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1gy3

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[[Image:1gy3.jpg|left|200px]]
 
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==pCDK2/cyclin A in complex with MgADP, nitrate and peptide substrate==
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The line below this paragraph, containing "STRUCTURE_1gy3", creates the "Structure Box" on the page.
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<StructureSection load='1gy3' size='340' side='right'caption='[[1gy3]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1gy3]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GY3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GY3 FirstGlance]. <br>
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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]] 2.7&#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=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene>, <scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></td></tr>
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{{STRUCTURE_1gy3| PDB=1gy3 | SCENE= }}
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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=1gy3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gy3 OCA], [https://pdbe.org/1gy3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gy3 RCSB], [https://www.ebi.ac.uk/pdbsum/1gy3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gy3 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CCNA2_HUMAN CCNA2_HUMAN] Essential for the control of the cell cycle at the G1/S (start) and the G2/M (mitosis) transitions.
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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/gy/1gy3_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=1gy3 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Eukaryotic protein kinases catalyze the phosphoryl transfer of the gamma-phosphate of ATP to the serine, threonine, or tyrosine residue of protein substrates. The catalytic mechanism of phospho-CDK2/cyclin A (pCDK2/cyclin A) has been probed with structural and kinetic studies using the trigonal NO(3)(-) ion, which can be viewed as a mimic of the metaphosphate transition state. The crystal structure of pCDK2/cyclin A in complex with Mg(2+)ADP, nitrate, and a heptapeptide substrate has been determined at 2.7 A. The nitrate ion is located between the beta-phosphate of ADP and the hydroxyl group of the serine residue of the substrate. In one molecule of the asymmetric unit, the nitrate is close to the beta-phosphate of ADP (distance from the nitrate nitrogen to the nearest beta-phosphate oxygen of 2.5 A), while in the other subunit, the nitrate is closer to the substrate serine (distance of 2.1 A). Kinetic studies demonstrate that nitrate is not an effective inhibitor of protein kinases, consistent with the structural results that show the nitrate ion makes few stabilizing interactions with CDK2 at the catalytic site. The binding of orthovanadate was also investigated as a mimic of a pentavalent phosphorane intermediate of an associative mechanism for phosphoryl transfer. No vanadate was observed bound in a 3.4 A resolution structure of pCDK2/cyclin A in the presence of Mg(2+)ADP, and vanadate did not inhibit the kinase reaction. The results support the notion that the protein kinase reaction proceeds through a mostly dissociative mechanism with a trigonal planar metaphosphate intermediate rather than an associative mechanism that involves a pentavalent phosphorane intermediate.
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'''PCDK2/CYCLIN A IN COMPLEX WITH MGADP, NITRATE AND PEPTIDE SUBSTRATE'''
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Structural studies on phospho-CDK2/cyclin A bound to nitrate, a transition state analogue: implications for the protein kinase mechanism.,Cook A, Lowe ED, Chrysina ED, Skamnaki VT, Oikonomakos NG, Johnson LN Biochemistry. 2002 Jun 11;41(23):7301-11. PMID:12044161<ref>PMID:12044161</ref>
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==Overview==
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Eukaryotic protein kinases catalyze the phosphoryl transfer of the gamma-phosphate of ATP to the serine, threonine, or tyrosine residue of protein substrates. The catalytic mechanism of phospho-CDK2/cyclin A (pCDK2/cyclin A) has been probed with structural and kinetic studies using the trigonal NO(3)(-) ion, which can be viewed as a mimic of the metaphosphate transition state. The crystal structure of pCDK2/cyclin A in complex with Mg(2+)ADP, nitrate, and a heptapeptide substrate has been determined at 2.7 A. The nitrate ion is located between the beta-phosphate of ADP and the hydroxyl group of the serine residue of the substrate. In one molecule of the asymmetric unit, the nitrate is close to the beta-phosphate of ADP (distance from the nitrate nitrogen to the nearest beta-phosphate oxygen of 2.5 A), while in the other subunit, the nitrate is closer to the substrate serine (distance of 2.1 A). Kinetic studies demonstrate that nitrate is not an effective inhibitor of protein kinases, consistent with the structural results that show the nitrate ion makes few stabilizing interactions with CDK2 at the catalytic site. The binding of orthovanadate was also investigated as a mimic of a pentavalent phosphorane intermediate of an associative mechanism for phosphoryl transfer. No vanadate was observed bound in a 3.4 A resolution structure of pCDK2/cyclin A in the presence of Mg(2+)ADP, and vanadate did not inhibit the kinase reaction. The results support the notion that the protein kinase reaction proceeds through a mostly dissociative mechanism with a trigonal planar metaphosphate intermediate rather than an associative mechanism that involves a pentavalent phosphorane intermediate.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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1GY3 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GY3 OCA].
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</div>
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<div class="pdbe-citations 1gy3" style="background-color:#fffaf0;"></div>
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==Reference==
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==See Also==
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Structural studies on phospho-CDK2/cyclin A bound to nitrate, a transition state analogue: implications for the protein kinase mechanism., Cook A, Lowe ED, Chrysina ED, Skamnaki VT, Oikonomakos NG, Johnson LN, Biochemistry. 2002 Jun 11;41(23):7301-11. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12044161 12044161]
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*[[Cyclin 3D structures|Cyclin 3D structures]]
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*[[Cyclin-dependent kinase 3D structures|Cyclin-dependent kinase 3D structures]]
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== References ==
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<references/>
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Protein complex]]
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[[Category: Large Structures]]
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[[Category: Chrysina, E D.]]
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[[Category: Synthetic construct]]
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[[Category: Cook, A.]]
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[[Category: Chrysina ED]]
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[[Category: Johnson, L N.]]
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[[Category: Cook A]]
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[[Category: Lowe, E D.]]
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[[Category: Johnson LN]]
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[[Category: Oikonomakos, N G.]]
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[[Category: Lowe ED]]
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[[Category: Skamnaki, V T.]]
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[[Category: Oikonomakos NG]]
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[[Category: Cell cycle regulatory protein kinase]]
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[[Category: Skamnaki VT]]
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[[Category: Thr160-phospho-cyclin dependent protein kinase 2 in association with cyclin some]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:10:02 2008''
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Current revision

pCDK2/cyclin A in complex with MgADP, nitrate and peptide substrate

PDB ID 1gy3

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