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2qkv

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(New page: 200px<br /><applet load="2qkv" size="350" color="white" frame="true" align="right" spinBox="true" caption="2qkv, resolution 1.550&Aring;" /> '''Crystal Structure o...)
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[[Image:2qkv.jpg|left|200px]]<br /><applet load="2qkv" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="2qkv, resolution 1.550&Aring;" />
 
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'''Crystal Structure of the C645S Mutant of the 5th PDZ Domain of InaD'''<br />
 
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==Overview==
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==Crystal Structure of the C645S Mutant of the 5th PDZ Domain of InaD==
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The INAD scaffold organizes a multiprotein complex that is essential for, proper visual signaling in Drosophila photoreceptor cells. Here we show, that one of the INAD PDZ domains (PDZ5) exists in a redox-dependent, equilibrium between two conformations--a reduced form that is similar to, the structure of other PDZ domains, and an oxidized form in which the, ligand-binding site is distorted through formation of a strong, intramolecular disulfide bond. We demonstrate transient light-dependent, formation of this disulfide bond in vivo and find that transgenic flies, expressing a mutant INAD in which PDZ5 is locked in the reduced state, display severe defects in termination of visual responses and visually, mediated reflex behavior. These studies demonstrate a conformational, switch mechanism for PDZ domain function and suggest that INAD behaves, more like a dynamic machine rather than a passive scaffold, regulating, signal transduction at the millisecond timescale through cycles of, conformational change.
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<StructureSection load='2qkv' size='340' side='right'caption='[[2qkv]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[2qkv]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QKV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2QKV FirstGlance]. <br>
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2QKV is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QKV OCA].
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.55&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2qkv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qkv OCA], [https://pdbe.org/2qkv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2qkv RCSB], [https://www.ebi.ac.uk/pdbsum/2qkv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2qkv ProSAT]</span></td></tr>
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==Reference==
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</table>
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Dynamic scaffolding in a g protein-coupled signaling system., Mishra P, Socolich M, Wall MA, Graves J, Wang Z, Ranganathan R, Cell. 2007 Oct 5;131(1):80-92. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=17923089 17923089]
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== Function ==
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[https://www.uniprot.org/uniprot/INAD_DROME INAD_DROME] Involved in the negative feedback regulation of the light-activated signaling cascade in photoreceptors through a calcium-mediated process. Interacts with tetrapeptide ligand located in C-terminal sequence of 3 key components of the visual cascade, tethering them and forming a macromolecular signaling phototransduction complex.<ref>PMID:7826638</ref> <ref>PMID:11342563</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/qk/2qkv_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=2qkv ConSurf].
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<div style="clear:both"></div>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Drosophila melanogaster]]
[[Category: Drosophila melanogaster]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Ranganathan, R.]]
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[[Category: Ranganathan R]]
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[[Category: Socolich, M.]]
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[[Category: Socolich M]]
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[[Category: membrane]]
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[[Category: pdz domain]]
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[[Category: peptide binding protein]]
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[[Category: scaffolding protein]]
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[[Category: sensory transduction]]
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[[Category: vision]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jan 23 12:23:33 2008''
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Current revision

Crystal Structure of the C645S Mutant of the 5th PDZ Domain of InaD

PDB ID 2qkv

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