2ioq

<StructureSection load='2ioq' size='340' side='right' caption='[[2ioq]], [[Resolution|resolution]] 3.50&Aring;' scene=''>

<table><tr><td colspan='2'>[[2ioq]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. The December 2008 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Hsp90'' by David Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2008_12 10.2210/rcsb_pdb/mom_2008_12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IOQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2IOQ FirstGlance]. <br>

</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1y4u|1y4u]], [[1y4s|1y4s]], [[2iop|2iop]], [[2ior|2ior]]</td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">htpG ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])</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=2ioq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ioq OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2ioq RCSB], [http://www.ebi.ac.uk/pdbsum/2ioq PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/HTPG_ECOLI HTPG_ECOLI]] Molecular chaperone. Has ATPase activity.[HAMAP-Rule:MF_00505]

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/io/2ioq_consurf.spt"</scriptWhenChecked>

</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].

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== Publication Abstract from PubMed ==

In eukaryotes, the ubiquitous and abundant members of the 90 kilodalton heat-shock protein (hsp90) chaperone family facilitate the folding and conformational changes of a broad array of proteins important in cell signaling, proliferation, and survival. Here we describe the effects of nucleotides on the structure of full-length HtpG, the Escherichia coli hsp90 ortholog. By electron microscopy, the nucleotide-free, AMPPNP bound, and ADP bound states of HtpG adopt completely distinct conformations. Structural characterization of nucleotide-free and ADP bound HtpG was extended to higher resolution by X-ray crystallography. In the absence of nucleotide, HtpG exhibits an "open" conformation in which the three domains of each monomer present hydrophobic elements into the large cleft formed by the dimer. By contrast, ADP binding drives dramatic conformational changes that allow these hydrophobic elements to converge and shield each other from solvent, suggesting a mechanism by which nucleotides could control client protein binding and release.

Structural Analysis of E. coli hsp90 reveals dramatic nucleotide-dependent conformational rearrangements.,Shiau AK, Harris SF, Southworth DR, Agard DA Cell. 2006 Oct 20;127(2):329-40. PMID:17055434<ref>PMID:17055434</ref>

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

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*[[Heat Shock Proteins|Heat Shock Proteins]]

[[Category: Agard, D A]]

[[Category: Harris, S F]]

[[Category: Shiau, A K]]

[[Category: Heat shock protein]]