4b0a

The high-resolution structure of yTBP-yTAF1 identifies conserved and competing interaction surfaces in transcriptional activation

spinqualitylabelsall models 4b0a, resolution 1.97Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4b0a is a 1 chain structure with sequence from Baker's yeast. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, CL, GOL Related: 1ngm, 1nh2, 1rm1, 1tba, 1tbp, 1ytb, 1ytf Activity: Histone acetyltransferase, with EC number 2.3.1.48 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [TAF1_YEAST] Functions as a component 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 pre-initiation 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. Publication Abstract from PubMed The general transcription factor TFIID provides a regulatory platform for transcription initiation. Here we present the crystal structure (1.97 A) and NMR analysis of yeast TAF1 N-terminal domains TAND1 and TAND2 bound to yeast TBP, together with mutational data. We find that yeast TAF1-TAND1, which in itself acts as a transcriptional activator, binds TBP's concave DNA-binding surface by presenting similar anchor residues to TBP as does Mot1 but from a distinct structural scaffold. Furthermore, we show how TAF1-TAND2 uses an aromatic and acidic anchoring pattern to bind a conserved TBP surface groove traversing the basic helix region, and we find highly similar TBP-binding motifs also presented by the structurally distinct TFIIA, Mot1 and Brf1 proteins. Our identification of these anchoring patterns, which can be easily disrupted or enhanced, provides insight into the competitive multiprotein TBP interplay critical to transcriptional regulation. High-resolution structure of TBP with TAF1 reveals anchoring patterns in transcriptional regulation.,Anandapadamanaban M, Andresen C, Helander S, Ohyama Y, Siponen MI, Lundstrom P, Kokubo T, Ikura M, Moche M, Sunnerhagen M Nat Struct Mol Biol. 2013 Jul 14. doi: 10.1038/nsmb.2611. PMID:23851461 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA