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| | ==Bovine G Protein Coupled Receptor Kinase 1 in Complex with Paroxetine== | | ==Bovine G Protein Coupled Receptor Kinase 1 in Complex with Paroxetine== |
| - | <StructureSection load='4l9i' size='340' side='right' caption='[[4l9i]], [[Resolution|resolution]] 2.32Å' scene=''> | + | <StructureSection load='4l9i' size='340' side='right'caption='[[4l9i]], [[Resolution|resolution]] 2.32Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4l9i]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Bovin Bovin]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4L9I OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4L9I FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4l9i]] 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=4L9I OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4L9I FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=8PR:PAROXETINE'>8PR</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=8PR:PAROXETINE'>8PR</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3c50|3c50]], [[3v5w|3v5w]], [[4mk0|4mk0]]</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=4l9i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4l9i OCA], [https://pdbe.org/4l9i PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4l9i RCSB], [https://www.ebi.ac.uk/pdbsum/4l9i PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4l9i ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GRK1, RHOK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9913 BOVIN])</td></tr>
| + | |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Rhodopsin_kinase Rhodopsin kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.14 2.7.11.14] </span></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=4l9i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4l9i OCA], [http://pdbe.org/4l9i PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4l9i RCSB], [http://www.ebi.ac.uk/pdbsum/4l9i PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4l9i ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/RK_BOVIN RK_BOVIN]] Retina-specific kinase involved in the signal turnoff via phosphorylation of rhodopsin (RHO), the G protein- coupled receptor that initiates the phototransduction cascade. This rapid desensitization is essential for scotopic vision and permits rapid adaptation to changes in illumination (By similarity). | + | [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> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 4l9i" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 4l9i" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[Rhodopsin kinase|Rhodopsin kinase]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bovin]] | + | [[Category: Bos taurus]] |
| - | [[Category: Rhodopsin kinase]] | + | [[Category: Large Structures]] |
| - | [[Category: Homan, K T]] | + | [[Category: Homan KT]] |
| - | [[Category: Tesmer, J J.G]] | + | [[Category: Tesmer JJG]] |
| - | [[Category: Agc family kinase]]
| + | |
| - | [[Category: G protein coupled receptor kinase]]
| + | |
| - | [[Category: Gpcr]]
| + | |
| - | [[Category: Grk]]
| + | |
| - | [[Category: Grk1]]
| + | |
| - | [[Category: Hydrolyase]]
| + | |
| - | [[Category: Membrane protein-inhibitor complex]]
| + | |
| - | [[Category: Phosphorylation]]
| + | |
| - | [[Category: Rgs homology domain]]
| + | |
| - | [[Category: Ser/thr kinase]]
| + | |
| - | [[Category: Ssri]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
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][1] [2] [3]
Publication Abstract from PubMed
Recently we identified the serotonin reuptake inhibitor paroxetine as an inhibitor of G protein-coupled receptor kinase 2 (GRK2) that improves cardiac performance in live animals. Paroxetine exhibits up to 50-fold selectivity for GRK2 versus other GRKs. A better understanding of the molecular basis of this selectivity is important for the development of even more selective and potent small molecule therapeutics and chemical genetic probes. We first sought to understand the molecular mechanisms underlying paroxetine selectivity among GRKs. We directly measured the KD for paroxetine and assessed its mechanism of inhibition for each of the GRK subfamilies and then determined the atomic structure of its complex with GRK1, the most weakly inhibited GRK tested. Our results suggest that the selectivity of paroxetine for GRK2 largely reflects its lower affinity for adenine nucleotides. Thus, stabilization of off-pathway conformational states unique to GRK2 will likely be key for the development of even more selective inhibitors. Next, we designed a benzolactam derivative of paroxetine that has optimized interactions with the hinge of the GRK2 kinase domain. The crystal structure of this compound in complex with GRK2 confirmed the predicted interactions. Although the benzolactam derivative did not significantly alter potency of inhibition among GRKs, it exhibited 20-fold lower inhibition of serotonin reuptake. However, there was an associated increase in the potency for inhibition of other AGC kinases, suggesting that the unconventional hydrogen bond formed by the benzodioxole ring of paroxetine is better accommodated by GRKs.
Structural and functional analysis of g protein-coupled receptor kinase inhibition by paroxetine and a rationally designed analog.,Homan KT, Wu E, Wilson MW, Singh P, Larsen SD, Tesmer JJ Mol Pharmacol. 2014 Feb;85(2):237-48. doi: 10.1124/mol.113.089631. Epub 2013 Nov , 12. PMID:24220010[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Weiergraber OH, Senin II, Philippov PP, Granzin J, Koch KW. Impact of N-terminal myristoylation on the Ca2+-dependent conformational transition in recoverin. J Biol Chem. 2003 Jun 20;278(25):22972-9. Epub 2003 Apr 9. PMID:12686556 doi:10.1074/jbc.M300447200
- ↑ Higgins MK, Oprian DD, Schertler GF. Recoverin binds exclusively to an amphipathic peptide at the N terminus of rhodopsin kinase, inhibiting rhodopsin phosphorylation without affecting catalytic activity of the kinase. J Biol Chem. 2006 Jul 14;281(28):19426-32. doi: 10.1074/jbc.M602203200. Epub 2006 , May 4. PMID:16675451 doi:http://dx.doi.org/10.1074/jbc.M602203200
- ↑ Zernii EY, Komolov KE, Permyakov SE, Kolpakova T, Dell'orco D, Poetzsch A, Knyazeva EL, Grigoriev II, Permyakov EA, Senin II, Philippov PP, Koch KW. Involvement of the recoverin C-terminal segment in recognition of the target enzyme rhodopsin kinase. Biochem J. 2011 Apr 15;435(2):441-50. doi: 10.1042/BJ20110013. PMID:21299498 doi:http://dx.doi.org/10.1042/BJ20110013
- ↑ Homan KT, Wu E, Wilson MW, Singh P, Larsen SD, Tesmer JJ. Structural and functional analysis of g protein-coupled receptor kinase inhibition by paroxetine and a rationally designed analog. Mol Pharmacol. 2014 Feb;85(2):237-48. doi: 10.1124/mol.113.089631. Epub 2013 Nov , 12. PMID:24220010 doi:http://dx.doi.org/10.1124/mol.113.089631
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