3c4w: Difference between revisions

==Crystal Structure of G protein coupled receptor kinase 1 bound to ATP and magnesium chloride at 2.7A==

<StructureSection load='3c4w' size='340' side='right'caption='[[3c4w]], [[Resolution|resolution]] 2.70&Aring;' scene=''>

== Structural highlights ==

<table><tr><td colspan='2'>[[3c4w]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C4W OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3C4W FirstGlance]. <br>

</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7&#8491;</td></tr>

<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></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=3c4w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c4w OCA], [https://pdbe.org/3c4w PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3c4w RCSB], [https://www.ebi.ac.uk/pdbsum/3c4w PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3c4w ProSAT]</span></td></tr>

== Function ==

[https://www.uniprot.org/uniprot/GRK1_BOVIN GRK1_BOVIN] Retina-specific kinase involved in the signal turnoff via phosphorylation of rhodopsin (RHO), the G protein- coupled receptor that initiates the phototransduction cascade (PubMed:12686556, PubMed:16675451, PubMed:21299498). This rapid desensitization is essential for scotopic vision and permits rapid adaptation to changes in illumination (By similarity). May play a role in the maintenance of the outer nuclear layer in the retina (By similarity).[UniProtKB:Q9WVL4]<ref>PMID:12686556</ref> <ref>PMID:16675451</ref> <ref>PMID:21299498</ref>

[[Image:Consurf_key_small.gif|200px|right]]

    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c4/3c4w_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/main_output.php?pdb_ID=3c4w ConSurf].

== Publication Abstract from PubMed ==

G protein-coupled receptor (GPCR) kinases (GRKs) phosphorylate activated heptahelical receptors, leading to their uncoupling from G proteins. Here we report six crystal structures of rhodopsin kinase (GRK1), revealing not only three distinct nucleotide-binding states of a GRK but also two key structural elements believed to be involved in the recognition of activated GPCRs. The first is the C-terminal extension of the kinase domain, which was observed in all nucleotide-bound GRK1 structures. The second is residues 5-30 of the N terminus, observed in one of the GRK1.(Mg2+)2.ATP structures. The N terminus was also clearly phosphorylated, leading to the identification of two novel phosphorylation sites by mass spectral analysis. Co-localization of the N terminus and the C-terminal extension near the hinge of the kinase domain suggests that activated GPCRs stimulate kinase activity by binding to this region to facilitate full closure of the kinase domain.

Structures of rhodopsin kinase in different ligand states reveal key elements involved in G protein-coupled receptor kinase activation.,Singh P, Wang B, Maeda T, Palczewski K, Tesmer JJ J Biol Chem. 2008 May 16;283(20):14053-62. Epub 2008 Mar 13. PMID:18339619<ref>PMID:18339619</ref>

==See Also==

*[[Rhodopsin kinase|Rhodopsin kinase]]

<references/>

</StructureSection>

[[Category: Large Structures]]

[[Category: Singh P]]

[[Category: Tesmer JJG]]