DOI: 10.1073/pnas.202495099. A signal transduction protein cues proteolytic events critical to <i>Caulobacter</i> cell cycle progression

A signal transduction protein cues proteolytic events critical to Caulobacter cell cycle progression

10.1073/pnas.202495099

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

Temporally controlled proteolysis of the essential response regulator, CtrA, is critical for cell cycle progression in Caulobacter crescentus . CtrA binds to and silences the origin of replication in swarmer cells. The initiation of replication depends on the proteolysis of CtrA. We present evidence that DivK, an essential single-domain response regulator, contributes to the control of the G 1 –S transition by signaling the temporally controlled proteolysis of CtrA. In a divK-cs mutant at the restrictive temperature, the initiation of DNA replication is blocked because of the retention of CtrA. A shift of cells from restrictive to permissive temperature results in rapid degradation of CtrA, initiation of DNA replication, and the resumption of cell cycle progression, including the ordered expression of genes involved in chromosome replication and polar organelle biogenesis. CtrA binds to and regulates the promoters of two genes critical to its temporally controlled proteolysis, divK and clpP , providing a transcriptional feedback loop for the control of cell cycle progression.

Bibliography

Hung, D. Y., & Shapiro, L. (2002). A signal transduction protein cues proteolytic events critical to Caulobacter cell cycle progression. Proceedings of the National Academy of Sciences, 99(20), 13160â13165.

Authors 2

Dean Y. Hung (first)
Lucy Shapiro (additional)

References 20 Referenced 81

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Dates

Type	When
Created	22 years, 11 months ago (Oct. 1, 2002, 12:58 p.m.)
Deposited	3 years, 4 months ago (April 13, 2022, 7:57 a.m.)
Indexed	1 year, 1 month ago (Aug. 4, 2024, 9:55 a.m.)
Issued	22 years, 11 months ago (Sept. 17, 2002)
Published	22 years, 11 months ago (Sept. 17, 2002)
Published Online	22 years, 11 months ago (Sept. 17, 2002)
Published Print	22 years, 11 months ago (Oct. 1, 2002)

Funders 0

None

BibTeX

@article{Hung_2002, title={A signal transduction protein cues proteolytic events critical to Caulobacter cell cycle progression}, volume={99}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.202495099}, DOI={10.1073/pnas.202495099}, number={20}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Hung, Dean Y. and Shapiro, Lucy}, year={2002}, month=sep, pages={13160–13165} }

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