3sjq

X-ray diffraction
1.9Å resolution

Crystal structure of a small conductance potassium channel splice variant complexed with calcium-calmodulin

Released:
Source organism: Rattus norvegicus

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
PDBe Complex ID:
PDB-CPX-144036 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Calmodulin-1 Chains: A, B
Molecule details ›
Chains: A, B
Length: 149 amino acids
Theoretical weight: 16.85 KDa
Source organism: Rattus norvegicus
Expression system: Escherichia coli
UniProt:
  • Canonical: P0DP29 (Residues: 1-149; Coverage: 100%)
Gene names: CaMI, Calm, Calm1, Cam, Cam1
Sequence domains: EF-hand domain pair
Small conductance calcium-activated potassium channel protein 2 Chains: C, D
Molecule details ›
Chains: C, D
Length: 87 amino acids
Theoretical weight: 10.44 KDa
Source organism: Rattus norvegicus
Expression system: Escherichia coli
UniProt:
  • Canonical: P70604 (Residues: 412-462, 463-487; Coverage: 13%)
Gene name: Kcnn2
Sequence domains: Calmodulin binding domain
Structure domains: Helix Hairpins

Ligands and Environments

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X29A
Spacegroup: P1
Unit cell:
a: 47.74Å b: 65.63Å c: 66.08Å
α: 90.68° β: 110.45° γ: 111.02°
R-values:
R R work R free
0.171 0.17 0.2
Expression system: Escherichia coli