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Title: Inactivation of Burkholderia pseudomallei bsaQ results in decreased invasion efficiency and delayed escape of bacteria from endocytic vesicles
Authors: Veerachat Muangsombut
Supaporn Suparak
Pornpan Pumirat
Suwat Damnin
Paiboon Vattanaviboon
Visith Thongboonkerd
Sunee Korbsrisate
Mahidol University
Chulabhorn Research Institute
Keywords: Biochemistry, Genetics and Molecular Biology;Immunology and Microbiology
Issue Date: 1-Dec-2008
Citation: Archives of Microbiology. Vol.190, No.6 (2008), 623-631
Abstract: Burkholderia pseudomallei, an infectious Gram-negative bacterium, is the causative pathogen of melioidosis. In the present study, a B. pseudomallei strain with mutation in the bsaQ gene, encoding a structural component of the type III secretion system (T3SS), was constructed. This bsaQ mutation caused a marked decrease in secretion of BopE effector and BipD translocator proteins into culture supernatant. The B. pseudomallei bsaQ mutant also exhibited decreased efficiencies of plaque formation, invasion into non-phagocytic cells and multinucleated giant cell (MNGC) development in a J774A.1 macrophage cell line. Co-localization of the bacteria and lysosome-associated membrane glycoprotein-1 (LAMP-1) containing vesicles suggested that defects in MNGC formation may result from the delayed ability of this B. pseudomallei mutant to escape from the vacuoles of macrophages. © 2008 Springer-Verlag.
ISSN: 03028933
Appears in Collections:Scopus 2006-2010

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