2.0 2012-05-31 14:31:23 -0600 2015-06-03 17:19:27 -0600 ECMDB20173 M2MDB001020 MurAc(oyl-L-Ala-D-gamma-Glu-L-Lys-D-Ala-D-Ala)-diphospho-undecaprenol Murac(oyl-L-ala-D-gamma-glu-L-lys-D-ala-D-ala)-diphospho-undecaprenol is a polyprenol compound involved in the synthesis of peptidoglycan. It is a substrate for the enzyme UDP-N-acetylglucosamine--N-acetylmuramyl-(pentapeptide) pyrophosphoryl-undecaprenol N-acetylglucosamine transferase (murG). This enzyme catalyzes the transfer of a GlcNAc subunit on undecaprenyl-pyrophosphoryl-MurNAc-pentapeptide (lipid intermediate I) to form undecaprenyl-pyrophosphoryl-MurNAc-(pentapeptide)GlcNAc (lipid intermediate II). Peptidoglycan is best described as a fisherman net. The mesh of the net is made of two segments of parallel, rather inextensible glycan threads, held together by two small elastic peptide crosslinks allowing the net to expand or shrink. The glycan moiety of the peptidoglycan is remarkably uniform among all bacteria, and is made up of alternating β-1,4-linked N-acetylglucosamine and N-acetyl muramate residues, with an average chain length (in different organisms) of 10 to 65 disaccharide units. The peptidoglycan synthesis pathway starts at the cytoplasm, where in six steps the peptidoglycan precursor a UDP-N-acetylmuramoyl-pentapeptide is synthesized. This precursor is then attached to the memberane acceptor all-trans-undecaprenyl phosphate, generating a N-acetylmuramoyl-pentapeptide-diphosphoundecaprenol, also known as lipid I. Another transferase then adds UDP-N-acetyl-α-D-glucosamine, yielding the complete monomeric unit a lipid II, also known as lipid II. This final lipid intermediate is transferred by an as yet unknown mechanism through the membrane. The peptidoglycan monomers are then polymerized on the outside surface by glycosyltransferases, which form the linear glycan chains, and transpeptidases, which catalyze the formation of peptide crosslinks. Peptide crosslinks form between different parts of the peptides depending on the organism. For example, in Mycobacteria and in E. coli most links form between the carboxyl group of the penultimate D-alanine (residue 4) of one peptide to the amino group at the D-center of meso-diaminopimelate (residue 3) of an adjacent peptide of a second glycan chain (as in E. coli). The crosslinking reaction is catalyzed by transpeptidases and involves the cleavage of the D-alanyl-D-alanine bond of the donor peptide, providing the energy to drive the reaction. As a result, the peptides in the peptidoglycan polymers are one or two amino acids shorter than the peptides in the monomers. MurAc(oyl-L-ala-D-g-glu-L-lys-D-ala-D-ala)-diphospho-undecaprenol MurAc(oyl-L-ala-D-γ-glu-L-lys-D-ala-D-ala)-diphospho-undecaprenol C86H143N7O21P2 1673.0374 1671.981227697 (2R)-4-{[(1S)-5-amino-1-{[(1R)-1-{[(1R)-1-carboxyethyl]-C-hydroxycarbonimidoyl}ethyl]-C-hydroxycarbonimidoyl}pentyl]-C-hydroxycarbonimidoyl}-2-{[(2S)-1-hydroxy-2-[(1-hydroxy-2-{[(2R,3S,4R,5R,6R)-3-hydroxy-6-{[hydroxy({[hydroxy({[(2E,6E,10E,14E,18E,22E,26E,30E,34E,38E)-3,7,11,15,19,23,27,31,35,39,43-undecamethyltetratetraconta-2,6,10,14,18,22,26,30,34,38,42-undecaen-1-yl]oxy})phosphoryl]oxy})phosphoryl]oxy}-5-[(1-hydroxyethylidene)amino]-2-(hydroxymethyl)oxan-4-yl]oxy}propylidene)amino]propylidene]amino}butanoic acid (2R)-4-{[(1S)-5-amino-1-{[(1R)-1-{[(1R)-1-carboxyethyl]-C-hydroxycarbonimidoyl}ethyl]-C-hydroxycarbonimidoyl}pentyl]-C-hydroxycarbonimidoyl}-2-{[(2S)-1-hydroxy-2-[(1-hydroxy-2-{[(2R,3S,4R,5R,6R)-3-hydroxy-6-{[hydroxy({hydroxy[(2E,6E,10E,14E,18E,22E,26E,30E,34E,38E)-3,7,11,15,19,23,27,31,35,39,43-undecamethyltetratetraconta-2,6,10,14,18,22,26,30,34,38,42-undecaen-1-yl]oxyphosphoryl}oxy)phosphoryl]oxy}-5-[(1-hydroxyethylidene)amino]-2-(hydroxymethyl)oxan-4-yl]oxy}propylidene)amino]propylidene]amino}butanoic acid NCCCC[C@]([H])(N=C(O)CC[C@@]([H])(N=C(O)[C@@](C)([H])N=C(O)C(C)([H])O[C@@]1([H])[C@@](O)([H])[C@@]([H])(CO)O[C@]([H])(OP(O)(=O)OP(O)(=O)OC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CCC=C(C)C)[C@]1([H])N=C(C)O)C(=O)O)C(O)=N[C@@](C)([H])C(O)=N[C@@](C)([H])C(=O)O InChI=1S/C86H143N7O21P2/c1-57(2)30-20-31-58(3)32-21-33-59(4)34-22-35-60(5)36-23-37-61(6)38-24-39-62(7)40-25-41-63(8)42-26-43-64(9)44-27-45-65(10)46-28-47-66(11)48-29-49-67(12)53-55-110-115(106,107)114-116(108,109)113-86-77(91-72(17)95)79(78(97)75(56-94)112-86)111-71(16)82(100)88-69(14)81(99)93-74(85(104)105)51-52-76(96)92-73(50-18-19-54-87)83(101)89-68(13)80(98)90-70(15)84(102)103/h30,32,34,36,38,40,42,44,46,48,53,68-71,73-75,77-79,86,94,97H,18-29,31,33,35,37,39,41,43,45,47,49-52,54-56,87H2,1-17H3,(H,88,100)(H,89,101)(H,90,98)(H,91,95)(H,92,96)(H,93,99)(H,102,103)(H,104,105)(H,106,107)(H,108,109)/b58-32+,59-34+,60-36+,61-38+,62-40+,63-42+,64-44+,65-46+,66-48+,67-53+/t68-,69+,70-,71?,73+,74-,75-,77-,78-,79-,86-/m1/s1 SULOOAFLXMQJSF-SZSYZMFDSA-N Inner membrane Membrane Outer membrane logp 4.06 ALOGPS logs -6.11 ALOGPS solubility 1.30e-03 g/l ALOGPS logp 15.76 ChemAxon pka_strongest_acidic 1.71 ChemAxon pka_strongest_basic 10.21 ChemAxon iupac (2R)-4-{[(1S)-5-amino-1-{[(1R)-1-{[(1R)-1-carboxyethyl]-C-hydroxycarbonimidoyl}ethyl]-C-hydroxycarbonimidoyl}pentyl]-C-hydroxycarbonimidoyl}-2-{[(2S)-1-hydroxy-2-[(1-hydroxy-2-{[(2R,3S,4R,5R,6R)-3-hydroxy-6-{[hydroxy({[hydroxy({[(2E,6E,10E,14E,18E,22E,26E,30E,34E,38E)-3,7,11,15,19,23,27,31,35,39,43-undecamethyltetratetraconta-2,6,10,14,18,22,26,30,34,38,42-undecaen-1-yl]oxy})phosphoryl]oxy})phosphoryl]oxy}-5-[(1-hydroxyethylidene)amino]-2-(hydroxymethyl)oxan-4-yl]oxy}propylidene)amino]propylidene]amino}butanoic acid ChemAxon average_mass 1673.0374 ChemAxon mono_mass 1671.981227697 ChemAxon smiles NCCCC[C@]([H])(N=C(O)CC[C@@]([H])(N=C(O)[C@@](C)([H])N=C(O)C(C)([H])O[C@@]1([H])[C@@](O)([H])[C@@]([H])(CO)O[C@]([H])(OP(O)(=O)OP(O)(=O)OC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CC\C([H])=C(/C)CCC=C(C)C)[C@]1([H])N=C(C)O)C(=O)O)C(O)=N[C@@](C)([H])C(O)=N[C@@](C)([H])C(=O)O ChemAxon formula C86H143N7O21P2 ChemAxon inchi InChI=1S/C86H143N7O21P2/c1-57(2)30-20-31-58(3)32-21-33-59(4)34-22-35-60(5)36-23-37-61(6)38-24-39-62(7)40-25-41-63(8)42-26-43-64(9)44-27-45-65(10)46-28-47-66(11)48-29-49-67(12)53-55-110-115(106,107)114-116(108,109)113-86-77(91-72(17)95)79(78(97)75(56-94)112-86)111-71(16)82(100)88-69(14)81(99)93-74(85(104)105)51-52-76(96)92-73(50-18-19-54-87)83(101)89-68(13)80(98)90-70(15)84(102)103/h30,32,34,36,38,40,42,44,46,48,53,68-71,73-75,77-79,86,94,97H,18-29,31,33,35,37,39,41,43,45,47,49-52,54-56,87H2,1-17H3,(H,88,100)(H,89,101)(H,90,98)(H,91,95)(H,92,96)(H,93,99)(H,102,103)(H,104,105)(H,106,107)(H,108,109)/b58-32+,59-34+,60-36+,61-38+,62-40+,63-42+,64-44+,65-46+,66-48+,67-53+/t68-,69+,70-,71?,73+,74-,75-,77-,78-,79-,86-/m1/s1 ChemAxon inchikey SULOOAFLXMQJSF-SZSYZMFDSA-N ChemAxon polar_surface_area 457.37 ChemAxon refractivity 463.45 ChemAxon polarizability 188.57 ChemAxon rotatable_bond_count 59 ChemAxon acceptor_count 25 ChemAxon donor_count 13 ChemAxon physiological_charge -3 ChemAxon formal_charge 0 ChemAxon Peptidoglycan biosynthesis ec00550 Specdb::MsMs 29207 Specdb::MsMs 29208 Specdb::MsMs 29209 Specdb::MsMs 35765 Specdb::MsMs 35766 Specdb::MsMs 35767 23724480 C04851 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. 22080510 Phospho-N-acetylmuramoyl-pentapeptide-transferase P0A6W3 MRAY_ECOLI mraY http://ecmdb.ca/proteins/P0A6W3.xml UDP-N-acetylglucosamine--N-acetylmuramyl-(pentapeptide) pyrophosphoryl-undecaprenol N-acetylglucosamine transferase P17443 MURG_ECOLI murG http://ecmdb.ca/proteins/P17443.xml UDP-N-Acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-D-alanyl-D-alanine + Di-trans,poly-cis-undecaprenyl phosphate + UDP-Mur2Ac(oyl-L-Ala-gamma-D-Glu-L-Lys-D-Ala-D-Ala) <> Uridine 5'-monophosphate + MurAc(oyl-L-Ala-D-gamma-Glu-L-Lys-D-Ala-D-Ala)-diphospho-undecaprenol + Mur2Ac(oyl-L-Ala-gamma-D-Glu-L-Lys-D-Ala-D-Ala)-diphosphoundecaprenol R05629 MurAc(oyl-L-Ala-D-gamma-Glu-L-Lys-D-Ala-D-Ala)-diphospho-undecaprenol + Uridine diphosphate-N-acetylglucosamine <> Undecaprenyl-diphospho-N-acetylmuramoyl-(N-acetylglucosamine)-L-alanyl-gamma-D-glutamyl-L-lysyl-D-alanyl-D-alanine + Uridine 5'-diphosphate R05662