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Crystal structure of N-terminal C1 domain of KaiC

X-ray diffraction
1.936Å resolution
PDB entry 4tl7 coloured by chain, front view.
PDB entry 4tl7 coloured by chain, side view.
PDB entry 4tl7 coloured by chain, top view.
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
Assembly composition:
homo hexamer (preferred)
Entry contents: 1 distinct polypeptide molecule

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Circadian clock oscillator protein KaiC
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Multimeric state: homo hexamer
Accessible surface area: 45587.39 Å2
Buried surface area: 23563.05 Å2
Dissociation area: 8,732.47 Å2
Dissociation energy (ΔGdiss): 62.16 kcal/mol
Dissociation entropy (TΔSdiss): 68.28 kcal/mol
Symmetry number: 6
PDBe Complex ID: PDB-CPX-181278

Macromolecules

Circadian clock oscillator protein KaiC
Chains: A, B, C, D, E, F
Length: 253 amino acids
Theoretical weight: 28.38 KDa
Source organism: Synechococcus elongatus PCC 7942 = FACHB-805
Expression system: Escherichia coli
UniProt:
  • Canonical: Q79PF4 (Residues: 1-253; Coverage: 49%)
Gene names: Synpcc7942_1216, kaiC, see0011
Pfam: KaiC
InterPro:
CATH: P-loop containing nucleotide triphosphate hydrolases
Circadian clock oscillator protein KaiC in PDB entry 4tl7, assembly 1, front view.
Circadian clock oscillator protein KaiC in PDB entry 4tl7, assembly 1, side view.
Circadian clock oscillator protein KaiC in PDB entry 4tl7, assembly 1, top view.
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