1x8b

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[[Image:1x8b.gif|left|200px]]<br /><applet load="1x8b" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1x8b, resolution 1.81&Aring;" />
 
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'''Structure of human Wee1A kinase: kinase domain complexed with inhibitor PD0407824'''<br />
 
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==Overview==
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==Structure of human Wee1A kinase: kinase domain complexed with inhibitor PD0407824==
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Phosphorylation is critical to regulation of the eukaryotic cell cycle. Entry to mitosis is triggered by the cyclin-dependent kinase CDK1 (Cdc2), which is inactivated during the preceding S and G2 phases by phosphorylation of T14 and Y15. Two homologous kinases, Wee1, which phosphorylates Y15, and Myt1, which phosphorylates both T14 and Y15, mediate this inactivation. We have determined the crystal structure of the catalytic domain of human somatic Wee1 (Wee1A) complexed with an active-site inhibitor at 1.8 A resolution. Although Wee1A is functionally a tyrosine kinase, in sequence and structure it most closely resembles serine/threonine kinases such as Chk1 and cAMP kinases. The crystal structure shows that although the catalytic site closely resembles that of other protein kinases, the activation segment contains Wee1-specific features that maintain it in an active conformation and, together with a key substitution in its glycine-rich loop, help determine its substrate specificity.
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<StructureSection load='1x8b' size='340' side='right'caption='[[1x8b]], [[Resolution|resolution]] 1.81&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1x8b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X8B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1X8B FirstGlance]. <br>
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1X8B is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=MG:'>MG</scene> and <scene name='pdbligand=824:'>824</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Transferase Transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.10.1 and 2.7.10.2 2.7.10.1 and 2.7.10.2] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1X8B 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]] 1.81&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=824:9-HYDROXY-4-PHENYLPYRROLO[3,4-C]CARBAZOLE-1,3(2H,6H)-DIONE'>824</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
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==Reference==
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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=1x8b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1x8b OCA], [https://pdbe.org/1x8b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1x8b RCSB], [https://www.ebi.ac.uk/pdbsum/1x8b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1x8b ProSAT]</span></td></tr>
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Structure and inhibition of the human cell cycle checkpoint kinase, Wee1A kinase: an atypical tyrosine kinase with a key role in CDK1 regulation., Squire CJ, Dickson JM, Ivanovic I, Baker EN, Structure. 2005 Apr;13(4):541-50. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15837193 15837193]
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/WEE1_HUMAN WEE1_HUMAN] Acts as a negative regulator of entry into mitosis (G2 to M transition) by protecting the nucleus from cytoplasmically activated cyclin B1-complexed CDK1 before the onset of mitosis by mediating phosphorylation of CDK1 on 'Tyr-15'. Specifically phosphorylates and inactivates cyclin B1-complexed CDK1 reaching a maximum during G2 phase and a minimum as cells enter M phase. Phosphorylation of cyclin B1-CDK1 occurs exclusively on 'Tyr-15' and phosphorylation of monomeric CDK1 does not occur. Its activity increases during S and G2 phases and decreases at M phase when it is hyperphosphorylated. A correlated decrease in protein level occurs at M/G1 phase, probably due to its degradation.
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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/x8/1x8b_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=1x8b ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Transferase]]
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[[Category: Baker EN]]
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[[Category: Baker, E N.]]
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[[Category: Dickson JM]]
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[[Category: Dickson, J M.]]
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[[Category: Ivanovic I]]
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[[Category: Ivanovic, I.]]
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[[Category: Squire CJ]]
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[[Category: Squire, C J.]]
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[[Category: 824]]
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[[Category: MG]]
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[[Category: cell cycle]]
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[[Category: kinase]]
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[[Category: wee1]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:52:01 2008''
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Current revision

Structure of human Wee1A kinase: kinase domain complexed with inhibitor PD0407824

PDB ID 1x8b

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