Characterisation of the interaction of colicin A with its co-receptor TolA

Oliver Hecht, Ying Zhang, Chan Li, Christopher N. Penfold, Richard James, Geoffrey R. Moore

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6 Citations (Scopus)


Colicin A enters Escherichia coli cells through interaction with endogenous TolA and TolB proteins. In vitro, binding of the colicin A translocation domain to TolA leads to unfolding of TolA. Through NMR studies of the colicin A translocation domain and polypeptides representing the individual TolA and TolB binding epitopes of colicin A we question if the unfolding of TolA induced by colicin A is likely to be physiologically relevant. The NMR data further reveals that the colicin A binding site on TolA is different from that for colicin N which explains why there is a difference in colicin toxicity for E. coli carrying a TolA-III homologue from Yersina enterocolitica in place of its own TolA-III.
Original languageEnglish
Pages (from-to)2249-2252
Number of pages4
JournalFEBS Letters
Issue number11
Publication statusPublished - 3 Jun 2010

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