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1qsr
From Proteopedia
(Difference between revisions)
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| - | + | ==CRYSTAL STRUCTURE OF TETRAHYMENA GCN5 WITH BOUND ACETYL-COENZYME A== | |
| - | + | <StructureSection load='1qsr' size='340' side='right' caption='[[1qsr]], [[Resolution|resolution]] 2.00Å' scene=''> | |
| - | + | == Structural highlights == | |
| + | <table><tr><td colspan='2'>[[1qsr]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Tetrahymena_thermophila Tetrahymena thermophila]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QSR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1QSR FirstGlance]. <br> | ||
| + | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACO:ACETYL+COENZYME+*A'>ACO</scene><br> | ||
| + | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1qsr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qsr OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1qsr RCSB], [http://www.ebi.ac.uk/pdbsum/1qsr PDBsum]</span></td></tr> | ||
| + | <table> | ||
| + | == Evolutionary Conservation == | ||
| + | [[Image:Consurf_key_small.gif|200px|right]] | ||
| + | Check<jmol> | ||
| + | <jmolCheckbox> | ||
| + | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/qs/1qsr_consurf.spt"</scriptWhenChecked> | ||
| + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
| + | <text>to colour the structure by Evolutionary Conservation</text> | ||
| + | </jmolCheckbox> | ||
| + | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Gene activation is a highly regulated process that requires the coordinated action of proteins to relieve chromatin repression and to promote transcriptional activation. Nuclear histone acetyltransferase (HAT) enzymes provide a mechanistic link between chromatin destabilization and gene activation by acetylating the epsilon-amino group of specific lysine residues within the aminoterminal tails of core histones to facilitate access to DNA by transcriptional activators. Here we report the high-resolution crystal structure of the HAT domain of Tetrahymena GCN5 (tGCN5) bound with both its physiologically relevant ligands, coenzyme A (CoA) and a histone H3 peptide, and the structures of nascent tGCN5 and a tGCN5/acetyl-CoA complex. Our structural data reveal histone-binding specificity for a random-coil structure containing a G-K-X-P recognition sequence, and show that CoA is essential for reorienting the enzyme for histone binding. Catalysis appears to involve water-mediated proton extraction from the substrate lysine by a glutamic acid general base and a backbone amide that stabilizes the transition-state reaction intermediate. Comparison with related N-acetyltransferases indicates a conserved structural framework for CoA binding and catalysis, and structural variability in regions associated with substrate-specific binding. | ||
| - | + | Structure of Tetrahymena GCN5 bound to coenzyme A and a histone H3 peptide.,Rojas JR, Trievel RC, Zhou J, Mo Y, Li X, Berger SL, Allis CD, Marmorstein R Nature. 1999 Sep 2;401(6748):93-8. PMID:10485713<ref>PMID:10485713</ref> | |
| - | + | ||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
==See Also== | ==See Also== | ||
*[[Phosphoglucoisomerase|Phosphoglucoisomerase]] | *[[Phosphoglucoisomerase|Phosphoglucoisomerase]] | ||
| - | + | == References == | |
| - | + | <references/> | |
| - | == | + | __TOC__ |
| - | < | + | </StructureSection> |
[[Category: Tetrahymena thermophila]] | [[Category: Tetrahymena thermophila]] | ||
[[Category: Allis, C David.]] | [[Category: Allis, C David.]] | ||
Revision as of 15:52, 29 September 2014
CRYSTAL STRUCTURE OF TETRAHYMENA GCN5 WITH BOUND ACETYL-COENZYME A
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