- PDB-2fy8: Crystal structure of MthK rck domain in its ligand-free gating-ri... -
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Basic information
Entry
Database: PDB / ID: 2fy8
Title
Crystal structure of MthK rck domain in its ligand-free gating-ring form
Components
Calcium-gated potassium channel mthK
Keywords
TRANSPORT PROTEIN / Transport / Ionic channel / Alternative initiation / Transmembrane / Ion transport / Potassium / Potassium transport / Membrane / gating ring / closed conformation / partially open conformation / transition state
Function / homology
Function and homology information
monoatomic cation transmembrane transporter activity / potassium ion transport / metal ion binding / identical protein binding / plasma membrane Similarity search - Function
The biological assembly is an octamer. There are two tetramers in an asymmetric unit. The first octamer can be generated from the first tetramer (polypeptide chain A, B, C and D) by the operation: ROTATION MATRIX -1.000 0.000 0.000 0.000 1.000 0.000 0.000 0.000 -1.000 TRANSLATION VECTOR 0.00000 0.00000 126.374 The first octamer has the 422 symmetry, representing the closed conformation of mthK gating ring. The second octamer can be generated from the second tetramer (polypeptide chain E, F, G and H) by the operation: ROTATION MATRIX -1.000 0.000 0.000 0.000 1.000 0.000 0.000 0.000 -1.000 TRANSLATION VECTOR 0.00000 0.00000 126.374 The second octamer is an asymmetric, parcially open mthK gating ring, which might represent a gating ring conformation in transition state.
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Components
#1: Protein
Calcium-gatedpotassiumchannelmthK
Mass: 25447.000 Da / Num. of mol.: 8 / Fragment: soluble isoform, residues 107-336 / Mutation: D184N Source method: isolated from a genetically manipulated source Source: (gene. exp.) Methanothermobacter thermautotrophicus (archaea) Gene: mthK / Plasmid: pQE70 / Production host: Escherichia coli (E. coli) / Strain (production host): SG13009 / References: UniProt: O27564
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