X-ray diffraction
1.55Å resolution

Wild-type MthK pore in 50 mM K+


Function and Biology Details

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

Structure analysis Details

Assembly composition:
homo tetramer (preferred)
Entry contents:
1 distinct polypeptide molecule
Calcium-gated potassium channel MthK Chain: A
Molecule details ›
Chain: A
Length: 82 amino acids
Theoretical weight: 8.98 KDa
Source organism: Methanothermobacter thermautotrophicus
Expression system: Escherichia coli
  • Canonical: O27564 (Residues: 18-99; Coverage: 24%)
Gene names: MTH_1520, mthK
Sequence domains: Ion channel

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X25
Spacegroup: P4212
Unit cell:
a: 63.811Å b: 63.811Å c: 44.05Å
α: 90° β: 90° γ: 90°
R R work R free
0.194 0.192 0.21
Expression system: Escherichia coli