E2F-dependent transcription determines replication capacity and S phase length

Betheney R. Pennycook, Eva Vesela, Silvia Peripolli, Tanya Singh, Alexis R. Barr, Cosetta Bertoli () and Robertus A. M. de Bruin ()
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Betheney R. Pennycook: University College London
Eva Vesela: University College London
Silvia Peripolli: University College London
Tanya Singh: University College London
Alexis R. Barr: MRC London Institute of Medical Science Hammersmith Hospital Campus
Cosetta Bertoli: University College London
Robertus A. M. de Bruin: University College London

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract DNA replication timing is tightly regulated during S-phase. S-phase length is determined by DNA synthesis rate, which depends on the number of active replication forks and their velocity. Here, we show that E2F-dependent transcription, through E2F6, determines the replication capacity of a cell, defined as the maximal amount of DNA a cell can synthesise per unit time during S-phase. Increasing or decreasing E2F-dependent transcription during S-phase increases or decreases replication capacity, and thereby replication rates, thus shortening or lengthening S-phase, respectively. The changes in replication rate occur mainly through changes in fork speed without affecting the number of active forks. An increase in fork speed does not induce replication stress directly, but increases DNA damage over time causing cell cycle arrest. Thus, E2F-dependent transcription determines the DNA replication capacity of a cell, which affects the replication rate, controlling the time it takes to duplicate the genome and complete S-phase.

Date: 2020
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DOI: 10.1038/s41467-020-17146-z

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