De novo phosphorylation of H2AX by WSTF regulates transcription-coupled homologous recombination repair

作者: Jae-Hoon Ji , Sunwoo Min , Sunyoung Chae , Geun-Hyoung Ha , Yonghyeon Kim

DOI: 10.1093/NAR/GKZ309

关键词: DNATranscription (biology)BiologyRNA polymerase IIHomologous recombinationChromatinTranscription factorCell biologyRAD51DNA damage

摘要: Histone H2AX undergoes a phosphorylation switch from pTyr142 (H2AX-pY142) to pSer139 (γH2AX) in the DNA damage response (DDR); however, functional role of H2AX-pY142 remains elusive. Here, we report new layer regulation involving transcription-coupled DDR. We found that constitutive generated by Williams-Beuren syndrome transcription factor (WSTF) interacts with RNA polymerase II (RNAPII) and is associated RNAPII-mediated active proliferating cells. Also, removal pre-existing ATM-dependent EYA1/3 phosphatases disrupts this association requires for transcriptional silencing at transcribed sites. The following recovery via translocation WSTF lesions facilitates homologous recombination (TC-HR) G1 phase, whereby RAD51 loading, but not RPA32, utilizes RNAPII-dependent transcripts as donor templates. propose WSTF-H2AX-RNAPII axis regulates TC-HR repair maintain genome integrity.

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