A putative prokaryote voltage-gated Ca(2+) channel with only one 6TM motif per subunit.

Abstract:

:Until now, voltage-gated Ca(2+) channel proteins have been found only in eukaryotes. Here we report that a gene recently discovered in the eubacterium Bacillus halodurans codes for a protein closely related to eukaryotic Ca(2+) channels, but that has only one 6-transmembrane-segement (6TM) motif, instead of four, in its pore-forming subunit. This is supported by the comparison of consensus sequences, which, along with the patterns of residue conservation, indicates a similar structure in the membrane to voltage-gated K(+) channels. From this we hypothesize that Ca(2+) channels originally evolved in bacteria, and that the specific eubacteria protein highlighted here is an ideal candidate for structure determination efforts.

authors

Durell SR,Guy HR

doi

10.1006/bbrc.2001.4408

subject

Has Abstract

pub_date

2001-03-02 00:00:00

pages

741-6

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(01)94408-0

journal_volume

281

pub_type

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