Journal
FEMS MICROBIOLOGY LETTERS
Volume 252, Issue 1, Pages 1-10Publisher
OXFORD UNIV PRESS
DOI: 10.1016/j.femsle.2005.08.036
Keywords
bacterial pathogenesis; EPEC; Salmonella; Shigella; type III secretion; Yersinia
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Type III secretion (T3S) is an export pathway used by Gram-negative pathogenic bacteria to inject bacterial proteins into the cytosol of eukaryotic host cells. This pathway is characterized by (i) a secretion nanomachine related to the bacterial flagellum, but usually topped by a stiff needle-like structure; (ii) the assembly in the eukaryotic cell membrane of a translocation pore formed by T3S substrates; (iii) a non-cleavable N-terminal secretion signal; (iv) T3S chaperones, assisting the secretion of some substrates; (v) a control mechanism ensuring protein delivery at the right place and time. Here, we review these different aspects focusing in open questions that promise exciting findings in the near future. (c) 2005 Published by Elsevier B.V. on behalf of the Federation of European Microbiological Societies.
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