ExplorEnz: EC 2.3.2.17

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2.3.2.17

Accepted name:

N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-(N⁶-glycyl)-D-alanyl-D-alanine-diphosphoundecaprenyl-N-acetylglucosamine:glycine glycyltransferase

Reaction:

MurNAc-L-Ala-D-isoglutaminyl-L-Lys-(N⁶-Gly)-D-Ala-D-Ala-diphospho-ditrans,octacis-undecaprenyl-GlcNAc + 2 glycyl-tRNA^Gly = MurNAc-L-Ala-D-isoglutaminyl-L-Lys-(N⁶-tri-Gly)-D-Ala-D-Ala-diphospho-ditrans,octacis-undecaprenyl-GlcNAc + 2 tRNA^Gly

Other name(s):

femA (gene name); N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-(N⁶-glycyl)-D-alanyl-D-alanine-ditrans,octacis-diphosphoundecaprenyl-N-acetylglucosamine:glycine glycyltransferase

Systematic name:

MurNAc-L-Ala-D-isoglutaminyl-L-Lys-(N⁶-Gly)-D-Ala-D-Ala-diphospho-ditrans,octacis-undecaprenyl-GlcNAc:glycine glycyltransferase

Comments:

This enzyme catalyses the successive transfer of two Gly moieties from charged tRNAs to MurNAc-L-Ala-D-isoglutaminyl-L-Lys-(N⁶-Gly)-D-Ala-D-Ala-diphospho-ditrans,octacis-undecaprenyl-GlcNAc, attaching them to a Gly residue previously attached by EC 2.3.2.16 (lipid II:glycine glycyltransferase) to the N⁶ of the L-Lys at position 3 of the pentapeptide. This is the second step in the synthesis of the pentaglycine interpeptide bridge that is used by Staphylococcus aureus for the crosslinking of different glycan strands to each other. The next step is catalysed by EC 2.3.2.18 (N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-(N⁶-triglycine)-D-alanyl-D-alanine-diphosphoundecaprenyl-N-acetylglucosamine:glycine glycyltransferase). This enzyme is essential for methicillin resistance [1].

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc, PDB

References:

1.	Berger-Bachi, B., Barberis-Maino, L., Strassle, A. and Kayser, F.H. FemA, a host-mediated factor essential for methicillin resistance in Staphylococcus aureus: molecular cloning and characterization. Mol. Gen. Genet. 219 (1989) 263–269. [PMID: 2559314]
2.	Johnson, S., Kruger, D. and Labischinski, H. FemA of Staphylococcus aureus: isolation and immunodetection. FEMS Microbiol. Lett. 132 (1995) 221–228. [DOI] [PMID: 7590176]
3.	Benson, T.E., Prince, D.B., Mutchler, V.T., Curry, K.A., Ho, A.M., Sarver, R.W., Hagadorn, J.C., Choi, G.H. and Garlick, R.L. X-ray crystal structure of Staphylococcus aureus FemA. Structure 10 (2002) 1107–1115. [DOI] [PMID: 12176388]
4.	Schneider, T., Senn, M.M., Berger-Bachi, B., Tossi, A., Sahl, H.G. and Wiedemann, I. In vitro assembly of a complete, pentaglycine interpeptide bridge containing cell wall precursor (lipid II-Gly₅) of Staphylococcus aureus. Mol. Microbiol. 53 (2004) 675–685. [DOI] [PMID: 15228543]

[EC 2.3.2.17 created 2010]