X-ray diffraction
3.15Å resolution

Crystal Structure of the PAS repeat region of the Drosophila clock protein PERIOD


Function and Biology Details

Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Period circadian protein Chains: A, B
Molecule details ›
Chains: A, B
Length: 368 amino acids
Theoretical weight: 41.46 KDa
Source organism: Drosophila melanogaster
Expression system: Escherichia coli BL21(DE3)
  • Canonical: P07663 (Residues: 232-599; Coverage: 30%)
Gene names: CG2647, per
Sequence domains:
Structure domains:

Ligands and Environments

No bound ligands
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE ID14-2
Spacegroup: P43
Unit cell:
a: 140.44Å b: 140.44Å c: 61.45Å
α: 90° β: 90° γ: 90°
R R work R free
0.228 0.228 0.277
Expression system: Escherichia coli BL21(DE3)