Journal article

Uptake across the cell envelope and insertion into the inner membrane of ion channel-forming colicins in E coli.

D Baty, F Pattus, M Parker, H Benedetti, M Frenette, JP Bourdineaud, D Cavard, M Knibiehler, C Lazdunski

Biochimie | Published : 1990

Abstract

Pore-forming colicins exert their lethal effect on E coli through formation of a voltage-dependent channel in the inner (cytoplasmic-membrane) thus destroying the energy potential of sensitive cells. Their mode of action appears to involve 3 steps: i) binding to a specific receptor located in the outer membrane; ii) translocation across this membrane; iii) insertion into the inner membrane. Colicin A has been used as a prototype of pore-forming colicins. In this review, the 3 functional domains of colicin A respectively involved in receptor binding, translocation and pore formation, are defined. The components of sensitive cells implicated in colicin uptake and their interactions with the va..

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