› 1r8j

X-ray diffraction
2.03Å resolution

Crystal Structure of Circadian Clock Protein KaiA from Synechococcus elongatus

Released:
DOI: 10.2210/pdb1r8j/pdb
PDB entry 1r8j coloured by chain, front view.
PDB entry 1r8j coloured by chain, side view.
PDB entry 1r8j coloured by chain, top view.
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
Primary publication:
Crystal structure of circadian clock protein KaiA from Synechococcus elongatus.
Ye S, Vakonakis I, Ioerger TR, LiWang AC, Sacchettini JC
J Biol Chem 279 20511-8 (2004)
PMID: 15007067

Function and Biology Details

Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:
Structure domains:

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-181282 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Circadian clock oscillator protein KaiA Chains: A, B
Molecule details ›
Chains: A, B
Length: 289 amino acids
Theoretical weight: 33.14 KDa
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
Expression system: Escherichia coli BL21
UniProt:
  • Canonical: Q79PF6 (Residues: 2-284; Coverage: 100%)
Gene names: Synpcc7942_1218, kaiA, see0009
Sequence domains:
Structure domains:

Ligands and Environments

No bound ligands
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 19-ID
Spacegroup: P21
Unit cell:
a: 47.111Å b: 125.818Å c: 56.818Å
α: 90° β: 114.9° γ: 90°
R-values:
R R work R free
0.213 0.21 0.271
Expression system: Escherichia coli BL21

Quick links

Citations

12 review citations

The cyanobacterial circadian system: from biophysics to bioevolution.
Johnson et al. (2011)
11 more

13 mentions without citation

A cyanobacterial circadian clockwork.
Johnson et al. (2008)
12 more