View source for 1ejf


==CRYSTAL STRUCTURE OF THE HUMAN CO-CHAPERONE P23==
<StructureSection load='1ejf' size='340' side='right'caption='[[1ejf]], [[Resolution|resolution]] 2.49&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1ejf]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EJF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1EJF FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=1ejf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ejf OCA], [http://pdbe.org/1ejf PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ejf RCSB], [http://www.ebi.ac.uk/pdbsum/1ejf PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ejf ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/TEBP_HUMAN TEBP_HUMAN]] Molecular chaperone that localizes to genomic response elements in a hormone-dependent manner and disrupts receptor-mediated transcriptional activation, by promoting disassembly of transcriptional regulatory complexes.<ref>PMID:11274138</ref> <ref>PMID:12077419</ref> <ref>PMID:10922363</ref>  
== 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/ej/1ejf_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/main_output.php?pdb_ID=1ejf ConSurf].
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== Publication Abstract from PubMed ==
p23 is a co-chaperone for the heat shock protein, hsp90. This protein binds hsp90 and participates in the folding of a number of cell regulatory proteins, but its activities are still unclear. We have solved a crystal structure of human p23 lacking 35 residues at the COOH terminus. The structure reveals a disulfide-linked dimer with each subunit containing eight beta-strands in a compact antiparallel beta-sandwich fold. In solution, however, p23 is primarily monomeric and the dimer appears to be a minor component. Conserved residues are clustered on one face of the monomer and define a putative surface region and binding pocket for interaction(s) with hsp90 or protein substrates. p23 contains a COOH-terminal tail that is apparently less structured and is unresolved in the crystal structure. This tail is not needed for the binding of p23 to hsp90 or to complexes with the progesterone receptor. However, the tail is necessary for optimum active chaperoning of the progesterone receptor, as well as the passive chaperoning activity of p23 in assays measuring inhibition of heat-induced protein aggregation.

Crystal structure and activity of human p23, a heat shock protein 90 co-chaperone.,Weaver AJ, Sullivan WP, Felts SJ, Owen BA, Toft DO J Biol Chem. 2000 Jul 28;275(30):23045-52. PMID:10811660<ref>PMID:10811660</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1ejf" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human]]
[[Category: Large Structures]]
[[Category: Felts, S J]]
[[Category: Owen, B A.L]]
[[Category: Sullivan, W P]]
[[Category: Toft, D O]]
[[Category: Weaver, A J]]
[[Category: Beta-sandwich]]
[[Category: Chaperone]]
[[Category: Co-chaperone]]