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"Interactions involving the human RNA polymerase II transcription/nucleotide excision repair complex TFIIH, the nucleotide excision repair protein XPG, and Cockayne syndrome group B (CSB) protein."

Iyer N, Reagan MS, Wu KJ, Canagarajah B, Friedberg EC



Published Jan. 20, 1996 in Biochemistry volume 35 .

Pubmed ID: 8652557

Abstract:
The human basal transcription factor TFIIH plays a central role in two distinct processes. TFIIH is an obligatory component of the RNA polymerase II (RNAP II) transcription initiation complex. Additionally, it is believed to be the core structure around which some if not all the components of the nucleotide excision repair (NER) machinery assemble to constitute a nucleotide excision repairosome. At least two of the subunits of TFIIH (XPB and XPD proteins) are implicated in the disease xeroderma pigmentosum (XP). We have exploited the availability of the cloned XPB, XPD, p62, p44, and p34 genes (all of which encode polypeptide subunits of TFIIH) to examine interactions between in vitro-translated polypeptides by co-immunoprecipitation. Additionally we have examined interactions between TFIIH components, the human NER protein XPG, and the CSB protein which is implicated in Cockayne syndrome (CS). Our analyses demonstrate that the XPB, XPD, p44, and p62 proteins interact with each other. XPG protein interacts with multiple subunits of TFIIH and with CSB protein.


This publication refers to following REPAIRtoire entries:

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Last modification of this entry: Oct. 6, 2010

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