SUMO and ubiquitin-dependent XPC exchange drives nucleotide excision repair

Nat Commun. 2015 Jul 7;6:7499. doi: 10.1038/ncomms8499.

Abstract

XPC recognizes UV-induced DNA lesions and initiates their removal by nucleotide excision repair (NER). Damage recognition in NER is tightly controlled by ubiquitin and SUMO modifications. Recent studies have shown that the SUMO-targeted ubiquitin ligase RNF111 promotes K63-linked ubiquitylation of SUMOylated XPC after DNA damage. However, the exact regulatory function of these modifications in vivo remains elusive. Here we show that RNF111 is required for efficient repair of ultraviolet-induced DNA lesions. RNF111-mediated ubiquitylation promotes the release of XPC from damaged DNA after NER initiation, and is needed for stable incorporation of the NER endonucleases XPG and ERCC1/XPF. Our data suggest that RNF111, together with the CRL4(DDB2) ubiquitin ligase complex, is responsible for sequential XPC ubiquitylation, which regulates the recruitment and release of XPC and is crucial for efficient progression of the NER reaction, thereby providing an extra layer of quality control of NER.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line, Tumor
  • DNA Damage
  • DNA Repair / physiology*
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism*
  • Endonucleases / genetics
  • Endonucleases / metabolism
  • Gene Expression Regulation / physiology*
  • Humans
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism*
  • RNA, Small Interfering
  • SUMO-1 Protein / genetics
  • SUMO-1 Protein / metabolism*
  • Transcription Factors / genetics
  • Transcription Factors / metabolism
  • Ubiquitin-Protein Ligases / genetics
  • Ubiquitin-Protein Ligases / metabolism*

Substances

  • DNA excision repair protein ERCC-5
  • DNA-Binding Proteins
  • Nuclear Proteins
  • RNA, Small Interfering
  • SUMO-1 Protein
  • Transcription Factors
  • XPC protein, human
  • RNF111 protein, human
  • Ubiquitin-Protein Ligases
  • ERCC1 protein, human
  • Endonucleases