Title |
Regulated proteolysis of the alternative sigma factor SigX in Streptococcus mutans: implication in the escape from competence
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Published in |
BMC Microbiology, July 2014
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DOI | 10.1186/1471-2180-14-183 |
Pubmed ID | |
Authors |
Gaofeng Dong, Xiao-Lin Tian, Zubelda A Gomez, Yung-Hua Li |
Abstract |
SigX (σX), the alternative sigma factor of Streptococcus mutans, is the key regulator for transcriptional activation of late competence genes essential for taking up exogenous DNA. Recent studies reveal that adaptor protein MecA and the protease ClpC act as negative regulators of competence by a mechanism that involves MecA-mediated proteolysis of SigX by the ClpC in S. mutans. However, the molecular detail how MecA and ClpC negatively regulate competence in this species remains to be determined. Here, we provide evidence that adaptor protein MecA targets SigX for degradation by the protease complex ClpC/ClpP when S. mutans is grown in a complex medium. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 3 | 100% |
Demographic breakdown
Type | Count | As % |
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Practitioners (doctors, other healthcare professionals) | 1 | 33% |
Members of the public | 1 | 33% |
Scientists | 1 | 33% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 1 | 4% |
United States | 1 | 4% |
Unknown | 25 | 93% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 8 | 30% |
Researcher | 5 | 19% |
Student > Master | 4 | 15% |
Student > Postgraduate | 2 | 7% |
Student > Bachelor | 2 | 7% |
Other | 4 | 15% |
Unknown | 2 | 7% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 8 | 30% |
Medicine and Dentistry | 5 | 19% |
Biochemistry, Genetics and Molecular Biology | 4 | 15% |
Immunology and Microbiology | 4 | 15% |
Pharmacology, Toxicology and Pharmaceutical Science | 1 | 4% |
Other | 2 | 7% |
Unknown | 3 | 11% |