The Transcription Factor TFII-I Promotes DNA Translesion Synthesis and Genomic Stability

Farjana J. Fattah, Kodai Hara, Kazi R. Fattah, Chenyi Yang, Nan Wu, Ross Warrington, David J. Chen, Pengbo Zhou, David A. Boothman, Hongtao Yu

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Translesion synthesis (TLS) enables DNA replication through damaged bases, increases cellular DNA damage tolerance, and maintains genomic stability. The sliding clamp PCNA and the adaptor polymerase Rev1 coordinate polymerase switching during TLS. The polymerases Pol η, ι, and κ insert nucleotides opposite damaged bases. Pol ζ, consisting of the catalytic subunit Rev3 and the regulatory subunit Rev7, then extends DNA synthesis past the lesion. Here, we show that Rev7 binds to the transcription factor TFII-I in human cells. TFII-I is required for TLS and DNA damage tolerance. The TLS function of TFII-I appears to be independent of its role in transcription, but requires homodimerization and binding to PCNA. We propose that TFII-I bridges PCNA and Pol ζ to promote TLS. Our findings extend the general principle of component sharing among divergent nuclear processes and implicate TLS deficiency as a possible contributing factor in Williams-Beuren syndrome.

Original languageEnglish (US)
Article numbere1004419
JournalPLoS genetics
Issue number6
StatePublished - Jun 2014

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics
  • Genetics(clinical)
  • Cancer Research


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