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==Crystal structure of the phosphorylation-site mutant S431A of the KaiC circadian clock protein==
==Crystal structure of the phosphorylation-site mutant S431A of the KaiC circadian clock protein==
<StructureSection load='3k0a' size='340' side='right' caption='[[3k0a]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
<StructureSection load='3k0a' size='340' side='right'caption='[[3k0a]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3k0a]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Synechococcus_elongatus_pcc_7942 Synechococcus elongatus pcc 7942]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3K0A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3K0A FirstGlance]. <br>
<table><tr><td colspan='2'>[[3k0a]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Synechococcus_elongatus_PCC_7942_=_FACHB-805 Synechococcus elongatus PCC 7942 = FACHB-805]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3K0A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3K0A FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></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=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3dvl|3dvl]], [[3jzm|3jzm]], [[3k09|3k09]], [[3k0c|3k0c]], [[3k0e|3k0e]], [[3k0f|3k0f]]</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=3k0a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3k0a OCA], [https://pdbe.org/3k0a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3k0a RCSB], [https://www.ebi.ac.uk/pdbsum/3k0a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3k0a ProSAT]</span></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">kaic, see0011, Synpcc7942_1216 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1140 Synechococcus elongatus PCC 7942])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-specific_serine/threonine_protein_kinase Non-specific serine/threonine protein kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.11.1 2.7.11.1] </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=3k0a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3k0a OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3k0a RCSB], [http://www.ebi.ac.uk/pdbsum/3k0a PDBsum]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/KAIC_SYNE7 KAIC_SYNE7]] Core component of the KaiABC clock protein complex, which constitutes the main circadian regulator in cyanobacteria. Binds to DNA. The KaiABC complex may act as a promoter-nonspecific transcription regulator that represses transcription, possibly by acting on the state of chromosome compaction.<ref>PMID:9727980</ref> <ref>PMID:14709675</ref>
[https://www.uniprot.org/uniprot/KAIC_SYNE7 KAIC_SYNE7] Core component of the KaiABC clock protein complex, which constitutes the main circadian regulator in cyanobacteria. Binds to DNA. The KaiABC complex may act as a promoter-nonspecific transcription regulator that represses transcription, possibly by acting on the state of chromosome compaction.<ref>PMID:9727980</ref> <ref>PMID:14709675</ref>  
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/k0/3k0a_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/k0/3k0a_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
   </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/chain_selection.php?pdb_ID=2ata ConSurf].
</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=3k0a ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
<div style="background-color:#fffaf0;">
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
</div>
<div class="pdbe-citations 3k0a" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Circadian clock protein|Circadian clock protein]]
*[[Circadian clock protein 3D structures|Circadian clock protein 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Non-specific serine/threonine protein kinase]]
[[Category: Large Structures]]
[[Category: Synechococcus elongatus pcc 7942]]
[[Category: Synechococcus elongatus PCC 7942 = FACHB-805]]
[[Category: Egli, M]]
[[Category: Egli M]]
[[Category: Pattanayek, R]]
[[Category: Pattanayek R]]
[[Category: Pattanayek, S]]
[[Category: Pattanayek S]]
[[Category: Atp-binding]]
[[Category: Biological rhythm]]
[[Category: Circadian clock protein]]
[[Category: Dna-binding]]
[[Category: Hexamer]]
[[Category: Kaic]]
[[Category: Kinase]]
[[Category: Magnesium]]
[[Category: Metal-binding]]
[[Category: Nucleotide-binding]]
[[Category: Phosphoprotein]]
[[Category: Repressor]]
[[Category: Serine/threonine-protein kinase]]
[[Category: Transcription]]
[[Category: Transcription regulation]]
[[Category: Transferase]]

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