<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>2.0</version>
  <creation_date>2012-05-31 13:49:38 -0600</creation_date>
  <update_date>2015-09-13 12:56:10 -0600</update_date>
  <accession>ECMDB01310</accession>
  <m2m_id>M2MDB000333</m2m_id>
  <name>D-Alanine</name>
  <description>D-Alanine is an amino acid and one of the most important molecules in living organisms. It has a chiral carbon at a -position.</description>
  <synonyms>
    <synonym>(R)-Alanine</synonym>
    <synonym>D(-)-a -Alanine</synonym>
    <synonym>D(-)-a-Alanine</synonym>
    <synonym>D(-)-alpha-Alanine</synonym>
    <synonym>D(-)-α-Alanine</synonym>
    <synonym>D-(-)-Alanine</synonym>
    <synonym>D-2-Aminopropionate</synonym>
    <synonym>D-2-Aminopropionic acid</synonym>
    <synonym>D-a-Alanine</synonym>
    <synonym>D-Ala</synonym>
    <synonym>D-Alanine</synonym>
    <synonym>D-alpha-Alanine</synonym>
    <synonym>D-α-Alanine</synonym>
    <synonym>Delta-(-)-Alanine</synonym>
    <synonym>Delta-2-Aminopropionate</synonym>
    <synonym>Delta-2-Aminopropionic acid</synonym>
    <synonym>delta-a-Alanine</synonym>
    <synonym>Delta-Alanine</synonym>
    <synonym>Delta-alpha-Alanine</synonym>
    <synonym>Dl-Alanine</synonym>
    <synonym>δ-(-)-Alanine</synonym>
    <synonym>δ-2-Aminopropionate</synonym>
    <synonym>δ-2-Aminopropionic acid</synonym>
    <synonym>δ-a-Alanine</synonym>
    <synonym>δ-Alanine</synonym>
    <synonym>δ-α-Alanine</synonym>
  </synonyms>
  <chemical_formula>C3H7NO2</chemical_formula>
  <average_molecular_weight>89.0932</average_molecular_weight>
  <monisotopic_moleculate_weight>89.047678473</monisotopic_moleculate_weight>
  <iupac_name>(2R)-2-aminopropanoic acid</iupac_name>
  <traditional_iupac>D-alanine</traditional_iupac>
  <cas_registry_number>338-69-2</cas_registry_number>
  <smiles>C[C@@H](N)C(O)=O</smiles>
  <inchi>InChI=1S/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/t2-/m1/s1</inchi>
  <inchikey>QNAYBMKLOCPYGJ-UWTATZPHSA-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>-3.05</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>0.70</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>4.47e+02 g/l</value>
      <source>ALOGPS</source>
    </property>
  </predicted_properties>
  <experimental_properties>
    <property>
      <kind>melting_point</kind>
      <value>292 oC</value>
    </property>
  </experimental_properties>
  <property>
    <kind>logp</kind>
    <value>-2.8</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_acidic</kind>
    <value>2.47</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_basic</kind>
    <value>9.48</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>iupac</kind>
    <value>(2R)-2-aminopropanoic acid</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>average_mass</kind>
    <value>89.0932</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>mono_mass</kind>
    <value>89.047678473</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>smiles</kind>
    <value>C[C@@H](N)C(O)=O</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formula</kind>
    <value>C3H7NO2</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchi</kind>
    <value>InChI=1S/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/t2-/m1/s1</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchikey</kind>
    <value>QNAYBMKLOCPYGJ-UWTATZPHSA-N</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polar_surface_area</kind>
    <value>63.32</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>refractivity</kind>
    <value>20.5</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polarizability</kind>
    <value>8.54</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>rotatable_bond_count</kind>
    <value>1</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>acceptor_count</kind>
    <value>3</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>Vitamin B6 metabolism</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>ec00750</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>Peptidoglycan biosynthesis</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>ec00550</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>D-Alanine metabolism</name>
      <description>L-alanine is an essential component of protein and peptidoglycan. The latter also contains about three molecules of D-alanine for every L-alanine. Only about 10 percent of the total alanine synthesized flows into peptidoglycan.
Refer to L-alanine metabolism (pathway PW000788 ).
Through this single pathway D-alanine can be degraded to pyruvate through a D-amino acid dehydrogenase, which enters central metabolism and thereby can serve as a total source of carbon and energy. This pathway is unique among those through which L-amino acids are degraded, in that the L form must first be converted to the D form. This first step of the pathway, which can be catalyzed by either of two racemases( biosynthetic or catabolic), also serves an essential role in biosynthesis because its product, D-alanine, is an essential component of cell wall peptidoglycan (murein). D-alanine  is metabolized  by an ATP driven D-alanine ligase A and B resulting in D-alanyl-D-alanine. This product is incorporated into the peptidoglycan biosynthesis.
</description>
      <pathwhiz_id>PW000768</pathwhiz_id>
      <kegg_map_id>ec00473</kegg_map_id>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>Metabolic pathways</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>eco01100</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>Vancomycin resistance</name>
      <description/>
      <pathwhiz_id/>
      <kegg_map_id>eco01502</kegg_map_id>
      <subject/>
    </pathway>
    <pathway>
      <name>L-alanine metabolism</name>
      <description>L-alanine is an essential component of proteins and peptidoglycan. The latter also contains about three molecules of D-alanine for every L-alanine. Only about 10 percent of the total alanine synthesized flows into peptidoglycan.

There are at least 3 ways to begin the biosynthesis of alanine. 
The first method for alanine biosynthesis begins with L-cysteine produced from L-cysteine biosynthesis pathway. L-cysteine reacts with an [L-cysteine desulfurase] L-cysteine persulfide through a cysteine desulfurase resulting in a release of [L-cysteine desulfurase] l-cysteine persulfide and L-alanine.
The second method starts with pyruvic acid reacting with L-glutamic acid through a glutamate-pyruvate aminotransferase resulting in a oxoglutaric acid and L-alanine.
The third method starts with L-glutamic acid interacting with Alpha-ketoisovaleric acid through a valine transaminase resulting in an oxoglutaric acid and L-valine. L-valine reacts with pyruvic acid through a valine-pyruvate aminotransferase resulting Alpha-ketoisovaleric acid and L-alanine.
This first step of the pathway, which can be catalyzed by either of two racemases( biosynthetic or catabolic), also serves an essential role in biosynthesis because its product, D-alanine, is an essential component of cell wall peptidoglycan (murein). D-alanine  is metabolized  by an ATP driven D-alanine ligase A and B resulting in D-alanyl-D-alanine. This product is incorporated into the peptidoglycan biosynthesis.
L-alanine is metabolized with alanine racemase, either catabolic or metabolic resulting in a D-alanine. This compound reacts with water and a quinone through a 
D-amino acid dehydrogenase  resulting in Pyruvic acid, hydroquinone and ammonium, thus entering the central metabolism and thereby can serve as a total source of carbon and energy. This pathway is unique among those through which L-amino acids are degraded, in that the L form must first be converted to the D form. 
D-alanine, is an essential component of cell wall peptidoglycan (murein). The role of the alr racemase is predominately biosynthetic: it is produced constitutively in small amounts. The role of the dadX racemase is degradative: it is induced to high levels by alanine and is subject to catabolite repression.
</description>
      <pathwhiz_id>PW000788</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>inner membrane transport</name>
      <description>list of inner membrane transport complexes, transporting compounds from the periplasmic space to the cytosol
This pathway should be updated regularly with the new inner membrae transports added</description>
      <pathwhiz_id>PW000786</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>peptidoglycan biosynthesis I</name>
      <description>Peptidoglycan is a net-like polymer which surrounds the cytoplasmic membrane of most bacteria and functions to maintain cell shape and prevent rupture due to the internal turgor.In E. coli K-12, the peptidoglycan consists of glycan strands of alternating subunits of N-acetylglucosamine (GlcNAc) and N-acetylmuramic acid (MurNAc) which are cross-linked by short peptides. The pathway for constructing this net involves two cell compartments: cytoplasm and periplasmic space. 
The pathway starts with a beta-D-fructofuranose going through a mannose  PTS permease, phosphorylating the compund and producing a beta-D-fructofuranose 6 phosphate. This compound can be obtained from the glycolysis and pyruvate dehydrogenase or from an isomerization reaction of Beta-D-glucose 6-phosphate through a glucose-6-phosphate isomerase.The compound Beta-D-fructofuranose 6 phosphate and L-Glutamine react with a glucosamine fructose-6-phosphate aminotransferase, thus producing a glucosamine 6-phosphate  and a l-glutamic acid. The glucosamine 6-phosphate interacts with phosphoglucosamine mutase in a reversible reaction producing glucosamine-1P. Glucosamine-1p and acetyl coa undergo acetylation throuhg a bifunctional protein glmU releasing Coa and a hydrogen ion and producing a N-acetyl-glucosamine 1-phosphate. Glmu, being a bifunctional protein, follows catalyze the interaction of N-acetyl-glucosamine 1-phosphate, hydrogen ion and UTP into UDP-N-acetylglucosamine and pyrophosphate. UDP-N-acetylglucosamine then interacts with phosphoenolpyruvic acid and a UDP-N acetylglucosamine 1- carboxyvinyltransferase realeasing a phosphate and the compound UDP-N-acetyl-alpha-D-glucosamine-enolpyruvate. This compound undergoes a NADPH dependent reduction producing a UDP-N-acetyl-alpha-D-muramate through a UDP-N-acetylenolpyruvoylglucosamine reductase. UDP-N-acetyl-alpha-D-muramate and L-alanine react in an ATP-mediated ligation through a UDP-N-acetylmuramate-alanine ligase releasing an ADP, hydrogen ion, a phosphate and a UDP-N-acetylmuramoyl-L-alanine. This compound interacts with D-glutamic acid and ATP through  UDP-N-acetylmuramoylalanine-D-glutamate ligase releasing ADP, A phosphate and UDP-N-acetylmuramoyl-L-alanyl-D-glutamate. The latter compound then interacts with meso-diaminopimelate in an ATP mediated ligation through a UDP-N-acetylmuramoylalanine-D-glutamate-2,6-diaminopimelate ligase resulting in ADP, phosphate, hydrogen ion and UDP-N-Acetylmuramoyl-L-alanyl-D-gamma-glutamyl-meso-2,6-diaminopimelate. This compound in turn with D-alanyl-D-alanine react in an ATP-mediated ligation through UDP-N-Acetylmuramoyl-tripeptide-D-alanyl-D-alanine ligase to produce UDP-N-acetyl-alpha-D-muramoyl-L-alanyl-gama-D-glutamyl-meso-2,6-diaminopimeloyl-Dalanyl-D-alanine and hydrogen ion, ADP, phosphate. UDP-N-acetyl-alpha-D-muramoyl-L-alanyl-gama-D-glutamyl-meso-2,6-diaminopimeloyl-Dalanyl-D-alanine interacts with di-trans,octa-cis-undecaprenyl phosphate through a phospho-N-acetylmuramoyl-pentapeptide-transferase, resulting in UMP and Undecaprenyl-diphospho-N-acetylmuramoyl-L-alanyl-D-glutamyl-meso-2,6-diaminopimeloyl-D-alanyl-D-alanine which in turn reacts with a UDP-N-acetylglucosamine through a N-acetylglucosaminyl transferase to produce a hydrogen, UDP and ditrans,octacis-undecaprenyldiphospho-N-acetyl-(N-acetylglucosaminyl)muramoyl-L-alanyl-gamma-D-glutamyl-meso-2,6-diaminopimeloyl-D-alanyl-D-alanine. This compound ends the cytoplasmic part of the pathway. ditrans,octacis-undecaprenyldiphospho-N-acetyl-(N-acetylglucosaminyl)muramoyl-L-alanyl-gamma-D-glutamyl-meso-2,6-diaminopimeloyl-D-alanyl-D-alanine is transported through a lipi II flippase. Once in the periplasmic space, the compound reacts with a penicillin binding protein 1A prodducing a peptidoglycan dimer, a hydrogen ion, and UDP. The peptidoglycan dimer then reacts with a penicillin binding protein 1B  producing a peptidoglycan with D,D, cross-links and a D-alanine. 
</description>
      <pathwhiz_id>PW000906</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>peptidoglycan biosynthesis I 2</name>
      <description>Peptidoglycan is a net-like polymer which surrounds the cytoplasmic membrane of most bacteria and functions to maintain cell shape and prevent rupture due to the internal turgor.In E. coli K-12, the peptidoglycan consists of glycan strands of alternating subunits of N-acetylglucosamine (GlcNAc) and N-acetylmuramic acid (MurNAc) which are cross-linked by short peptides. The pathway for constructing this net involves two cell compartments: cytoplasm and periplasmic space. The pathway starts with a beta-D-fructofuranose going through a mannose PTS permease, phosphorylating the compund and producing a beta-D-fructofuranose 6 phosphate. This compound can be obtained from the glycolysis and pyruvate dehydrogenase or from an isomerization reaction of Beta-D-glucose 6-phosphate through a glucose-6-phosphate isomerase.The compound Beta-D-fructofuranose 6 phosphate and L-Glutamine react with a glucosamine fructose-6-phosphate aminotransferase, thus producing a glucosamine 6-phosphate and a l-glutamic acid. The glucosamine 6-phosphate interacts with phosphoglucosamine mutase in a reversible reaction producing glucosamine-1P. Glucosamine-1p and acetyl coa undergo acetylation throuhg a bifunctional protein glmU releasing Coa and a hydrogen ion and producing a N-acetyl-glucosamine 1-phosphate. Glmu, being a bifunctional protein, follows catalyze the interaction of N-acetyl-glucosamine 1-phosphate, hydrogen ion and UTP into UDP-N-acetylglucosamine and pyrophosphate. UDP-N-acetylglucosamine then interacts with phosphoenolpyruvic acid and a UDP-N acetylglucosamine 1- carboxyvinyltransferase realeasing a phosphate and the compound UDP-N-acetyl-alpha-D-glucosamine-enolpyruvate. This compound undergoes a NADPH dependent reduction producing a UDP-N-acetyl-alpha-D-muramate through a UDP-N-acetylenolpyruvoylglucosamine reductase. UDP-N-acetyl-alpha-D-muramate and L-alanine react in an ATP-mediated ligation through a UDP-N-acetylmuramate-alanine ligase releasing an ADP, hydrogen ion, a phosphate and a UDP-N-acetylmuramoyl-L-alanine. This compound interacts with D-glutamic acid and ATP through UDP-N-acetylmuramoylalanine-D-glutamate ligase releasing ADP, A phosphate and UDP-N-acetylmuramoyl-L-alanyl-D-glutamate. The latter compound then interacts with meso-diaminopimelate in an ATP mediated ligation through a UDP-N-acetylmuramoylalanine-D-glutamate-2,6-diaminopimelate ligase resulting in ADP, phosphate, hydrogen ion and UDP-N-Acetylmuramoyl-L-alanyl-D-gamma-glutamyl-meso-2,6-diaminopimelate. This compound in turn with D-alanyl-D-alanine react in an ATP-mediated ligation through UDP-N-Acetylmuramoyl-tripeptide-D-alanyl-D-alanine ligase to produce UDP-N-acetyl-alpha-D-muramoyl-L-alanyl-gama-D-glutamyl-meso-2,6-diaminopimeloyl-Dalanyl-D-alanine and hydrogen ion, ADP, phosphate. UDP-N-acetyl-alpha-D-muramoyl-L-alanyl-gama-D-glutamyl-meso-2,6-diaminopimeloyl-Dalanyl-D-alanine interacts with di-trans,octa-cis-undecaprenyl phosphate through a phospho-N-acetylmuramoyl-pentapeptide-transferase, resulting in UMP and N-Acetylmuramoyl-L-alanyl-D-glutamyl-meso-2,6-diaminopimelyl-D-alanyl-D-alanine-diphosphoundecaprenol which in turn reacts with a UDP-N-acetylglucosamine through a N-acetylglucosaminyl transferase to produce a hydrogen, UDP and Undecaprenyl-diphospho-N-acetylmuramoyl-(N-acetylglucosamine)-L-alanyl-D-glutaminyl-meso-2,6-diaminopimeloyl-D-alanyl-D-alanine. This compound ends the cytoplasmic part of the pathway. Undecaprenyl-diphospho-N-acetylmuramoyl-(N-acetylglucosamine)-L-alanyl-D-glutaminyl-meso-2,6-diaminopimeloyl-D-alanyl-D-alanine is transported through a lipi II flippase. Once in the periplasmic space, the compound reacts with a penicillin binding protein 1A prodducing a peptidoglycan dimer, a hydrogen ion, and UDP. The peptidoglycan dimer then reacts with a penicillin binding protein 1B producing a peptidoglycan with D,D, cross-links and a D-alanine.</description>
      <pathwhiz_id>PW002062</pathwhiz_id>
      <kegg_map_id/>
      <subject>Metabolic</subject>
    </pathway>
    <pathway>
      <name>alanine biosynthesis I</name>
      <ecocyc_pathway_id>ALANINE-VALINESYN-PWY</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>UDP-&lt;i&gt;N&lt;/i&gt;-acetylmuramoyl-pentapeptide biosynthesis III (&lt;i&gt;meso&lt;/i&gt;-DAP-containing)</name>
      <ecocyc_pathway_id>PWY-6387</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>alanine degradation I</name>
      <ecocyc_pathway_id>ALADEG-PWY</ecocyc_pathway_id>
    </pathway>
    <pathway>
      <name>peptidoglycan biosynthesis I (&lt;I&gt;meso&lt;/I&gt;-diaminopimelate containing)</name>
      <ecocyc_pathway_id>PEPTIDOGLYCANSYN-PWY</ecocyc_pathway_id>
    </pathway>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>2623</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>38016</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::CMs</type>
      <spectrum_id>148378</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>1679</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>5005</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147290</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147291</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147292</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147293</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147294</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147295</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147296</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147297</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147298</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147299</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147300</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147301</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147302</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147303</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147304</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147305</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147306</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147307</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147308</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrOneD</type>
      <spectrum_id>147309</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>1510</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>1511</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>1512</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>5179</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>5180</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>5181</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>5182</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>5183</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>5184</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>5185</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>178554</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>178555</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>178556</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>180873</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>180874</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>180875</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>437094</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>437095</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>440036</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>440120</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>445521</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>445522</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>445523</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>445524</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>445525</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::NmrTwoD</type>
      <spectrum_id>1620</spectrum_id>
    </spectrum>
  </spectra>
  <hmdb_id>HMDB01310</hmdb_id>
  <pubchem_compound_id>71080</pubchem_compound_id>
  <chemspider_id>64234</chemspider_id>
  <kegg_id>C00133</kegg_id>
  <chebi_id>15570</chebi_id>
  <biocyc_id>D-ALANINE</biocyc_id>
  <het_id>DAL</het_id>
  <wikipidia>D-Alanine</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>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>Hamase K, Konno R, Morikawa A, Zaitsu K: Sensitive determination of D-amino acids in mammals and the effect of D-amino-acid oxidase activity on their amounts. Biol Pharm Bull. 2005 Sep;28(9):1578-84.</reference_text>
      <pubmed_id>16141519</pubmed_id>
    </reference>
    <reference>
      <reference_text>D'Aniello A, Vetere A, Fisher GH, Cusano G, Chavez M, Petrucelli L: Presence of D-alanine in proteins of normal and Alzheimer human brain. Brain Res. 1992 Oct 2;592(1-2):44-8.</reference_text>
      <pubmed_id>1450921</pubmed_id>
    </reference>
    <reference>
      <reference_text>Fukushima T, Santa T, Homma H, Nagatomo R, Imai K: Determination of D-amino acids in serum from patients with renal dysfunction. Biol Pharm Bull. 1995 Aug;18(8):1130-2.</reference_text>
      <pubmed_id>8535409</pubmed_id>
    </reference>
    <reference>
      <reference_text>Nagata Y, Masui R, Akino T: The presence of free D-serine, D-alanine and D-proline in human plasma. Experientia. 1992 Oct 15;48(10):986-8.</reference_text>
      <pubmed_id>1426150</pubmed_id>
    </reference>
    <reference>
      <reference_text>Fisher GH, D'Aniello A, Vetere A, Padula L, Cusano GP, Man EH: Free D-aspartate and D-alanine in normal and Alzheimer brain. Brain Res Bull. 1991 Jun;26(6):983-5.</reference_text>
      <pubmed_id>1933416</pubmed_id>
    </reference>
  </general_references>
  <synthesis_reference/>
  <msds_url>http://hmdb.ca/system/metabolites/msds/000/001/172/original/HMDB01310.pdf?1358894033</msds_url>
  <enzymes>
    <enzyme>
      <name>Penicillin-binding protein 1A</name>
      <uniprot_id>P02918</uniprot_id>
      <uniprot_name>PBPA_ECOLI</uniprot_name>
      <gene_name>mrcA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P02918.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Penicillin-binding protein 1B</name>
      <uniprot_id>P02919</uniprot_id>
      <uniprot_name>PBPB_ECOLI</uniprot_name>
      <gene_name>mrcB</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P02919.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-alanine--D-alanine ligase B</name>
      <uniprot_id>P07862</uniprot_id>
      <uniprot_name>DDLB_ECOLI</uniprot_name>
      <gene_name>ddlB</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P07862.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alanine racemase, biosynthetic</name>
      <uniprot_id>P0A6B4</uniprot_id>
      <uniprot_name>ALR1_ECOLI</uniprot_name>
      <gene_name>alr</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0A6B4.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-amino acid dehydrogenase small subunit</name>
      <uniprot_id>P0A6J5</uniprot_id>
      <uniprot_name>DADA_ECOLI</uniprot_name>
      <gene_name>dadA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0A6J5.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-alanine--D-alanine ligase A</name>
      <uniprot_id>P0A6J8</uniprot_id>
      <uniprot_name>DDLA_ECOLI</uniprot_name>
      <gene_name>ddlA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0A6J8.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Serine hydroxymethyltransferase</name>
      <uniprot_id>P0A825</uniprot_id>
      <uniprot_name>GLYA_ECOLI</uniprot_name>
      <gene_name>glyA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0A825.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Peptidoglycan synthase ftsI</name>
      <uniprot_id>P0AD68</uniprot_id>
      <uniprot_name>FTSI_ECOLI</uniprot_name>
      <gene_name>ftsI</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AD68.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Alanine racemase, catabolic</name>
      <uniprot_id>P29012</uniprot_id>
      <uniprot_name>ALR2_ECOLI</uniprot_name>
      <gene_name>dadX</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P29012.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Low specificity L-threonine aldolase</name>
      <uniprot_id>P75823</uniprot_id>
      <uniprot_name>LTAE_ECOLI</uniprot_name>
      <gene_name>ltaE</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P75823.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Murein tetrapeptide carboxypeptidase</name>
      <uniprot_id>P76008</uniprot_id>
      <uniprot_name>LDCA_ECOLI</uniprot_name>
      <gene_name>ldcA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P76008.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-alanyl-D-alanine carboxypeptidase dacC</name>
      <uniprot_id>P08506</uniprot_id>
      <uniprot_name>DACC_ECOLI</uniprot_name>
      <gene_name>dacC</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P08506.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-alanyl-D-alanine carboxypeptidase dacD</name>
      <uniprot_id>P33013</uniprot_id>
      <uniprot_name>DACD_ECOLI</uniprot_name>
      <gene_name>dacD</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P33013.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Penicillin-binding protein 2</name>
      <uniprot_id>P0AD65</uniprot_id>
      <uniprot_name>PBP2_ECOLI</uniprot_name>
      <gene_name>mrdA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AD65.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-alanyl-D-alanine carboxypeptidase dacA</name>
      <uniprot_id>P0AEB2</uniprot_id>
      <uniprot_name>DACA_ECOLI</uniprot_name>
      <gene_name>dacA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AEB2.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-alanyl-D-alanine dipeptidase</name>
      <uniprot_id>P77790</uniprot_id>
      <uniprot_name>DDPX_ECOLI</uniprot_name>
      <gene_name>ddpX</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P77790.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-alanyl-D-alanine carboxypeptidase dacB</name>
      <uniprot_id>P24228</uniprot_id>
      <uniprot_name>DACB_ECOLI</uniprot_name>
      <gene_name>dacB</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P24228.xml</protein_url>
    </enzyme>
  </enzymes>
  <transporters>
    <enzyme>
      <name>Uncharacterized amino-acid ABC transporter ATP-binding protein yecC</name>
      <uniprot_id>P37774</uniprot_id>
      <uniprot_name>YECC_ECOLI</uniprot_name>
      <gene_name>yecC</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P37774.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>Inner membrane amino-acid ABC transporter permease protein yecS</name>
      <uniprot_id>P0AFT2</uniprot_id>
      <uniprot_name>YECS_ECOLI</uniprot_name>
      <gene_name>yecS</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AFT2.xml</protein_url>
    </enzyme>
    <enzyme>
      <name>D-serine/D-alanine/glycine transporter</name>
      <uniprot_id>P0AAE0</uniprot_id>
      <uniprot_name>CYCA_ECOLI</uniprot_name>
      <gene_name>cycA</gene_name>
      <protein_url>http://ecmdb.ca/proteins/P0AAE0.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>
  </transporters>
  <reactions>
    <reaction_text>two linked disacharide pentapeptide murein units (uncrosslinked, middle of chain) &gt; D-Alanine + two disacharide linked murein units, pentapeptide crosslinked tetrapeptide (A2pm-&gt;D-ala) (middle of chain)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>three linked disacharide pentapeptide murein units (uncrosslinked, middle of chain) &gt;2 D-Alanine + three disacharide linked murein units (pentapeptide crosslinked tetrapeptide (A2pm-&gt;D-ala) tetrapeptide corsslinked tetrapeptide (A2pm-&gt;D-ala)) (middle of chain)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>2 D-Alanine + Adenosine triphosphate &lt;&gt; ADP + D-Alanyl-D-alanine + Hydrogen ion + Phosphate</reaction_text>
    <kegg_reaction_id>R01150</kegg_reaction_id>
    <ecocyc_id>DALADALALIG-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Water + three disacharide linked murein units (pentapeptide crosslinked tetrapeptide (A2pm-&gt;D-ala) tetrapeptide corsslinked tetrapeptide (A2pm-&gt;D-ala)) (middle of chain) &gt; D-Alanine + three disacharide linked murein units (tetrapeptide crosslinked tetrapeptide (A2pm-&gt;D-ala) &amp; tetrapeptide corsslinked tetrapeptide (A2pm-&gt;D-ala)) (middle of chain)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Water + two disacharide linked murein units, pentapeptide crosslinked tetrapeptide (A2pm-&gt;D-ala) (middle of chain) &gt; D-Alanine + two disacharide linked murein units, tetrapeptide corsslinked tetrapeptide (A2pm-&gt;D-ala) (middle of chain)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Water + two linked disacharide pentapeptide and tetrapeptide murein units (uncrosslinked, middle of chain) &gt; D-Alanine + two linked disacharide tetrapeptide murein units (uncrosslinked, middle of chain)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Water + two linked disacharide pentapeptide and tripeptide murein units (uncrosslinked, middle of chain) &gt; D-Alanine + two linked disacharide tetrapeptide and tripeptide murein units (uncrosslinked, middle of chain)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Water + two linked disacharide pentapeptide murein units (uncrosslinked, middle of chain) &gt; D-Alanine + two linked disacharide pentapeptide and tetrapeptide murein units (uncrosslinked, middle of chain)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>L-Alanine &lt;&gt; D-Alanine</reaction_text>
    <kegg_reaction_id>R00401</kegg_reaction_id>
    <ecocyc_id>ALARACECAT-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>D-Alanine + Pyridoxal 5'-phosphate &gt; Pyridoxamine 5'-phosphate + Pyruvic acid</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-5240</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>D-Alanine + FAD + Water &gt; FADH2 + Ammonium + Pyruvic acid</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Water + UDP-N-acetylmuramoyl-L-alanyl-D-gamma-glutamyl-meso-2,6-diaminopimelate-D-alanine &gt; D-Alanine + UDP-N-Acetylmuramoyl-L-alanyl-D-glutamyl-meso-2,6-diaminoheptanedioate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>1,6-Anhydrous-N-Acetylmuramyl-tetrapeptide + Water &gt; D-Alanine + 1,6-Anhydrous-N-Acetylmuramyl-tripeptide</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>L-Alanine-D-glutamate-meso-2,6-diaminoheptanedioate-D-alanine + Water &gt; L-alanine-D-glutamate-meso-2,6-diaminoheptanedioate + D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>N-Acetyl-D-glucosamine(anhydrous)N-Acetylmuramyl-tetrapeptide + Water &gt; D-Alanine + N-Acetyl-D-glucosamine(anhydrous)N-Acetylmuramyl-tripeptide</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>D-Alanyl-D-alanine + Water &gt;2 D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>3.4.13.22-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>Adenosine triphosphate + 2 D-Alanine &lt;&gt; ADP + Phosphate + D-Alanyl-D-alanine</reaction_text>
    <kegg_reaction_id>R01150</kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>D-Alanine + Pyridoxal 5'-phosphate &lt;&gt; Pyruvic acid + Pyridoxamine 5'-phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-5240</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>peptidoglycan tetrapeptide, glycan chain 2 + peptidoglycan tetrapeptide, glycan chain 1 &gt; peptidoglycan DAP-DAP crosslink + D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-5402</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>D-Alanyl-D-alanine + Water &gt; D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>3.4.13.22-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>a lipid II + Water  a &lt;i&gt;N&lt;/i&gt;-acetylglucosamine--&lt;i&gt;N&lt;/i&gt;-acetylmuramyl-(tetrapeptide) pyrophosphoryl-undecaprenol + D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>3.4.16.4-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>D-Alanine + Adenosine triphosphate &gt; Hydrogen ion + D-Alanyl-D-alanine + Phosphate + ADP</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>DALADALALIG-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>an electron-transfer-related quinone + Water + D-Alanine &gt; an electron-transfer-related quinol + Ammonium + Pyruvic acid</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>DALADEHYDROG-RXN</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>a peptidoglycan dimer (&lt;I&gt;meso&lt;/I&gt;-diaminopimelate containing) + Water &gt; a peptidoglycan with D,D cross-links (&lt;I&gt;meso&lt;/I&gt;-diaminopimelate containing) + Undecaprenyl diphosphate + D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN-11302</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>L-Ala-gamma-D-Glu-DAP-D-Ala + Water  L-Ala-gamma-D-Glu-Dap + D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id>RXN0-5227</ecocyc_id>
    <pw_reaction_id/>
    <reaction_text>L-Alanine &gt; D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine triphosphate + 2 D-Alanine &gt; ADP + Inorganic phosphate + D-Alanyl-D-alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>GlcNAc-MurNAc-L-alanyl-gamma-D-glutamyl-meso-diaminopimelyl-D-alanine + Water &gt; GlcNAc-MurNAc-L-alanyl-gamma-D-glutamyl-meso-diaminopimelate + D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>D-Alanyl-D-alanine + Water &lt;&gt; D-Alanine</reaction_text>
    <kegg_reaction_id>R07651 </kegg_reaction_id>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>L-Alanine + L-Alanine &lt;&gt; D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R002512</pw_reaction_id>
    <reaction_text>L-Alanine + L-Alanine &gt; D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R003732</pw_reaction_id>
    <reaction_text>2 D-Alanine + Adenosine triphosphate &gt; D-Alanyl-D-alanine + Adenosine diphosphate + Phosphate + ADP</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R002513</pw_reaction_id>
    <reaction_text>D-Alanine + Water + Quinone &gt; Ammonium + Pyruvic acid + Hydroquinone</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R002664</pw_reaction_id>
    <reaction_text>D-Alanine + Water + an electron-transfer quinone &gt; Ammonium + Pyruvic acid + electron-transfer quinol</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R003733</pw_reaction_id>
    <reaction_text> a peptidoglycan dimer (meso-diaminopimelate containing) &gt; D-Alanine + a peptidoglycan with D,D cross-links (meso-diaminopimelate containing)</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id>PW_R003455</pw_reaction_id>
    <reaction_text>2 D-Alanine + Adenosine triphosphate &lt;&gt; ADP + D-Alanyl-D-alanine + Hydrogen ion + Phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>Adenosine triphosphate + 2 D-Alanine &lt;&gt; ADP + Phosphate + D-Alanyl-D-alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>L-Alanine &lt;&gt; D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>2 D-Alanine + Adenosine triphosphate &lt;&gt; ADP + D-Alanyl-D-alanine + Hydrogen ion + Phosphate</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
    <reaction_text>L-Alanine &lt;&gt; D-Alanine</reaction_text>
    <kegg_reaction_id/>
    <ecocyc_id/>
    <pw_reaction_id/>
  </reactions>
  <concentrations>
  </concentrations>
</compound>
