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. 1987 May;169(5):2223–2230. doi: 10.1128/jb.169.5.2223-2230.1987

Role of AbrB in Spo0A- and Spo0B-dependent utilization of a sporulation promoter in Bacillus subtilis.

P Zuber, R Losick
PMCID: PMC212136  PMID: 2437099

Abstract

Transcription of the Bacillus subtilis gene spoVG is induced at the onset of sporulation and is dependent on the products of the stage-0 regulatory genes spo0A, spo0B, and spo0H. We show here that the dependence of spoVG transcription on Spo0A and Spo0B (but not Spo0H) can be bypassed by a mutation at abrB, a previously identified locus at which mutations that suppress some of the phenotypes of spo0A are often located, or by a cis-acting mutation within the spoVG promoter. To explain the epistatis of abrB to spo0A and spo0B mutations, we propose that AbrB acts, directly or indirectly, to block transcription of spoVG and that Spo0A and Spo0B cause inactivation of the abrB gene product(s). Spo0A-Spo0B-dependent inactivation of AbrB could be a general explanation for the pleiotropic effects of spo0A and spo0B mutations on B. subtilis gene expression.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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