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==Structure of a Sir2 enzyme bound to an acetylated p53 peptide== | |||
<StructureSection load='1ma3' size='340' side='right'caption='[[1ma3]], [[Resolution|resolution]] 2.00Å' scene=''> | |||
| | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1ma3]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Archaeoglobus_fulgidus Archaeoglobus fulgidus] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MA3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MA3 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ALY:N(6)-ACETYLLYSINE'>ALY</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ma3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ma3 OCA], [https://pdbe.org/1ma3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ma3 RCSB], [https://www.ebi.ac.uk/pdbsum/1ma3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ma3 ProSAT]</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/ma/1ma3_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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/main_output.php?pdb_ID=1ma3 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Sir2 proteins are NAD(+)-dependent protein deacetylases that play key roles in transcriptional regulation, DNA repair, and life span regulation. The structure of an archaeal Sir2 enzyme, Sir2-Af2, bound to an acetylated p53 peptide reveals that the substrate binds in a cleft in the enzyme, forming an enzyme-substrate beta sheet with two flanking strands in Sir2-Af2. The acetyl-lysine inserts into a conserved hydrophobic tunnel that contains the active site histidine. Comparison with other structures of Sir2 enzymes suggests that the apoenzyme undergoes a conformational change upon substrate binding. Based on the Sir2-Af2 substrate complex structure, mutations were made in the other A. fulgidus sirtuin, Sir2-Af1, that increased its affinity for the p53 peptide. | Sir2 proteins are NAD(+)-dependent protein deacetylases that play key roles in transcriptional regulation, DNA repair, and life span regulation. The structure of an archaeal Sir2 enzyme, Sir2-Af2, bound to an acetylated p53 peptide reveals that the substrate binds in a cleft in the enzyme, forming an enzyme-substrate beta sheet with two flanking strands in Sir2-Af2. The acetyl-lysine inserts into a conserved hydrophobic tunnel that contains the active site histidine. Comparison with other structures of Sir2 enzymes suggests that the apoenzyme undergoes a conformational change upon substrate binding. Based on the Sir2-Af2 substrate complex structure, mutations were made in the other A. fulgidus sirtuin, Sir2-Af1, that increased its affinity for the p53 peptide. | ||
Structure of a Sir2 enzyme bound to an acetylated p53 peptide.,Avalos JL, Celic I, Muhammad S, Cosgrove MS, Boeke JD, Wolberger C Mol Cell. 2002 Sep;10(3):523-35. PMID:12408821<ref>PMID:12408821</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1ma3" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Archaeoglobus fulgidus]] | [[Category: Archaeoglobus fulgidus]] | ||
[[Category: | [[Category: Homo sapiens]] | ||
[[Category: Avalos | [[Category: Large Structures]] | ||
[[Category: Boeke | [[Category: Avalos JL]] | ||
[[Category: Celic | [[Category: Boeke JD]] | ||
[[Category: Cosgrove | [[Category: Celic I]] | ||
[[Category: Muhammad | [[Category: Cosgrove MS]] | ||
[[Category: Wolberger | [[Category: Muhammad S]] | ||
[[Category: Wolberger C]] | |||
Latest revision as of 03:14, 21 November 2024
Structure of a Sir2 enzyme bound to an acetylated p53 peptideStructure of a Sir2 enzyme bound to an acetylated p53 peptide
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 PubMedSir2 proteins are NAD(+)-dependent protein deacetylases that play key roles in transcriptional regulation, DNA repair, and life span regulation. The structure of an archaeal Sir2 enzyme, Sir2-Af2, bound to an acetylated p53 peptide reveals that the substrate binds in a cleft in the enzyme, forming an enzyme-substrate beta sheet with two flanking strands in Sir2-Af2. The acetyl-lysine inserts into a conserved hydrophobic tunnel that contains the active site histidine. Comparison with other structures of Sir2 enzymes suggests that the apoenzyme undergoes a conformational change upon substrate binding. Based on the Sir2-Af2 substrate complex structure, mutations were made in the other A. fulgidus sirtuin, Sir2-Af1, that increased its affinity for the p53 peptide. Structure of a Sir2 enzyme bound to an acetylated p53 peptide.,Avalos JL, Celic I, Muhammad S, Cosgrove MS, Boeke JD, Wolberger C Mol Cell. 2002 Sep;10(3):523-35. PMID:12408821[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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