Accepted name: UDP-N-acetylmuramoyl-tripeptideD-alanyl-D-alanine ligase
Reaction: ATP + UDP-N-acetylmuramoyl-L-alanyl-γ-D-glutamyl-L-lysine + D-alanyl-D-alanine = ADP + phosphate + UDP-N-acetylmuramoyl-L-alanyl-γ-D-glutamyl-L-lysyl-D-alanyl-D-alanine
For diagram click here.
Other name(s): MurF synthetase; UDP-N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-D-alanyl-D-alanine synthetase; UDP-N-acetylmuramoylalanyl-D-glutamyl-lysine-D-alanyl-D-alanine ligase; uridine diphosphoacetylmuramoylpentapeptide synthetase; UDPacetylmuramoylpentapeptide synthetase; UDP-MurNAc-L-Ala-D-Glu-L-Lys:D-Ala-D-Ala ligase
Systematic name: UDP-N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysine:D-alanyl-D-alanine ligase (ADP-forming)
Comments: Involved with EC 22.214.171.124 (D-alanineD-alanine ligase), EC 126.96.36.199 (UDP-N-acetylmuramoyl-L-alanyl-D-glutamateL-lysine ligase) or EC 188.8.131.52 (UDP-N-acetylmuramoyl-L-alanyl-D-glutamate2,6-diaminopimelate ligase), EC 184.108.40.206 (UDP-N-acetylmuramateL-alanine ligase) and EC 220.127.116.11 (UDP-N-acetylmuramoyl-L-alanineD-glutamate ligase) in the synthesis of a cell-wall peptide (click here for diagram).This enzyme also catalyses the reaction when the C-terminal residue of the tripeptide is meso-2,4-diaminoheptanedioate (acylated at its L-centre), linking the D-Ala-D-Ala to the carboxy group of the L-centre. This activity was previously attributed to EC 18.104.22.168, which has since been deleted.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 55354-36-4
1. Ito, E. and Strominger, J.L. Enzymatic synthesis of the peptide in bacterial uridine nucleotides. II. Enzymatic synthesis and addition of D-alanyl-D-alanine. J. Biol. Chem. 237 (1962) 2696-2703.
2. van Heijenoort, J. Recent advances in the formation of the bacterial peptidoglycan monomer unit. Nat. Prod. Rep. 18 (2001) 503-519. [PMID: 11699883]