Rhea - reaction knowledgebase

Enzymes

UniProtKB ^help_outline	7,854 proteins
Enzyme class ^help_outline	EC 6.3.2.45 UDP-N-acetylmuramate L-alanyl-gamma-D-glutamyl-meso-2,6-diaminoheptanedioate ligase
GO Molecular Function ^help_outline	GO:0106418 UDP-N-acetylmuramate-L-alanyl-gamma-D-glutamyl-meso-2,6-diaminoheptanedioate ligase activity

Reaction participants Show >> << Hide

Name ^help_outline UDP-N-acetyl-α-D-muramate Identifier CHEBI:70757 Charge -3 Formula C20H28N3O19P2 InChIKey^help_outline NQBRVZNDBBMBLJ-MQTLHLSBSA-K SMILES^help_outline C[C@@H](O[C@H]1[C@H](O)[C@@H](CO)O[C@H](OP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2ccc(=O)[nH]c2=O)[C@@H]1NC(C)=O)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 4 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Name ^help_outline L-alanyl-γ-D-glutamyl-meso-diaminoheptanedioate Identifier CHEBI:61401 Charge -1 Formula C15H25N4O8 InChIKey^help_outline FMNCPUGORYYCEM-AXTSPUMRSA-M SMILES^help_outline C[C@H]([NH3+])C(=O)N[C@H](CCC(=O)N[C@H](CCC[C@H]([NH3+])C([O-])=O)C([O-])=O)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 5 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Name ^help_outline ATP Identifier CHEBI:30616 (Beilstein: 3581767) ^help_outline Charge -4 Formula C10H12N5O13P3 InChIKey^help_outline ZKHQWZAMYRWXGA-KQYNXXCUSA-J SMILES^help_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,284 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Name ^help_outline UDP-N-acetyl-α-D-muramoyl-L-alanyl-γ-D-glutamyl-meso-2,6-diaminoheptanedioate Identifier CHEBI:83905 Charge -4 Formula C35H51N7O26P2 InChIKey^help_outline QUHLBZKCGUXHGP-BHBBPGSKSA-J SMILES^help_outline C[C@H](NC(=O)[C@@H](C)O[C@H]1[C@H](O)[C@@H](CO)O[C@H](OP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2ccc(=O)[nH]c2=O)[C@@H]1NC(C)=O)C(=O)N[C@H](CCC(=O)N[C@@H](CCC[C@@H]([NH3+])C([O-])=O)C([O-])=O)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 3 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Name ^help_outline ADP Identifier CHEBI:456216 (Beilstein: 3783669) ^help_outline Charge -3 Formula C10H12N5O10P2 InChIKey^help_outline XTWYTFMLZFPYCI-KQYNXXCUSA-K SMILES^help_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])([O-])=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 841 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Name ^help_outline phosphate Identifier CHEBI:43474 Charge -2 Formula HO4P InChIKey^help_outline NBIIXXVUZAFLBC-UHFFFAOYSA-L SMILES^help_outline OP([O-])([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 1,002 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Name ^help_outline H⁺ Identifier CHEBI:15378 Charge 1 Formula H InChIKey^help_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILES^help_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,521 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule

Cross-references

	RHEA:29563	RHEA:29564	RHEA:29565	RHEA:29566
Reaction direction	undefined	left-to-right	right-to-left	bidirectional
UniProtKB ^help_outline	7,854 proteins
EC numbers ^help_outline	6.3.2.45
Gene Ontology ^help_outline	GO:0106418
KEGG ^help_outline				R10901
MetaCyc ^help_outline		RXN0-2361
EcoCyc ^help_outline		RXN0-2361

Publications

Biochemical characterization and physiological properties of Escherichia coli UDP-N-acetylmuramate:L-alanyl-gamma-D-glutamyl-meso-diaminopimelate ligase.

Herve M., Boniface A., Gobec S., Blanot D., Mengin-Lecreulx D.

The UDP-N-acetylmuramate:L-alanyl-gamma-D-glutamyl-meso-diaminopimelate ligase (murein peptide ligase [Mpl]) is known to be a recycling enzyme allowing reincorporation into peptidoglycan (murein) of the tripeptide L-alanyl-gamma-D-glutamyl-meso-diaminopimelate released during the maturation and co ... >> More

The UDP-N-acetylmuramate:L-alanyl-gamma-D-glutamyl-meso-diaminopimelate ligase (murein peptide ligase [Mpl]) is known to be a recycling enzyme allowing reincorporation into peptidoglycan (murein) of the tripeptide L-alanyl-gamma-D-glutamyl-meso-diaminopimelate released during the maturation and constant remodeling of this bacterial cell wall polymer that occur during cell growth and division. Mpl adds this peptide to UDP-N-acetylmuramic acid, thereby providing an economical additional source of UDP-MurNAc-tripeptide available for de novo peptidoglycan biosynthesis. The Mpl enzyme from Escherichia coli was purified to homogeneity as a His-tagged form, and its kinetic properties and parameters were determined. Mpl was found to accept tri-, tetra-, and pentapeptides as substrates in vitro with similar efficiencies, but it accepted the dipeptide L-Ala-D-Glu and L-Ala very poorly. Replacement of meso-diaminopimelic acid by L-Lys resulted in a significant decrease in the catalytic efficacy. The effects of disruption of the E. coli mpl gene and/or the ldcA gene encoding the LD-carboxypeptidase on peptidoglycan metabolism were investigated. The differences in the pools of UDP-MurNAc peptides and of free peptides between the wild-type and mutant strains demonstrated that the recycling activity of Mpl is not restricted to the tripeptide and that tetra- and pentapeptides are also directly reused by this process in vivo. The relatively broad substrate specificity of the Mpl ligase indicates that it is an interesting potential target for antibacterial compounds. << Less

J. Bacteriol. 189:3987-3995(2007) [PubMed] [EuropePMC]
Identification of the mpl gene encoding UDP-N-acetylmuramate: L-alanyl-gamma-D-glutamyl-meso-diaminopimelate ligase in Escherichia coli and its role in recycling of cell wall peptidoglycan.

Mengin-Lecreulx D., van Heijenoort J., Park J.T.

A gene, mpl, encoding UDP-N-acetylmuramate:L-alanyl-gamma-D-glutamyl-meso-diaminopimelat e ligase was recognized by its amino acid sequence homology with murC as the open reading frame yjfG present at 96 min on the Escherichia coli map. The existence of such an enzymatic activity was predicted fro ... >> More

A gene, mpl, encoding UDP-N-acetylmuramate:L-alanyl-gamma-D-glutamyl-meso-diaminopimelat e ligase was recognized by its amino acid sequence homology with murC as the open reading frame yjfG present at 96 min on the Escherichia coli map. The existence of such an enzymatic activity was predicted from studies indicating that reutilization of the intact tripeptide L-alanyl-gamma-D-glutamyl-meso-diaminopimelate occurred and accounted for well over 30% of new cell wall synthesis. Murein tripeptide ligase activity could be demonstrated in crude extracts, and greatly increased activity was produced when the gene was cloned and expressed under control of the trc promoter. A null mutant totally lacked activity but was viable, showing that the enzyme is not essential for growth. << Less

J. Bacteriol. 178:5347-5352(1996) [PubMed] [EuropePMC]

RHEA:29563 UDP-N-acetyl-alpha-D-muramate + L-alanyl-gamma-D-glutamyl-meso-diaminoheptanedioate + ATP = UDP-N-acetyl-alpha-D-muramoyl-L-alanyl-gamma-D-glutamyl-meso-2,6-diaminoheptanedioate + ADP + phosphate + H(+)

Enzymes

Reaction participants Show >> << Hide

Cross-references

Publications

Biochemical characterization and physiological properties of Escherichia coli UDP-N-acetylmuramate:L-alanyl-gamma-D-glutamyl-meso-diaminopimelate ligase.

Identification of the mpl gene encoding UDP-N-acetylmuramate: L-alanyl-gamma-D-glutamyl-meso-diaminopimelate ligase in Escherichia coli and its role in recycling of cell wall peptidoglycan.