Reaction: N-acetylmuramoyl-L-alanyl-D-isoglutaminyl-L-lysyl-(N6-triglycyl)-D-alanyl-D-alanine-diphospho-ditrans,octacis-undecaprenyl-N-acetylglucosamine + 2 glycyl-tRNA = N-acetylmuramoyl-L-alanyl-D-isoglutaminyl-L-lysyl-(N6-pentaglycyl)-D-alanyl-D-alanine-diphospho-ditrans,octacis-undecaprenyl-N-acetylglucosamine + 2 tRNA
Other name(s): femB (gene name)
Systematic name: N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-(N6-triglycine)-D-alanyl-D-alanine-ditrans,octacis-diphosphoundecaprenyl-N-acetylglucosamine:glycine glycyltransferase
Comments: This Staphylococcus aureus enzyme catalyses the successive transfer of two glycine moieties from charged tRNAs to N-acetylmuramoyl-L-alanyl-D-isoglutaminyl-L-lysyl-(N6-triglycyl)-D-alanyl-D-alanine-diphosphoundecaprenyl-N-acetylglucosamine, attaching them to the three glycine molecules that were previously attached to the N6 of the L-lysine at position 3 of the pentapeptide by EC 2.3.2.16 (lipid II:glycine glycyltransferase) and EC 2.3.2.17 (N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-(N6-glycyl)-D-alanyl-D-alanine-diphosphoundecaprenyl-N-acetylglucosamine:glycine glycyltransferase). This is the last step in the synthesis of the pentaglycine interpeptide bridge that is used in this organism for the crosslinking of different glycan strands to each other.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:
References:
1. Ehlert, K., Schroder, W. and Labischinski, H. Specificities of FemA and FemB for different glycine residues: FemB cannot substitute for FemA in staphylococcal peptidoglycan pentaglycine side chain formation. J. Bacteriol. 179 (1997) 7573-7576. [PMID: 9393725]
2. Rohrer, S. and Berger-Bachi, B. Application of a bacterial two-hybrid system for the analysis of protein-protein interactions between FemABX family proteins. Microbiology 149 (2003) 2733-2738. [PMID: 14523106]
3. 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. [PMID: 15228543]