Pbp, a cell-surface exposed plasminogen binding protein of Bacteroides fragilis

Microbes and Infection
Robert SijbrandiBen R Otto

Abstract

The Gram-negative anaerobic bacterium B. fragilis is a member of the commensal flora of the human intestine, but is also frequently found in severe intra-abdominal infections. Several B. fragilis virulence factors have been implicated in the development of these infections. A B. fragilis protein of circa 60-kDa was identified as a putative plasminogen binding protein (Pbp). The corresponding gene was located, cloned, sequenced and the subcellular localization of the protein was investigated. Pbp was both determined in the outer membrane of B. fragilis and of E. coli that expressed the cloned protein. Protease accessibility studies showed that the protein is expressed at the cell surface. Importantly, we demonstrated that Pbp is sufficient and required for plasminogen binding to whole cells in both E. coli and B. fragilis. Pbp-like proteins were also detected in some other Bacteroides subspecies. The role of this potential B. fragilis virulence factor in pathogenicity is discussed.

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Citations

Nov 3, 2012·Journal of Biomedicine & Biotechnology·Martina L Sanderson-SmithJason D McArthur
Dec 30, 2015·Trends in Microbiology·Marlena M Wilson, Harris D Bernstein
Jul 16, 2013·International Journal of Medical Microbiology : IJMM·Eliane de Oliveira FerreiraRegina M C P Domingues
Dec 21, 2019·Journal of Molecular Biology·Ezequiel Valguarnera, Juliane Bubeck Wardenburg
Sep 21, 2020·Microbial Pathogenesis·Mina YekaniMohammad Yousef Memar
Jul 9, 2021·International Journal of Medical Microbiology : IJMM·Paweł SerekIwona Bednarz-Misa

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