5JYU | pdb_00005jyu

NMR structure of pseudo receiver domain of CikA from Thermosynechococcus elongatus

• PDB DOI: https://doi.org/10.2210/pdb5JYU/pdb
• BMRB: 30092

• Classification: Sigaling protein
• Organism(s): Thermosynechococcus vestitus BP-1
• Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
• Mutation(s): No 


• Deposited: 2016-05-15 Released: 2017-03-29 
• Deposition Author(s): Tseng, R.D., LiWang, A.L.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

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

• PubMed: 28302851 
• DOI: https://doi.org/10.1126/science.aag2516
• Primary Citation 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. 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: 
• Quantitative and Systems Biology, University of California, Merced, CA 95343, USA.
Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA.
School of Natural Sciences, University of California, Merced, CA 95343, USA.
Center for Circadian Biology, University of California, San Diego, La Jolla, CA 92093, USA.
Chemistry and Chemical Biology, University of California, Merced, CA 95343, USA.
Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093, USA.
Quantitative and Systems Biology, University of California, Merced, CA 95343, USA. [e-mail] [e-mail].
Health Sciences Research Institute, University of California, Merced, CA 95343, USA.
Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA. [e-mail] [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 12.9 kDa 
• Atom Count: 907 
• Modeled Residue Count: 117 
• Deposited Residue Count: 117 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Two-component sensor histidine kinase	A	117	Thermosynechococcus vestitus BP-1	Mutation(s): 0  Gene Names: tll0899 EC: 2.7.13.3
UniProt
Find proteins for Q8DKG0 (Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)) Explore Q8DKG0  Go to UniProtKB:  Q8DKG0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2017-03-29 
Deposition Author(s): Tseng, R.D., LiWang, A.L.

---

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM107521

Revision History  

• 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, Data collection
• Version 1.3: 2023-06-14
  Changes: Database references, Other
• Version 1.4: 2024-05-15
  Changes: Data collection, Database references