Document Detail

Physiological role of carbon dioxide in spore germination of Clostridium perfringens S40.
MedLine Citation:
PMID:  19914579     Owner:  NLM     Status:  In-Process    
Germination of Clostridium perfringens is known to be triggered by nutrients such as l-alanine and inosine, and facilitated by CO2, however the role of CO2 has not been fully understood. During the studies of the germination-specific protease GSP, we found that CO2 could be replaced by bicarbonate or weakly acidic pH (pH 6.0-6.5). We also found that the spores obtained from the C. perfringens S40 overproducing GSP could germinate without CO2. Moreover, the spores could germinate in the absence of nutrients, when the spores were incubated with bicarbonate or under weakly acidic pH. GSP, which might consist of three homologous proteases, CspA, CspB, and CspC, is one of the key enzymes involved in the spore germination, and converts the pre-mature form of the spore cortex-lytic enzyme, SleC, to the mature form. Maturation of SleC in the spores obtained from the mother strain of C. perfringens S40 requires nutrients plus bicarbonate or weakly acidic pH. In contrast, mature SleC was found in the spores obtained from the cells overpoducing GSP, when the spores were treated by nutrients, bicarbonate or weakly acidic pH. Each nutrients, bicarbonate and weakly acidic pH can trigger the germination of the spores obtained from C. perfringens cells overproducing GSP.
Shiro Kato; Atsushi Masayama; Tohru Yoshimura; Hisashi Hemmi; Hidenori Tsunoda; Tomoko Kihara; Ryuichi Moriyama
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Publication Detail:
Type:  Journal Article     Date:  2009-07-14
Journal Detail:
Title:  Journal of bioscience and bioengineering     Volume:  108     ISSN:  1347-4421     ISO Abbreviation:  J. Biosci. Bioeng.     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-11-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100888800     Medline TA:  J Biosci Bioeng     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  477-83     Citation Subset:  IM    
Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan.
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