ExplorEnz: EC 4.2.1.126

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4.2.1.126

Accepted name:

N-acetylmuramic acid 6-phosphate etherase

Reaction:

(R)-lactate + N-acetyl-D-glucosamine 6-phosphate = N-acetylmuramate 6-phosphate + H₂O

Other name(s):

MurNAc-6-P etherase; MurQ

Systematic name:

(R)-lactate hydro-lyase (adding N-acetyl-D-glucosamine 6-phosphate; N-acetylmuramate 6-phosphate-forming)

Comments:

This enzyme, along with EC 2.7.1.170, anhydro-N-acetylmuramic acid kinase, is required for the utilization of anhydro-N-acetylmuramic acid in proteobacteria. The substrate is either imported from the medium or derived from the bacterium’s own cell wall murein during cell wall recycling.

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc, PDB

References:

1.	Jaeger, T., Arsic, M. and Mayer, C. Scission of the lactyl ether bond of N-acetylmuramic acid by Escherichia coli "etherase". J. Biol. Chem. 280 (2005) 30100–30106. [DOI] [PMID: 15983044]
2.	Uehara, T., Suefuji, K., Valbuena, N., Meehan, B., Donegan, M. and Park, J.T. Recycling of the anhydro-N-acetylmuramic acid derived from cell wall murein involves a two-step conversion to N-acetylglucosamine-phosphate. J. Bacteriol. 187 (2005) 3643–3649. [DOI] [PMID: 15901686]
3.	Uehara, T., Suefuji, K., Jaeger, T., Mayer, C. and Park, J.T. MurQ etherase is required by Escherichia coli in order to metabolize anhydro-N-acetylmuramic acid obtained either from the environment or from its own cell wall. J. Bacteriol. 188 (2006) 1660–1662. [DOI] [PMID: 16452451]
4.	Hadi, T., Dahl, U., Mayer, C. and Tanner, M.E. Mechanistic studies on N-acetylmuramic acid 6-phosphate hydrolase (MurQ): an etherase involved in peptidoglycan recycling. Biochemistry 47 (2008) 11547–11558. [DOI] [PMID: 18837509]
5.	Jaeger, T. and Mayer, C. N-acetylmuramic acid 6-phosphate lyases (MurNAc etherases): role in cell wall metabolism, distribution, structure, and mechanism. Cell. Mol. Life Sci. 65 (2008) 928–939. [DOI] [PMID: 18049859]

[EC 4.2.1.126 created 2011]