2a9h

Solution NMR

NMR structural studies of a potassium channel / charybdotoxin complex

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero pentamer (preferred)
PDBe Complex ID:
PDB-CPX-141095 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
pH-gated potassium channel KcsA Chains: A, B, C, D
Molecule details ›
Chains: A, B, C, D
Length: 155 amino acids
Theoretical weight: 16.72 KDa
Source organism: Streptomyces lividans
Expression system: Escherichia coli
UniProt:
  • Canonical: P0A334 (Residues: 1-132; Coverage: 83%)
Gene names: kcsA, skc1
Sequence domains:
Structure domains: Helix Hairpins
Potassium channel toxin alpha-KTx 1.1 Chain: E
Molecule details ›
Chain: E
Length: 37 amino acids
Theoretical weight: 4.31 KDa
Source organism: Leiurus hebraeus
Expression system: Not provided
UniProt:
  • Canonical: P13487 (Residues: 23-59; Coverage: 100%)
Sequence domains: Scorpion short toxin, BmKK2

Ligands and Environments

No bound ligands
1 modified residue:

Experiments and Validation Details

Entry percentile scores
Refinement method: molecular SIMULATED ANNEALING / dynamics / docking
Expression systems:
  • Escherichia coli
  • Not provided