PDBe 1qx7

X-ray diffraction
3.09Å resolution

Crystal structure of apoCaM bound to the gating domain of small conductance Ca2+-activated potassium channel

Released:

Function and Biology Details

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

Structure analysis Details

Assemblies composition:
homo dimer
hetero dimer (preferred)
homo trimer
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Calmodulin-3 Chains: A, B, I, M, R
Molecule details ›
Chains: A, B, I, M, R
Length: 148 amino acids
Theoretical weight: 17.14 KDa
Source organism: Rattus norvegicus
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Best match: P0DP31 (Residues: 2-149)
Gene names: CaMIII, Calm3, Cam3, Camc
Small conductance calcium-activated potassium channel protein 2 Chain: D
Molecule details ›
Chain: D
Length: 85 amino acids
Theoretical weight: 10.22 KDa
Source organism: Rattus norvegicus
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Best match: P70604 (Residues: 411-487)
Gene name: Kcnn2

Ligands and Environments

No bound ligands

1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL1-5
Spacegroup: P41212
Unit cell:
a: 79.93Å b: 79.93Å c: 220.8Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.286 0.286 0.308
Expression system: Escherichia coli BL21(DE3)