Structural highlights
2m14 is a 2 chain structure with sequence from Saccharomyces cerevisiae s288c. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Related: | 1y5o, 2gs0, 2k2u, 2l2i, 2lox |
| Gene: | TFB1, YDR311W, D9740.3 (Saccharomyces cerevisiae S288c), RAD4, YER162C (Saccharomyces cerevisiae S288c) |
| Resources: | FirstGlance, OCA, RCSB, PDBsum |
Function
[TFB1_YEAST] Acts as component of the general transcription and DNA repair factor IIH (TFIIH) core, which is essential for both basal and activated transcription, and is involved in nucleotide excision repair (NER) of damaged DNA. TFIIH has CTD kinase and DNA-dependent ATPase activity, and is essential for polymerase II transcription in vitro.[1] [2] [RAD4_YEAST] Involved in nucleotide excision repair of DNA damaged with UV light, bulky adducts, or cross-linking agents.
Publication Abstract from PubMed
XPC/Rad4 (human/yeast) recruits transcription faction IIH (TFIIH) to the nucleotide excision repair (NER) complex through interactions with its p62/Tfb1 and XPB/Ssl2 subunits. TFIIH then recruits XPG/Rad2 through interactions with similar subunits and the two repair factors appear to be mutually exclusive within the NER complex. Here, we show that Rad4 binds the PH domain of the Tfb1 (Tfb1PH) with high affinity. Structural characterization of a Rad4-Tfb1PH complex demonstrates that the Rad4-binding interface is formed using a motif similar to one used by Rad2 to bind Tfb1PH. In vivo studies in yeast demonstrate that the N-terminal Tfb1-binding motif and C-terminal TFIIH-binding motif of Rad4 are both crucial for survival following exposure to UV irradiation. Together, these results support the hypothesis that XPG/Rad2 displaces XPC/Rad4 from the repair complex in part through interactions with the Tfb1/p62 subunit of TFIIH. The Rad4-Tfb1PH structure also provides detailed information regarding, not only the interplay of TFIIH recruitment to the NER, but also links the role of TFIIH in NER and transcription.
Structural and functional evidence that Rad4 competes with Rad2 for binding to the Tfb1 subunit of TFIIH in NER.,Lafrance-Vanasse J, Arseneault G, Cappadocia L, Legault P, Omichinski JG Nucleic Acids Res. 2013 Jan 7. PMID:23295669[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Svejstrup JQ, Feaver WJ, LaPointe J, Kornberg RD. RNA polymerase transcription factor IIH holoenzyme from yeast. J Biol Chem. 1994 Nov 11;269(45):28044-8. PMID:7961739
- ↑ Sung P, Guzder SN, Prakash L, Prakash S. Reconstitution of TFIIH and requirement of its DNA helicase subunits, Rad3 and Rad25, in the incision step of nucleotide excision repair. J Biol Chem. 1996 May 3;271(18):10821-6. PMID:8631896
- ↑ Lafrance-Vanasse J, Arseneault G, Cappadocia L, Legault P, Omichinski JG. Structural and functional evidence that Rad4 competes with Rad2 for binding to the Tfb1 subunit of TFIIH in NER. Nucleic Acids Res. 2013 Jan 7. PMID:23295669 doi:http://dx.doi.org/10.1093/nar/gks1321
