1qso: Difference between revisions
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[[Image: | ==Histone Acetyltransferase HPA2 from Saccharomyces Cerevisiae== | ||
<StructureSection load='1qso' size='340' side='right' caption='[[1qso]], [[Resolution|resolution]] 2.90Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1qso]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QSO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1QSO FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Histone_acetyltransferase Histone acetyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.48 2.3.1.48] </span></td></tr> | |||
<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=1qso FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qso OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1qso RCSB], [http://www.ebi.ac.uk/pdbsum/1qso 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/1qso_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 == | |||
We report the crystal structure of the yeast protein Hpa2 in complex with acetyl coenzyme A (AcCoA) at 2.4 A resolution and without cofactor at 2.9 A resolution. Hpa2 is a member of the Gcn5-related N-acetyltransferase (GNAT) superfamily, a family of enzymes with diverse substrates including histones, other proteins, arylalkylamines and aminoglycosides. In vitro, Hpa2 is able to acetylate specific lysine residues of histones H3 and H4 with a preference for Lys14 of histone H3. Hpa2 forms a stable dimer in solution and forms a tetramer upon binding AcCoA. The crystal structure reveals that the Hpa2 tetramer is stabilized by base-pair interactions between the adenine moieties of the bound AcCoA molecules. These base-pairs represent a novel method of stabilizing an oligomeric protein structure. Comparison of the structure of Hpa2 with those of other GNAT superfamily members illustrates a remarkably conserved fold of the catalytic domain of the GNAT family even though members of this family share low levels of sequence homology. This comparison has allowed us to better define the borders of the four sequence motifs that characterize the GNAT family, including a motif that is not discernable in histone acetyltransferases by sequence comparison alone. We discuss implications of the Hpa2 structure for the catalytic mechanism of the GNAT enzymes and the opportunity for multiple histone tail modification created by the tetrameric Hpa2 structure. | |||
Crystal structure of the histone acetyltransferase Hpa2: A tetrameric member of the Gcn5-related N-acetyltransferase superfamily.,Angus-Hill ML, Dutnall RN, Tafrov ST, Sternglanz R, Ramakrishnan V J Mol Biol. 1999 Dec 17;294(5):1311-25. PMID:10600387<ref>PMID:10600387</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Histone acetyltransferase|Histone acetyltransferase]] | *[[Histone acetyltransferase|Histone acetyltransferase]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Histone acetyltransferase]] | [[Category: Histone acetyltransferase]] | ||
[[Category: Saccharomyces cerevisiae]] | [[Category: Saccharomyces cerevisiae]] | ||
Revision as of 02:17, 29 September 2014
Histone Acetyltransferase HPA2 from Saccharomyces CerevisiaeHistone Acetyltransferase HPA2 from Saccharomyces Cerevisiae
Structural highlights
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 PubMedWe report the crystal structure of the yeast protein Hpa2 in complex with acetyl coenzyme A (AcCoA) at 2.4 A resolution and without cofactor at 2.9 A resolution. Hpa2 is a member of the Gcn5-related N-acetyltransferase (GNAT) superfamily, a family of enzymes with diverse substrates including histones, other proteins, arylalkylamines and aminoglycosides. In vitro, Hpa2 is able to acetylate specific lysine residues of histones H3 and H4 with a preference for Lys14 of histone H3. Hpa2 forms a stable dimer in solution and forms a tetramer upon binding AcCoA. The crystal structure reveals that the Hpa2 tetramer is stabilized by base-pair interactions between the adenine moieties of the bound AcCoA molecules. These base-pairs represent a novel method of stabilizing an oligomeric protein structure. Comparison of the structure of Hpa2 with those of other GNAT superfamily members illustrates a remarkably conserved fold of the catalytic domain of the GNAT family even though members of this family share low levels of sequence homology. This comparison has allowed us to better define the borders of the four sequence motifs that characterize the GNAT family, including a motif that is not discernable in histone acetyltransferases by sequence comparison alone. We discuss implications of the Hpa2 structure for the catalytic mechanism of the GNAT enzymes and the opportunity for multiple histone tail modification created by the tetrameric Hpa2 structure. Crystal structure of the histone acetyltransferase Hpa2: A tetrameric member of the Gcn5-related N-acetyltransferase superfamily.,Angus-Hill ML, Dutnall RN, Tafrov ST, Sternglanz R, Ramakrishnan V J Mol Biol. 1999 Dec 17;294(5):1311-25. PMID:10600387[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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