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1nh2

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Revision as of 07:25, 7 February 2018

Crystal structure of a yeast TFIIA/TBP/DNA complex

Structural highlights

1nh2 is a 6 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Gene:	SPT15 OR BTF1 OR YER148W (ATCC 18824), TOA1 OR YOR194C (ATCC 18824), TOA2 OR YKL058W (ATCC 18824)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[TOA1_YEAST] TFIIA is a component of the transcription machinery of RNA polymerase II and implicated in the regulation of basal transcription. Interacts with TBP (the TATA-binding protein). [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] [T2AG_YEAST] TFIIA is a component of the transcription machinery of RNA polymerase II and plays an important role in transcriptional activation. TFIIA in a complex with TBP mediates transcriptional activity.^[4]

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 PubMed

RNA polymerase II-dependent transcription requires the assembly of a multi-protein, preinitiation complex on core promoter elements. Transcription factor IID (TFIID) comprising the TATA box-binding protein (TBP) and TBP-associated factors (TAFs) is responsible for promoter recognition in this complex. Subsequent association of TFIIA and TFIIB provides enhanced complex stability. TFIIA is required for transcriptional stimulation by certain viral and cellular activators, and favors formation of the preinitiation complex in the presence of repressor NC2. The X-ray structures of human and yeast TBP/TFIIA/DNA complexes at 2.1A and 1.9A resolution, respectively, are presented here and seen to resemble each other closely. The interactions made by human TFIIA with TBP and DNA within and upstream of the TATA box, including those involving water molecules, are described and compared to the yeast structure. Of particular interest is a previously unobserved region of TFIIA that extends the binding interface with TBP in the yeast, but not in the human complex, and that further elucidates biochemical and genetic results.

Novel interactions between the components of human and yeast TFIIA/TBP/DNA complexes.,Bleichenbacher M, Tan S, Richmond TJ J Mol Biol. 2003 Sep 26;332(4):783-93. PMID:12972251^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Hampsey M. Molecular genetics of the RNA polymerase II general transcriptional machinery. Microbiol Mol Biol Rev. 1998 Jun;62(2):465-503. PMID:9618449
↑ Sanders SL, Garbett KA, Weil PA. Molecular characterization of Saccharomyces cerevisiae TFIID. Mol Cell Biol. 2002 Aug;22(16):6000-13. PMID:12138208
↑ Martinez E. Multi-protein complexes in eukaryotic gene transcription. Plant Mol Biol. 2002 Dec;50(6):925-47. PMID:12516863
↑ Ranish JA, Hahn S. The yeast general transcription factor TFIIA is composed of two polypeptide subunits. J Biol Chem. 1991 Oct 15;266(29):19320-7. PMID:1918049
↑ Bleichenbacher M, Tan S, Richmond TJ. Novel interactions between the components of human and yeast TFIIA/TBP/DNA complexes. J Mol Biol. 2003 Sep 26;332(4):783-93. PMID:12972251

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1nh2"

@@ Line 1: / Line 1: @@
 ==Crystal structure of a yeast TFIIA/TBP/DNA complex==
 <StructureSection load='1nh2' size='340' side='right' caption='[[1nh2]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=5IU:5-IODO-2-DEOXYURIDINE-5-MONOPHOSPHATE'>5IU</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SPT15 OR BTF1 OR YER148W ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), TOA1 OR YOR194C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), TOA2 OR YKL058W ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1nh2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nh2 OCA], [http://pdbe.org/1nh2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1nh2 RCSB], [http://www.ebi.ac.uk/pdbsum/1nh2 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1nh2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nh2 OCA], [http://pdbe.org/1nh2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1nh2 RCSB], [http://www.ebi.ac.uk/pdbsum/1nh2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1nh2 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/nh/1nh2_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/nh/1nh2_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 28: / Line 29: @@
 </div>
 <div class="pdbe-citations 1nh2" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[TATA-Binding Protein|TATA-Binding Protein]]
-*[[Transcription initiation factor|Transcription initiation factor]]
 == References ==
 <references/>

1nh2

From Proteopedia

Revision as of 07:25, 7 February 2018

Crystal structure of a yeast TFIIA/TBP/DNA complex

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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