A Leptospira interrogans enzyme with similarity to yeast Ste14p that methylates the 1-phosphate group of lipid A.

ABSTRACT: Distinct from other spirochetes, cells of Leptospira interrogans contain orthologues of all the Escherichia coli lpx genes required for lipid A biosynthesis, but they synthesize a modified form of lipopolysaccharide that supposedly activates toll-like receptor 2 (TLR2) instead of TLR4. The recent determination of the L. interrogans lipid A structure revealed an unprecedented O-methylation of its 1-phosphate group (Que-Gewirth, N. L. S., Ribeiro, A. A., Kalb, S. R., Cotter, R. J., Bulach, D. M., Adler, B., Saint Girons, I., Werts, C., and Raetz, C. R. H. (2004) J. Biol. Chem. 279, 25420-25429). The enzymatic activity responsible for selective 1-phosphate methylation has not been previously explored. A membrane enzyme that catalyzes the transfer of a methyl group from S-adenosylmethionine (S

SUBMITTER: Boon Hinckley M 

PROVIDER: S-EPMC2655238 | biostudies-literature | 2005 Aug

REPOSITORIES: biostudies-literature