Abstract
Abstract PAF1 complex is a transcriptional complex composed of PAF1, CTR9, CDC73, LEO1, RTF1 and SKI8 in human. It plays a key role in the regulation of every step of transcription, from initiation to termination. PAF1 complex associates with RNA polymerase ΙΙ during transcription, and regulates modification patterns of surrounding histones or chromatin structure via recruitment of histone modifying enzymes or chromatin remodeling factors to the actively transcribed site. In yeast, PAF1 complex has been also proposed to involve in other DNA associated processes, like DNA recombination, replication, and repair. However, detailed molecular mechanism of this regulation has not been fully understood. We recently observed significant DNA breakage in the PAF1 complex depleted cells. DNA repair of artificially introduced DNA break by I-SceI endonuclease was less efficiently repaired in these cells, indicating the connection between the DNA damage repair and active transcription. The molecular mechanism of this regulation will be discussed. Citation Format: Garin Park, Nari Kim, Joo-Yeon Yoo. Involvement of PAF1 complex in the DNA damage response [abstract]. In: Proceedings of the AACR Special Conference on DNA Repair: Tumor Development and Therapeutic Response; 2016 Nov 2-5; Montreal, QC, Canada. Philadelphia (PA): AACR; Mol Cancer Res 2017;15(4_Suppl):Abstract nr B13.
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