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PARP2 mediates branched poly ADP-ribosylation in response to DNA damage

Author

Listed:
  • Qian Chen

    (City of Hope Medical Center)

  • Muzaffer Ahmad Kassab

    (City of Hope Medical Center)

  • Françoise Dantzer

    (CNRS/Strasbourg University)

  • Xiaochun Yu

    (City of Hope Medical Center)

Abstract

Poly(ADP-ribosyl)ation (PARylation) is a posttranslational modification involved in multiple biological processes, including DNA damage repair. This modification is catalyzed by poly(ADP-ribose) polymerase (PARP) family of enzymes. PARylation is composed of both linear and branched polymers of poly(ADP-ribose) (PAR). However, the biochemical mechanism of polymerization and biological functions of branched PAR chains are elusive. Here we show that PARP2 is preferentially activated by PAR and subsequently catalyzes branched PAR chain synthesis. Notably, the direct binding to PAR by the N-terminus of PARP2 promotes the enzymatic activity of PARP2 toward the branched PAR chain synthesis. Moreover, the PBZ domain of APLF recognizes the branched PAR chain and regulates chromatin remodeling to DNA damage response. This unique feature of PAR-dependent PARP2 activation and subsequent PARylation mediates the participation of PARP2 in DNA damage repair. Thus, our results reveal an important molecular mechanism of branched PAR synthesis and a key biological function of branched PARylation.

Suggested Citation

  • Qian Chen & Muzaffer Ahmad Kassab & Françoise Dantzer & Xiaochun Yu, 2018. "PARP2 mediates branched poly ADP-ribosylation in response to DNA damage," Nature Communications, Nature, vol. 9(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05588-5
    DOI: 10.1038/s41467-018-05588-5
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    Cited by:

    1. Charlotte Blessing & Katja Apelt & Diana Heuvel & Claudia Gonzalez-Leal & Magdalena B. Rother & Melanie Woude & Román González-Prieto & Adi Yifrach & Avital Parnas & Rashmi G. Shah & Tia Tyrsett Kuo &, 2022. "XPC–PARP complexes engage the chromatin remodeler ALC1 to catalyze global genome DNA damage repair," Nature Communications, Nature, vol. 13(1), pages 1-18, December.
    2. Ivo A. Hendriks & Sara C. Buch-Larsen & Evgeniia Prokhorova & Jonas D. Elsborg & Alexandra K.L.F.S. Rebak & Kang Zhu & Dragana Ahel & Claudia Lukas & Ivan Ahel & Michael L. Nielsen, 2021. "The regulatory landscape of the human HPF1- and ARH3-dependent ADP-ribosylome," Nature Communications, Nature, vol. 12(1), pages 1-16, December.

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