View source for 3ahw


==Crystal Structure of Ustilago sphaerogena Ribonuclease U2 complexed with adenosine 2'-monophosphate==
<StructureSection load='3ahw' size='340' side='right'caption='[[3ahw]], [[Resolution|resolution]] 1.03&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3ahw]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Ustilago_sphaerogena Ustilago sphaerogena]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3AHW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3AHW 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]] 1.03&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=2AM:ADENOSINE-2-MONOPHOSPHATE'>2AM</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</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=3ahw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ahw OCA], [https://pdbe.org/3ahw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ahw RCSB], [https://www.ebi.ac.uk/pdbsum/3ahw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ahw ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/RNU2_USTSP RNU2_USTSP] 
== 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/ah/3ahw_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=3ahw ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Asparagine can be non-enzymatically deamidated and isomerized via succinimide to isoaspartate. This post-translational modification can potentially alter the physical properties or the function of the parent protein. Asn32 of ribonuclease U2A from Ustilago sphaerogena is known to rapidly deamidate and isomerize in alkaline conditions. The crystal structure of ribonuclease U2A complexed with 2'-adenylic acid and calcium ions was determined at 1.03 A resolution. In this structure, the region from Asp29 to Asp37 winds around a calcium ion, and the main-chain of Asn32-Gly33 adopts an extended conformation. Rotation of the side-chain of Asn32 could bring Asn32C(gamma) into close proximity to Gly33N, in a conformation suitable for succinimide formation. The structure suggests that in solution the region around Asn32-Gly33 is likely to be in equilibrium between multiple conformers, with the deamidation of Asn32 proceeding when the region adopts an extended conformation.

Conformational variation revealed by the crystal structure of RNase U2A complexed with Ca Ion and 2'-adenylic acid at 1.03 A resolution.,Noguchi S Protein Pept Lett. 2010;17(12):1559-61. PMID:20858208<ref>PMID:20858208</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3ahw" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Ustilago sphaerogena]]
[[Category: Noguchi S]]