1tbp
From Proteopedia
CRYSTAL STRUCTURE OF YEAST TATA-BINDING PROTEIN AND MODEL FOR INTERACTION WITH DNA
Structural highlights
Function[TBP_YEAST] General transcription factor that functions at the core of the DNA-binding general transcription factor complex TFIID. Binding of TFIID to a promoter (with or without TATA element) is the initial step in preinitiation complex (PIC) formation. TFIID plays a key role in the regulation of gene expression by RNA polymerase II through different activities such as transcription activator interaction, core promoter recognition and selectivity, TFIIA and TFIIB interaction, chromatin modification (histone acetylation by TAF1), facilitation of DNA opening and initiation of transcription.[1] [2] [3] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe C-terminal 179-aa region of yeast (Saccharomyces cerevisiae) TATA-binding protein (TBP), phylogenetically conserved and sufficient for many functions, formed crystals diffracting to 1.7-A resolution. The structure of the protein, determined by molecular replacement with coordinates from Arabidopsis TBP and refined to 2.6 A, differed from that in Arabidopsis slightly by an angle of about 12 degrees between two structurally nearly identical subdomains, indicative of a degree of conformational flexibility. A model for TBP-DNA interaction is proposed with the following important features: the long dimension of the protein follows the trajectory of the minor groove; two rows of basic residues conserved between the subdomains lie along the edges of the protein in proximity to the DNA phosphates; a band of hydrophobic residues runs down the middle of the groove; and amino acid residues whose mutation alters specificity for the second base of the TATA sequence are juxtaposed to that base. Crystal structure of yeast TATA-binding protein and model for interaction with DNA.,Chasman DI, Flaherty KM, Sharp PA, Kornberg RD Proc Natl Acad Sci U S A. 1993 Sep 1;90(17):8174-8. PMID:8367480[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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