NDLI: A Spore Coat Protein, CotS, of Bacillus subtilis Is Synthesized under the Regulation of ςK and GerE during Development and Is Located in the Inner Coat Layer of Spores

Content Provider	PubMed Central
Author	Takamatsu, Hiromu Chikahiro, Yukari Kodama, Takeko Koide, Hidekatsu Kozuka, Satoshi Tochikubo, Kunio Watabe, Kazuhito
Copyright Year	1998
Abstract	The spore coat of Bacillus subtilis has a unique morphology and consists of polypeptides of different sizes, whose synthesis and assembly are precisely regulated by a cascade of transcription factors and regulatory proteins. We examined the factors that regulate cotS gene expression and CotS assembly into the coat layer of B. subtilis by Northern blot and Western blot analysis. Transcription of cotS mRNA was not detected in sporulating cells of ςK and gerE mutants by Northern blot analysis. By Western blot analysis using anti-CotS antibody, CotS was first detected in protein samples solubilized from wild-type cells at 5 h after the start of sporulation. CotS was not detected in the vegetative cells and spores of a gerE mutant or in the spores of mutants deficient in ςE, ςF, ςG, or ςK. CotS was detected in the sporangium but not in the spores of a cotE mutant. The sequence of the promoter region of cotS was similar to the consensus sequences for binding of ςK and GerE. These results demonstrate that ςK and GerE are required for cotS expression and that CotE is essential for the assembly of CotS in the coat. Immunoelectron microscopic observation using anti-CotS antibody revealed that CotS is located within the spore coat, in particular in the inner coats of dormant spores.
Starting Page	2968
File Format	PDF
ISSN	10985530
e-ISSN	10985530
Journal	Journal of Bacteriology
Issue Number	11
Volume Number	180
Language	English
Publisher	American Society for Microbiology
Publisher Date	1998-06-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Molecular Biology Microbiology

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