5JWR

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of the day-night transition in a bacterial circadian clock.

Tseng, R.Goularte, N.F.Chavan, A.Luu, J.Cohen, S.E.Chang, Y.G.Heisler, J.Li, S.Michael, A.K.Tripathi, S.Golden, S.S.LiWang, A.Partch, C.L.

(2017) Science 355: 1174-1180

  • DOI: 10.1126/science.aag2516
  • Primary Citation of Related Structures:  
    5JWO, 5JWQ, 5JWR, 5JYT, 5JYU, 5JYV

  • PubMed Abstract: 
  • 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 ...

    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.


    Organizational Affiliation

    Center for Circadian Biology, University of California, San Diego, La Jolla, CA 92093, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Circadian clock protein kinase KaiCA, C247Thermosynechococcus vestitus BP-1Mutation(s): 2 
Gene Names: kaiCtlr0483
EC: 2.7.11.1
UniProt
Find proteins for Q79V60 (Thermosynechococcus elongatus (strain BP-1))
Explore Q79V60 
Go to UniProtKB:  Q79V60
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Circadian clock protein KaiBB, D99Thermosynechococcus vestitus BP-1Mutation(s): 4 
Gene Names: kaiBtlr0482
UniProt
Find proteins for Q79V61 (Thermosynechococcus elongatus (strain BP-1))
Explore Q79V61 
Go to UniProtKB:  Q79V61
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Circadian clock protein KaiAE, F, G, H145Thermosynechococcus vestitus BP-1Mutation(s): 1 
Gene Names: kaiAtlr0481
UniProt
Find proteins for Q79V62 (Thermosynechococcus elongatus (strain BP-1))
Explore Q79V62 
Go to UniProtKB:  Q79V62
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download Ideal Coordinates CCD File 
I [auth A], J [auth C]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.188 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.595α = 107.27
b = 79.105β = 90.71
c = 80.838γ = 111.2
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM107521
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM107069

Revision History  (Full details and data files)

  • Version 1.0: 2017-03-29
    Type: Initial release
  • Version 1.1: 2017-09-20
    Changes: Author supporting evidence
  • Version 1.2: 2019-12-25
    Changes: Author supporting evidence