Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2009 Nov;55(11):1328-34.
doi: 10.1139/w09-082.

Phosphatidylcholine in membrane of Escherichia coli changes bacterial antigenicity

Fan Chen  1 , Qiong Zhao, Xueli Cai, Luchao Lv, Wen Lin, Xuejin Yu, Changyu Li, Yang Li, Min Xiong, Xing-Guo Wang
Affiliations

Phosphatidylcholine in membrane of Escherichia coli changes bacterial antigenicity

Fan Chen et al. Can J Microbiol. 2009 Nov.

Abstract

This study reports that Escherichia coli phosphatidylcholine-positive (PC+) strain Top10/ptac66 (PC+ PE+), in which borrelial PC synthase (PCS) directly condenses exogenous choline with CDP-diacylglycerol (CDP-DAG) to form PC, displayed not only stronger resistance to antimicrobial peptides cecropin P1 and indolicidin, but also decreased ability to attract macrophages to the abdominal cavity of infected mice in the 36 h following infection, compared with the control strain Top10/ptac85 (PC- PE+). Rabbit sera raised against the PC+ strains Top10/ptac66 (PC+ PE+) and AD93/ptac67 (PC+ PE-) recognized a different set of periplasmic proteins and lipopolysaccharides,compared with those detected by antisera to the PC- strains Top10/ptac85 and AD93 (PC- PE-) . Electron microscopy also showed that the morphology of cell wall of Top10/ptac66 was different from that of the control strain Top10/ptac85. Enhancement of bacterial resistance to antimicrobe peptides, alteration of bacterial antigenicity and evasion of macrophage attacks in mice suggest that PC in the bacterial membrane may play a role in bacterial evasion of the innate or adaptive immune response of the host.

PubMed Disclaimer

Similar articles

See all similar articles

Cited by

Publication types

MeSH terms

Substances

LinkOut - more resources