4tle

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==Crystal structure of N-terminal C1 domain of KaiC==
==Crystal structure of N-terminal C1 domain of KaiC==
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<StructureSection load='4tle' size='340' side='right' caption='[[4tle]], [[Resolution|resolution]] 1.94&Aring;' scene=''>
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<StructureSection load='4tle' size='340' side='right'caption='[[4tle]], [[Resolution|resolution]] 1.94&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4tle]] is a 6 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4TLE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4TLE FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4tle]] 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=4TLE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4TLE FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AGS:PHOSPHOTHIOPHOSPHORIC+ACID-ADENYLATE+ESTER'>AGS</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
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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]] 1.936&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4tl6|4tl6]], [[4tl7|4tl7]], [[4tl8|4tl8]], [[4tl9|4tl9]], [[4tla|4tla]], [[4tlb|4tlb]], [[4tlc|4tlc]], [[4tld|4tld]]</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=AGS:PHOSPHOTHIOPHOSPHORIC+ACID-ADENYLATE+ESTER'>AGS</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
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<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>
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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=4tle FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4tle OCA], [https://pdbe.org/4tle PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4tle RCSB], [https://www.ebi.ac.uk/pdbsum/4tle PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4tle ProSAT]</span></td></tr>
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<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=4tle FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4tle OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4tle RCSB], [http://www.ebi.ac.uk/pdbsum/4tle PDBsum]</span></td></tr>
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</table>
</table>
== Function ==
== Function ==
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[[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>
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[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>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Circadian clocks generate slow and ordered cellular dynamics, but consist of fast-moving bio-macromolecules; consequently, the origins of the overall slowness remain unclear. We identified the adenosine triphosphate catalytic region (ATPase) in the N-terminal half of the clock protein KaiC as the minimal pacemaker that controls the in vivo frequency of the cyanobacterial clock. Crystal structures of the ATPase revealed that the slowness of this ATPase arises from sequestration of a lytic water molecule in an unfavorable position and coupling of ATP hydrolysis to a peptide isomerization with high activation energy. The slow ATPase is coupled with another ATPase catalyzing autodephosphorylation in the C-terminal half of KaiC, yielding the circadian response frequency of intermolecular interactions with other clock-related proteins that influences the transcription and translation cycle.
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Atomic-scale origins of slowness in the cyanobacterial circadian clock.,Abe J, Hiyama TB, Mukaiyama A, Son S, Mori T, Saito S, Osako M, Wolanin J, Yamashita E, Kondo T, Akiyama S Science. 2015 Jun 25. pii: 1261040. PMID:26113637<ref>PMID:26113637</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
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</div>
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*[[Circadian clock protein 3D structures|Circadian clock protein 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Non-specific serine/threonine protein kinase]]
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[[Category: Large Structures]]
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[[Category: Abe, J]]
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[[Category: Synechococcus elongatus PCC 7942 = FACHB-805]]
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[[Category: Akiyama, S]]
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[[Category: Abe J]]
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[[Category: Hiyama, T B]]
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[[Category: Akiyama S]]
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[[Category: Mukaiyama, A]]
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[[Category: Hiyama TB]]
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[[Category: Son, S]]
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[[Category: Mukaiyama A]]
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[[Category: Serine/threonine-protein kinase]]
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[[Category: Son S]]
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[[Category: Transferase]]
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Current revision

Crystal structure of N-terminal C1 domain of KaiC

PDB ID 4tle

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