Atypical stress response to temperature and NaOCl exposure leading to septation defect during cell division in Cupriavidus metallidurans CH34

作者：Arroua Boussad; Bellanger Xavier; Guilloteau Helene; Mathieu Laurence; Merlin Christophe^*

来源：FEMS Microbiology Letters, 2014, 353(1): 33-39.

DOI：10.1111/1574-6968.12399

• cell division
• Cupriavidus metallidurans CH34
• temperature-induced mutagenesis and mortality
• septation defect
• stress response

Cupriavidus metallidurans CH34 has long been known for its temperature-induced mutagenesis and mortality phenotype (TIMM), for which a genetic origin has been suggested repeatedly. In this report, we present microscopic-based evidences that the TIMM process actually starts with a septation defect, leading to aberrant cell morphologies. Moreover, the septation defect of CH34 could be induced by NaOCl, thus showing that the TIMM phenotype may be part of a more general stress response. Sequence analysis of a TIMM survivor exhibiting a recurrent recognizable lysA mutation ruled out the possibility of a genetic ground linking TIMM survival and peptidoglycan synthesis.

• 出版日期2014-4