2r2i
From Proteopedia
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| - | [[Image:2r2i.jpg|left|200px]]<br /><applet load="2r2i" size="350" color="white" frame="true" align="right" spinBox="true" | ||
| - | caption="2r2i, resolution 2.000Å" /> | ||
| - | '''Myristoylated Guanylate Cyclase Activating Protein-1 with Calcium Bound'''<br /> | ||
| - | == | + | ==Myristoylated Guanylate Cyclase Activating Protein-1 with Calcium Bound== |
| + | <StructureSection load='2r2i' size='340' side='right'caption='[[2r2i]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[2r2i]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Chick Chick]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2R2I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2R2I FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MYR:MYRISTIC+ACID'>MYR</scene></td></tr> | ||
| + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GUCA1A, GCAP1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9031 CHICK])</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=2r2i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2r2i OCA], [https://pdbe.org/2r2i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2r2i RCSB], [https://www.ebi.ac.uk/pdbsum/2r2i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2r2i ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[https://www.uniprot.org/uniprot/GUC1A_CHICK GUC1A_CHICK]] Stimulates guanylyl cyclase 1 (GC1) when free calcium ions concentration is low and inhibits GC1 when free calcium ions concentration is elevated. This Ca(2+)-sensitive regulation of GC is a key event in recovery of the dark state of rod photoreceptors following light exposure (By similarity). | ||
| + | == 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/r2/2r2i_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=2r2i ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
Guanylate cyclase-activating proteins (GCAPs) are Ca(2+)-binding proteins myristoylated at the N terminus that regulate guanylate cyclases in photoreceptor cells and belong to the family of neuronal calcium sensors (NCS). Many NCS proteins display a recoverin-like "calcium-myristoyl switch" whereby the myristoyl group, buried inside the protein in the Ca(2+)-free state, becomes fully exposed upon Ca(2+) binding. Here we present a 2.0 A resolution crystal structure of myristoylated GCAP1 with Ca(2+) bound. The acyl group is buried inside Ca(2+)-bound GCAP1. This is in sharp contrast to Ca(2+)-bound recoverin, where the myristoyl group is solvent exposed. Furthermore, we provide direct evidence that the acyl group in GCAP1 remains buried in the Ca(2+)-free state and does not undergo switching. A pronounced kink in the C-terminal helix and the presence of the myristoyl group allow clustering of sequence elements crucial for GCAP1 activity. | Guanylate cyclase-activating proteins (GCAPs) are Ca(2+)-binding proteins myristoylated at the N terminus that regulate guanylate cyclases in photoreceptor cells and belong to the family of neuronal calcium sensors (NCS). Many NCS proteins display a recoverin-like "calcium-myristoyl switch" whereby the myristoyl group, buried inside the protein in the Ca(2+)-free state, becomes fully exposed upon Ca(2+) binding. Here we present a 2.0 A resolution crystal structure of myristoylated GCAP1 with Ca(2+) bound. The acyl group is buried inside Ca(2+)-bound GCAP1. This is in sharp contrast to Ca(2+)-bound recoverin, where the myristoyl group is solvent exposed. Furthermore, we provide direct evidence that the acyl group in GCAP1 remains buried in the Ca(2+)-free state and does not undergo switching. A pronounced kink in the C-terminal helix and the presence of the myristoyl group allow clustering of sequence elements crucial for GCAP1 activity. | ||
| - | + | Stabilizing function for myristoyl group revealed by the crystal structure of a neuronal calcium sensor, guanylate cyclase-activating protein 1.,Stephen R, Bereta G, Golczak M, Palczewski K, Sousa MC Structure. 2007 Nov;15(11):1392-402. PMID:17997965<ref>PMID:17997965</ref> | |
| - | + | ||
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | [[Category: | + | <div class="pdbe-citations 2r2i" style="background-color:#fffaf0;"></div> |
| - | [[Category: | + | == References == |
| - | [[Category: Stephen, R | + | <references/> |
| - | + | __TOC__ | |
| - | + | </StructureSection> | |
| - | + | [[Category: Chick]] | |
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: | + | [[Category: Stephen, R]] |
| - | [[Category: | + | [[Category: Calcium]] |
| - | [[Category: | + | [[Category: Ef hand]] |
| - | [[Category: | + | [[Category: Gcap]] |
| - | [[Category: | + | [[Category: Gcap-1]] |
| - | [[Category: | + | [[Category: Gcap1]] |
| - | [[Category: | + | [[Category: Guanylate cyclase activating protein]] |
| - | [[Category: | + | [[Category: Lipoprotein]] |
| - | [[Category: | + | [[Category: Lyase activator]] |
| - | [[Category: | + | [[Category: Myristate]] |
| - | + | [[Category: Sensory transduction]] | |
| - | + | [[Category: Vision]] | |
Current revision
Myristoylated Guanylate Cyclase Activating Protein-1 with Calcium Bound
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