ATP-association to intrabacterial nanotransportation system in Vibrio cholerae.

Abstract:

:Vibrio cholerae colonizes the lumen of the proximal small intestine, which has an alkaline environment, and secretes cholera toxin (CT) through a type II secretion machinery. V. cholerae possesses the intrabacterial nanotransportation system (ibNoTS) for transporting CT from the inner portion toward the peripheral portion of the cytoplasm, and this system is controlled by extrabacterial pH. Association of ATP with ibNoTS has not yet been examined in detail. In this study, we demonstrated by immunoelectron microscopy that ibNoTS of V. cholerae under the extrabacterial alkaline condition was inhibited by ATP inhibitors, 2,4-dinitrophenol (DNP), a protonophore, or 8-amino-adenosine which produces inactive form of ATP. The inhibition of CT transport can be reversed by neutralization of DNP. Those inhibitions were associated with decrease of CT secretion by which ibNoTS followed. We propose that ATP closely associates with V. cholerae ibNoTS for transporting CT.

journal_name

Med Mol Morphol

authors

Matsuzaki Y,Wu H,Nakano T,Nakahari T,Sano K

doi

10.1007/s00795-015-0105-4

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

225-34

issue

4

eissn

1860-1480

issn

1860-1499

pii

10.1007/s00795-015-0105-4

journal_volume

48

pub_type

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