ExplorEnz: EC 6.3.2.10

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6.3.2.10

Accepted name:

UDP-N-acetylmuramoyl-tripeptide—D-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 of peptidoglycan biosynthesis (part 1), 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 6.3.2.4 (D-alanine—D-alanine ligase), EC 6.3.2.7 (UDP-N-acetylmuramoyl-L-alanyl-D-glutamate—L-lysine ligase) or EC 6.3.2.13 (UDP-N-acetylmuramoyl-L-alanyl-D-glutamate—2,6-diaminopimelate ligase), EC 6.3.2.8 (UDP-N-acetylmuramate—L-alanine ligase) and EC 6.3.2.9 (UDP-N-acetylmuramoyl-L-alanine—D-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-2,6-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 6.3.2.15, which has since been deleted.

Links to other databases:

BRENDA, EXPASY, Gene, KEGG, MetaCyc, PDB, CAS registry number: 55354-36-4

References:

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]

[EC 6.3.2.10 created 1965, modified 2002]