View source for 1v81

==Solution structures of ubiquitin at 30 bar and 3 kbar==
<StructureSection load='1v81' size='340' side='right' caption='[[1v81]], [[NMR_Ensembles_of_Models | 10 NMR models]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1v81]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1V81 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1V81 FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1v80|1v80]]</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=1v81 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1v81 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1v81 RCSB], [http://www.ebi.ac.uk/pdbsum/1v81 PDBsum], [http://www.topsan.org/Proteins/RSGI/1v81 TOPSAN]</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/v8/1v81_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 ==
Conformational fluctuation plays a key role in protein function, but we know little about the associated structural changes. Here we present a general method for elucidating, at the atomic level, a large-scale shape change of a protein molecule in solution undergoing conformational fluctuation. The method utilizes the intimate relationship between conformation and partial molar volume and determines three-dimensional structures of a protein at different pressures using variable pressure NMR technique, whereby NOE distance and torsion angle constraints are used to create average coordinates. Ubiquitin (pH 4.6 at 20 degrees C) was chosen as the first target, for which structures were determined at 30 bar and at 3 kbar, giving "NMR snapshots" of a fluctuating protein structure at atomic resolution. The result reveals that the helix swings in and out by &gt;3 angstroms with a simultaneous reorientation of the C-terminal segment, providing an "open" conformer suitable for enzyme recognition. Spin relaxation analysis indicates that this fluctuation occurs in the ten microsecond time range with activation volumes -4.2(+/-3.2) and 18.5(+/-3.0) ml/mol for the "closed-to-open" and the "open-to-closed" transitions, respectively.

NMR snapshots of a fluctuating protein structure: ubiquitin at 30 bar-3 kbar.,Kitahara R, Yokoyama S, Akasaka K J Mol Biol. 2005 Mar 25;347(2):277-85. PMID:15740740<ref>PMID:15740740</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>

==See Also==
*[[Ribosomal protein L40|Ribosomal protein L40]]
*[[Ubiquitin|Ubiquitin]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bos taurus]]
[[Category: Akasaka, K]]
[[Category: Kitahara, R]]
[[Category: Structural genomic]]
[[Category: Yokoyama, S]]
[[Category: National project on protein structural and functional analyse]]
[[Category: Nppsfa]]
[[Category: Pressure]]
[[Category: Rsgi]]
[[Category: Signaling protein]]