X-ray diffraction
1.76Å resolution

Crystal structure of N-terminal domain of KaiC


Function and Biology Details

Reaction catalysed:
ATP + a protein = ADP + a phosphoprotein
Biochemical function:
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo hexamer (preferred)
Entry contents:
1 distinct polypeptide molecule
Circadian clock protein kinase KaiC Chains: A, B, C
Molecule details ›
Chains: A, B, C
Length: 253 amino acids
Theoretical weight: 28.38 KDa
Source organism: Synechococcus elongatus PCC 7942
Expression system: Escherichia coli
  • Canonical: Q79PF4 (Residues: 1-253; Coverage: 49%)
Gene names: Synpcc7942_1216, kaiC, see0011
Sequence domains: KaiC
Structure domains: P-loop containing nucleotide triphosphate hydrolases

Ligands and Environments

3 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SPRING-8 BEAMLINE BL44XU
Spacegroup: C2
Unit cell:
a: 134.823Å b: 81.057Å c: 95.64Å
α: 90° β: 132.87° γ: 90°
R R work R free
0.17 0.169 0.208
Expression system: Escherichia coli