کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9121659 1159194 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Divergent roles of RpoS in Escherichia coli under aerobic and anaerobic conditions
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
Divergent roles of RpoS in Escherichia coli under aerobic and anaerobic conditions
چکیده انگلیسی
Escherichia coli exhibited different levels of rpoS expression and general stress resistance under aerobiosis and anaerobiosis. Expression measured using reporter gene fusions and protein levels was lower under anaerobic conditions. Consistent with earlier findings, rpoS mutants were selected in aerobic nutrient-limited cultures but rpoS mutants were not enriched under anaerobiosis. This result suggested that, despite its decreased level, RpoS had a function under anaerobic conditions not essential under aerobiosis. Competition experiments between rpoS+ and rpoS bacteria confirmed the advantage conferred by RpoS under anaerobiosis. In contrast, stress resistance assays suggested RpoS made a greater contribution to general stress resistance under aerobiosis than anaerobiosis. These results indicate a significant, but different role of RpoS in aerobic and anaerobic environments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: FEMS Microbiology Letters - Volume 244, Issue 2, 15 March 2005, Pages 323-327
نویسندگان
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