Lipooligosaccharide is required for the generation of infectious elementary bodies in Chlamydia trachomatis.

Journal Article (Journal Article)

Lipopolysaccharides (LPS) and lipooligosaccharides (LOS) are the main lipid components of bacterial outer membranes and are essential for cell viability in most Gram-negative bacteria. Here we show that small molecule inhibitors of LpxC [UDP-3-O-(R-3-hydroxymyristoyl)-GlcNAc deacetylase], the enzyme that catalyzes the first committed step in the biosynthesis of lipid A, block the synthesis of LOS in the obligate intracellular bacterial pathogen Chlamydia trachomatis. In the absence of LOS, Chlamydia remains viable and establishes a pathogenic vacuole ("inclusion") that supports robust bacterial replication. However, bacteria grown under these conditions were no longer infectious. In the presence of LpxC inhibitors, replicative reticulate bodies accumulated in enlarged inclusions but failed to express selected late-stage proteins and transition to elementary bodies, a Chlamydia developmental form that is required for invasion of mammalian cells. These findings suggest the presence of an outer membrane quality control system that regulates Chlamydia developmental transition to infectious elementary bodies and highlights the potential application of LpxC inhibitors as unique class of antichlamydial agents.

Full Text

Duke Authors

Cited Authors

  • Nguyen, BD; Cunningham, D; Liang, X; Chen, X; Toone, EJ; Raetz, CRH; Zhou, P; Valdivia, RH

Published Date

  • June 21, 2011

Published In

Volume / Issue

  • 108 / 25

Start / End Page

  • 10284 - 10289

PubMed ID

  • 21628561

Pubmed Central ID

  • PMC3121853

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

Digital Object Identifier (DOI)

  • 10.1073/pnas.1107478108


  • eng

Conference Location

  • United States