OxyS small RNA induces cell cycle arrest to allow DNA damage repair

Abstract: To maintain genome integrity, organisms employ DNA damage response, the underlying principles of which are conserved from bacteria to humans. The bacterial small RNA OxyS of Escherichia coli is induced upon oxidative stress and has been implicated in protecting cells from DNA damage; however, the mechanism by which OxyS confers genome stability remained unknown. Here, we revealed an OxyS-induced molecular checkpoint relay, leading to temporary cell cycle arrest to allow damage repair. By repressing the expression of the essential transcription termination factor nusG, OxyS enables read-through transcription into a cryptic prophage encoding kilR. The KilR protein interferes with the function of the major cell division protein FtsZ, thus imposing growth arrest. This transient growth inhibition facilitates DNA damage repair, enabling cellular recovery, thereby increasing viability following stress. The OxyS-mediated growth arrest represents a novel tier of defense, introducing a new regulatory concept into bacterial stress response

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch
Notes
The EMBO journal. - 37, 3 (2018) , 413-426, ISSN: 1460-2075

Event
Veröffentlichung
(where)
Freiburg
(who)
Universität
(when)
2022
Creator
Barshishat, Shir
Elgrably‐Weiss, Maya
Edelstein, Jonathan
Georg, Jens
Govindarajan, Sutharsan
Haviv, Meytal
Wright, Patrick R.
Hess, Wolfgang
Altuvia, Shoshy

DOI
10.15252/embj.201797651
URN
urn:nbn:de:bsz:25-freidok-2304040
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
25.03.2025, 1:42 PM CET

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Associated

Time of origin

  • 2022

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