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5jwr

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==Crystal structure of foldswitch-stabilized KaiB in complex with the N-terminal CI domain of KaiC and a dimer of KaiA C-terminal domains from Thermosynechococcus elongatus==
==Crystal structure of foldswitch-stabilized KaiB in complex with the N-terminal CI domain of KaiC and a dimer of KaiA C-terminal domains from Thermosynechococcus elongatus==
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<StructureSection load='5jwr' size='340' side='right' caption='[[5jwr]], [[Resolution|resolution]] 2.61&Aring;' scene=''>
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<StructureSection load='5jwr' size='340' side='right'caption='[[5jwr]], [[Resolution|resolution]] 2.61&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[5jwr]] is a 8 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JWR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5JWR FirstGlance]. <br>
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<table><tr><td colspan='2'>[[5jwr]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermosynechococcus_vestitus_BP-1 Thermosynechococcus vestitus BP-1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JWR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5JWR 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=PO4:PHOSPHATE+ION'>PO4</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]] 2.61&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5jwq|5jwq]], [[5jwo|5jwo]]</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=PO4:PHOSPHATE+ION'>PO4</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=5jwr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jwr OCA], [https://pdbe.org/5jwr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5jwr RCSB], [https://www.ebi.ac.uk/pdbsum/5jwr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5jwr 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=5jwr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jwr OCA], [http://pdbe.org/5jwr PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5jwr RCSB], [http://www.ebi.ac.uk/pdbsum/5jwr PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5jwr ProSAT]</span></td></tr>
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</table>
</table>
== Function ==
== Function ==
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[[http://www.uniprot.org/uniprot/KAIC_THEEB KAIC_THEEB]] 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 (By similarity).[HAMAP-Rule:MF_01836] [[http://www.uniprot.org/uniprot/KAIA_THEEB KAIA_THEEB]] Component of the KaiABC clock protein complex, which constitutes the main circadian regulator in cyanobacteria. The KaiABC complex may act as a promoter-nonspecific transcription regulator that represses transcription, possibly by acting on the state of chromosome compaction. In the complex, it enhances the phosphorylation status of KaiC. In contrast, the presence of KaiB in the complex decreases the phosphorylation status of KaiC, suggesting that KaiB acts by antagonizing the interaction between KaiA and KaiC. A KaiA dimer is sufficient to enhance KaiC hexamer phosphorylation. [[http://www.uniprot.org/uniprot/KAIB_THEEB KAIB_THEEB]] Component of the KaiABC clock protein complex, which constitutes the main circadian regulator in cyanobacteria. The KaiABC complex may act as a promoter-non-specific transcription regulator that represses transcription, possibly by acting on the state of chromosome compaction. In the complex, it decreases the phosphorylation status of KaiC. It has no effect on KaiC by itself, but instead needs the presence of both KaiA and KaiC, suggesting that it acts by antagonizing the interaction between KaiA and KaiC.[HAMAP-Rule:MF_01835]
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[https://www.uniprot.org/uniprot/KAIC_THEVB KAIC_THEVB] 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 (By similarity).
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Circadian clocks are ubiquitous timing systems that induce rhythms of biological activities in synchrony with night and day. In cyanobacteria, timing is generated by a posttranslational clock consisting of KaiA, KaiB, and KaiC proteins and a set of output signaling proteins, SasA and CikA, which transduce this rhythm to control gene expression. Here, we describe crystal and nuclear magnetic resonance structures of KaiB-KaiC,KaiA-KaiB-KaiC, and CikA-KaiB complexes. They reveal how the metamorphic properties of KaiB, a protein that adopts two distinct folds, and the post-adenosine triphosphate hydrolysis state of KaiC create a hub around which nighttime signaling events revolve, including inactivation of KaiA and reciprocal regulation of the mutually antagonistic signaling proteins, SasA and CikA.
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Structural basis of the day-night transition in a bacterial circadian clock.,Tseng R, Goularte NF, Chavan A, Luu J, Cohen SE, Chang YG, Heisler J, Li S, Michael AK, Tripathi S, Golden SS, LiWang A, Partch CL Science. 2017 Mar 17;355(6330):1174-1180. doi: 10.1126/science.aag2516. Epub 2017, Mar 16. PMID:28302851<ref>PMID:28302851</ref>
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==See Also==
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*[[Circadian clock protein 3D structures|Circadian clock protein 3D structures]]
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 5jwr" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__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: Chang, Y G]]
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[[Category: Thermosynechococcus vestitus BP-1]]
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[[Category: Chavan, A]]
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[[Category: Chang YG]]
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[[Category: Goularte, N F]]
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[[Category: Chavan A]]
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[[Category: Heilser, J]]
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[[Category: Goularte NF]]
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[[Category: LiWang, A]]
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[[Category: Heilser J]]
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[[Category: Luu, J]]
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[[Category: LiWang A]]
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[[Category: Partch, C L]]
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[[Category: Luu J]]
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[[Category: Tripathi, S]]
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[[Category: Partch CL]]
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[[Category: Tseng, R]]
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[[Category: Tripathi S]]
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[[Category: Foldswitch]]
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[[Category: Tseng R]]
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[[Category: Transcription regulator]]
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Current revision

Crystal structure of foldswitch-stabilized KaiB in complex with the N-terminal CI domain of KaiC and a dimer of KaiA C-terminal domains from Thermosynechococcus elongatus

PDB ID 5jwr

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