The Enzyme Database

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Accepted name: N-acetylglucosaminyl-diphospho-decaprenol L-rhamnosyltransferase
Reaction: dTDP-6-deoxy-β-L-mannose + N-acetyl-α-D-glucosaminyl-diphospho-trans,octacis-decaprenol = dTDP + α-L-rhamnopyranosyl-(1→3)-N-acetyl-α-D-glucosaminyl-diphospho-trans,octacis-decaprenol
For diagram of galactofuranan biosynthesis, click here
Glossary: dTDP-6-deoxy-β-L-mannose = dTDP-4-β-L-rhamnose
Other name(s): WbbL
Systematic name: dTDP-6-deoxy-β-L-mannose:N-acetyl-α-D-glucosaminyl-diphospho-trans,octacis-decaprenol 3-α-L-rhamnosyltransferase
Comments: Requires Mn2+ or Mg2+. Isolated from Mycobacterium smegmatis [1] and Mycobacterium tuberculosis [2]. The enzyme catalyses the addition of a rhamnosyl unit to N-acetyl-α-D-glucosaminyl-diphospho-trans,octacis-decaprenol, completing the synthesis of the linkage unit that attaches the arabinogalactan moiety to the peptidoglycan moiety in Mycobacterial cell wall.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Mills, J.A., Motichka, K., Jucker, M., Wu, H.P., Uhlik, B.C., Stern, R.J., Scherman, M.S., Vissa, V.D., Pan, F., Kundu, M., Ma, Y.F. and McNeil, M. Inactivation of the mycobacterial rhamnosyltransferase, which is needed for the formation of the arabinogalactan-peptidoglycan linker, leads to irreversible loss of viability. J. Biol. Chem. 279 (2004) 43540–43546. [PMID: 15294902]
2.  Grzegorzewicz, A.E., Ma, Y., Jones, V., Crick, D., Liav, A. and McNeil, M.R. Development of a microtitre plate-based assay for lipid-linked glycosyltransferase products using the mycobacterial cell wall rhamnosyltransferase WbbL. Microbiology 154 (2008) 3724–3730. [PMID: 19047740]
[EC created 2012]

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