ComEA, a Bacillus subtilis integral membrane protein required for genetic transformation, is needed for both DNA binding and transport.

Abstract:

:The competence-related phenotypes of mutations in each of the four open reading frames associated with the comE locus of Bacillus subtilis are described. comEA and comEC are required for transformability, whereas the products of comEB and of the overlapping comER, which is transcribed in the reverse direction, are dispensable. Loss of the comEA product decreases the binding of DNA to the competent cell surface and the internalization of DNA, in addition to exhibiting a profound effect on transformability. The comEC product is required for internalization but is dispensable for DNA binding. ComEA is shown to be an integral membrane protein, as predicted from hydropathy analysis, with its C-terminal domain outside the cytoplasmic membrane. This C-terminal domain possesses a sequence with similarity to those of several proteins known to be involved in nucleic acid transactions including UvrC and a human protein that binds to the replication origin of the Epstein-Barr virus.

journal_name

J Bacteriol

journal_title

Journal of bacteriology

authors

Inamine GS,Dubnau D

doi

10.1128/jb.177.11.3045-3051.1995

subject

Has Abstract

pub_date

1995-06-01 00:00:00

pages

3045-51

issue

11

eissn

0021-9193

issn

1098-5530

journal_volume

177

pub_type

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