RNA polymerase II elongation complexes containing the Cockayne syndrome group B protein interact with a molecular complex containing the transcription factor IIH components xeroderma pigmentosum B and p62.
Transcription factor IIH (TFIIH) is involved both in transcription initiation by RNA polymerase II and in nucleotide excision-repair. Nucleotide excision-repair occurs at higher rates in transcriptionally active regions of the genome. Genetic studies indicate that this transcription-coupled repair is dependent on the Cockayne syndrome group A and B proteins, as well as TFIIH subunits. Previous work indicated that Cockayne syndrome group B interacts with RNA polymerase II molecules engaged in ternary complexes containing DNA and RNA. Evidence presented here indicates that this complex can interact with a factor containing the TFIIH core subunits p62 and xeroderma pigmentosum subunit B/excision repair cross-complementing 3. The targeting of TFIIH or a TFIIH-like repair factor to transcriptionally active DNA indicates a potential mechanism for transcription-coupled repair in human cells.
UCLA Molecular Biology Institute, Los Angeles, California 90095-1570, USA. dtantin@mit.edu
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D003057:Cockayne Syndrome; D004265:DNA Helicases / Q000378:metabolism*; D004260:DNA Repair; D045643:DNA Repair Enzymes; D004268:DNA-Binding Proteins / Q000378:metabolism*; D006801:Humans; D008957:Models, Genetic; D000075223:Poly-ADP-Ribose Binding Proteins; D011485:Protein Binding; D012319:RNA Polymerase II / Q000378:metabolism*; D051758:Transcription Factor TFIIH; D014157:Transcription Factors / Q000378:metabolism*; D019473:Transcription Factors, TFII; D014158:Transcription, Genetic; D014983:Xeroderma Pigmentosum
D004268:DNA-Binding Proteins; D000075223:Poly-ADP-Ribose Binding Proteins; D014157:Transcription Factors; D019473:Transcription Factors, TFII; C072022:XPBC-ERCC-3 protein; D051758:Transcription Factor TFIIH; D012319:RNA Polymerase II; D004265:DNA Helicases; C078673:ERCC6 protein, human; D045643:DNA Repair Enzymes