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12AI

Structure of mammalian Type 2 Inositol 1,4,5-trisphosphate receptor (IP3R2) in the presence of IP3/Ca2+/ATP

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, B, C, D
(A, B, C, D)
Inositol 1,4,5-trisphosphate-gated calcium channel ITPR2polymer2701307854.74UniProt (Q9Z329)Mus musculus (house mouse)IP3 receptor isoform 2,IP3R 2,InsP3R2,Inositol 1,4,5-trisphosphate receptor type 2,5-trisphosphate type V receptor,Type 2 inositol 1,5-trisphosphate receptor,Type 2 InsP3 receptor
2E, J, O, T
(A, B, C, D)
ZINC IONnon-polymer65.44Chemie (ZN)
3F, K, P, U
(A, B, C, D)
ADENOSINE-5'-TRIPHOSPHATEnon-polymer507.24Chemie (ATP)
4G, L, Q, V
(A, B, C, D)
D-MYO-INOSITOL-1,4,5-TRIPHOSPHATEnon-polymer420.14Chemie (I3P)
5H, M, R, W
(A, B, C, D)
CALCIUM IONnon-polymer40.14Chemie (CA)
6I, N, S, X
(A, B, C, D)
(9R,11S)-9-({[(1S)-1-HYDROXYHEXADECYL]OXY}METHYL)-2,2-DIMETHYL-5,7,10-TRIOXA-2LAMBDA~5~-AZA-6LAMBDA~5~-PHOSPHAOCTACOSANE-6,6,11-TRIOLnon-polymer767.14Chemie (PLX)
Sequence modifications
A, B, C, D: 1 - 2701 (UniProt: Q9Z329)
PDBExternal DatabaseDetails
Asp 1004Asn 1004conflict
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains4
Total formula weight1231418.9
Non-Polymers*Number of molecules20
Total formula weight7199.6
All*Total formula weight1238618.5
*Water molecules are not included.

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PDB entries from 2026-07-29

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