." Nat Chem Biol 5:593-599.</reference_text>
      <pubmed_id>19561621</pubmed_id>
    </reference>
    <growth_media>48 mM Na2HPO4, 22 mM KH2PO4, 10 mM NaCl, 45 mM (NH4)2SO4, supplemented with 1 mM MgSO4, 1 mg/l thiamine·HCl, 5.6 mg/l CaCl2, 8 mg/l FeCl3, 1 mg/l MnCl2·4H2O, 1.7 mg/l ZnCl2, 0.43 mg/l CuCl2·2H2O, 0.6 mg/l CoCl2·2H2O and 0.6 mg/l Na2MoO4·2H2O.  4 g/L Gluco</growth_media>
    <growth_system>Bioreactor, pH controlled, O2 and CO2 controlled, dilution rate: 0.2/h</growth_system>
    <concentration>102.0</concentration>
    <concentration_units>uM</concentration_units>
    <internal/>
    <error>0.0</error>
    <temperature>37 oC</temperature>
    <strain>BW25113</strain>
    <growth_status>Stationary Phase, glucose limited</growth_status>
    <molecules>408000</molecules>
    <molecules_error>0</molecules_error>
    <reference>
      <reference_text>Ishii, N., Nakahigashi, K., Baba, T., Robert, M., Soga, T., Kanai, A., Hirasawa, T., Naba, M., Hirai, K., Hoque, A., Ho, P. Y., Kakazu, Y., Sugawara, K., Igarashi, S., Harada, S., Masuda, T., Sugiyama, N., Togashi, T., Hasegawa, M., Takai, Y., Yugi, K., Arakawa, K., Iwata, N., Toya, Y., Nakayama, Y., Nishioka, T., Shimizu, K., Mori, H., Tomita, M. (2007). "Multiple high-throughput analyses monitor the response of E. coli to perturbations." Science 316:593-597.</reference_text>
      <pubmed_id>17379776</pubmed_id>
    </reference>
    <growth_media>Luria-Bertani (LB) media</growth_media>
    <growth_system>Shake flask</growth_system>
    <concentration>34.5</concentration>
    <concentration_units>uM</concentration_units>
    <internal>true</internal>
    <error>10.0</error>
    <temperature>37 oC</temperature>
    <strain>BL21 DE3</strain>
    <growth_status>Stationary phase cultures (overnight culture)</growth_status>
    <molecules>138000</molecules>
    <molecules_error>40000</molecules_error>
    <reference>
      <reference_text>Lin, Z., Johnson, L. C., Weissbach, H., Brot, N., Lively, M. O., Lowther, W. T. (2007). "Free methionine-(R)-sulfoxide reductase from Escherichia coli reveals a new GAF domain function." Proc Natl Acad Sci U S A 104:9597-9602.</reference_text>
      <pubmed_id>17535911</pubmed_id>
    </reference>
  </concentrations>
</compound>
