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논문 기본 정보
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- 한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제19권 제12호
- 발행연도
- 2009.1
- 수록면
- 1,527 - 1,535 (9page)
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Polyphosphate (polyP) plays diverse physiological functions
in prokaryotes and eukaryotes, but most of their detailed
mechanisms are still obscure. Here, we show that deletion
of polyphosphate kinase (PPK), the principal enzyme
responsible for synthesis of polyP, resulted in augmented
expression of cAMP receptor protein (CRP) and rpoS and
lowered H2O2 sensitivity in Salmonella Typhimurium
ATCC14028. The binding of cAMP-CRP complex to rpoS
promoter and further stimulation of its transcription were
proved through electrophoretic mobility shift assay, lacZ
fusion, and exogenous cAMP addition, respectively. The
rpoS expression increased in cpdA (cAMP phosphodiesterase
coding gene) mutant, further suggesting that cAMP-CRP
upregulated rpoS expression. These results demonstrate
that PPK affects oxidative stress response by modulating
crp and rpoS expression in S. Typhimurium.
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참고문헌 (23)
참고문헌 신청
Ahn, K. / 1990 / Polyphosphate kinase from Escherichia coli. Purification and demonstration of a phosphoenzyme intermediate / J. Biol. Chem 265 : 11734 ~ 11739
Akiyama, M. / 1993 / An exopolyphosphatase of Escherichia coli. The enzyme and its ppx gene in a polyphosphate operon / J. Biol. Chem 268 : 633 ~ 639
Ault-Riche, D. / 1998 / Novel assay reveals multiple pathways regulating stressinduced accumulations of inorganic polyphosphate in Escherichia coli / J. Bacteriol 180 : 1841
Botsford, J. L. / 1992 / Cyclic AMP in prokaryotes / Microbiol. Rev 56 : 100 ~ 122
Campoy, S. / 2002 / Intracellular cyclic AMP concentration is decreased in Salmonella Typhimurium fur mutants / Microbiology 148 : 1039 ~ 1048
Akiyama, M. / 1993 / An exopolyphosphatase of Escherichia coli. The enzyme and its ppx gene in a polyphosphate operon / J. Biol. Chem 268 : 633 ~ 639
Ault-Riche, D. / 1998 / Novel assay reveals multiple pathways regulating stressinduced accumulations of inorganic polyphosphate in Escherichia coli / J. Bacteriol 180 : 1841
Botsford, J. L. / 1992 / Cyclic AMP in prokaryotes / Microbiol. Rev 56 : 100 ~ 122
Campoy, S. / 2002 / Intracellular cyclic AMP concentration is decreased in Salmonella Typhimurium fur mutants / Microbiology 148 : 1039 ~ 1048
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