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4QE9

Open MthK pore structure soaked in 10 mM Ba2+/100 mM K+

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(A)
Calcium-gated potassium channel MthKpolymer839148.71UniProt (O27564)
Pfam (PF07885)
Methanothermobacter thermautotrophicus
2B, C, D, E, F...
(A)
POTASSIUM IONnon-polymer39.16Chemie (K)
3H
(A)
waterwater18.043Chemie (HOH)
Sequence modifications
A: 18 - 100 (UniProt: O27564)
PDBExternal DatabaseDetails
His 68Ser 68engineered mutation
Cys 77Val 77engineered mutation
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains1
Total formula weight9148.7
Non-Polymers*Number of molecules6
Total formula weight234.6
All*Total formula weight9383.3
*Water molecules are not included.

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PDB entries from 2025-12-17

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