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9Y5Q

Cryo EM structure of KCa3.1_R355K_I/calmodulin channel in complex with rimtuzalcap

This is a non-PDB format compatible entry.
Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, B, C, D
(A, B, C, D)
Intermediate conductance calcium-activated potassium channel protein 4polymer37842570.64UniProt (O15554)
Pfam (PF03530)
Pfam (PF07885)
Pfam (PF02888)
Homo sapiens (human)SKCa 4,SKCa4,hSK4,Gardos channel,IKCa1,hIK1,KCa3.1,Putative Gardos channel,hKCa4
2E, F, G, H
(E, F, G, H)
Calmodulin-1polymer14616521.14UniProt (P0DP23)
Pfam (PF13499)
Homo sapiens (human)
3I
(C)
POTASSIUM IONnon-polymer39.11Chemie (K)
4J, L, N, P
(E, F, G, H)
Rimtuzalcapnon-polymer378.44Chemie (A1B92)
5K, M, O, Q
(E, F, G, H)
CALCIUM IONnon-polymer40.14Chemie (CA)
Sequence modifications
A, B, C, D: 9 - 386 (UniProt: O15554)
PDBExternal DatabaseDetails
Lys 355Arg 355engineered mutation
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains8
Total formula weight236366.8
Non-Polymers*Number of molecules9
Total formula weight1713.1
All*Total formula weight238079.9
*Water molecules are not included.

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PDB entries from 2026-01-21

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