Lipolysis-stimulated Lipoprotein Receptor (LSR) is the Host Receptor for the Binary Toxin Clostridium Difficile Transferase (CDT)

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2011 Sep 21

PMID 21930894

Citations 107

Authors

Panagiotis Papatheodorou

Jan E Carette

George W Bell

Carsten Schwan

Gregor Guttenberg

Thijn R Brummelkamp

Klaus Aktories

Affiliations

Soon will be listed here.

Abstract

Clostridium difficile infection (CDI) causes antibiotic-associated diarrhea and pseudomembranous colitis. Hypervirulent strains of the pathogen, which are responsible for increased morbidity and mortality of CDI, produce the binary actin-ADP ribosylating toxin Clostridium difficile transferase (CDT) in addition to the Rho-glucosylating toxins A and B. CDT depolymerizes the actin cytoskeleton, increases adherence and colonization of Clostridia by induction of microtubule-based cell protrusions and, eventually, causes death of target cells. Using a haploid genetic screen, we identified the lipolysis-stimulated lipoprotein receptor as the membrane receptor for CDT uptake by target cells. Moreover, we show that Clostridium perfringens iota toxin, which is a related binary actin-ADP ribosylating toxin, enters target cells via the lipolysis-stimulated lipoprotein receptor. Identification of the toxin receptors is essential for understanding of the toxin uptake and provides a most valuable basis for antitoxin strategies.

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