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23FD

Cryo-EM structure of human ATR-ATRIP complex with ATPgammaS, Chk1 and TopBp1

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, B
(A, B)
Serine/threonine-protein kinase ATRpolymer2644301756.82UniProt (Q13535)Homo sapiens (human)Ataxia telangiectasia and Rad3-related protein,FRAP-related protein 1
2C, D
(C, D)
ATR-interacting proteinpolymer79185940.72UniProt (Q8WXE1)Homo sapiens (human)ATM and Rad3-related-interacting protein
3E, F
(E, F)
Serine/threonine-protein kinase Chk1polymer141550.72UniProt (O14757)Homo sapiensCHK1 checkpoint homolog,Cell cycle checkpoint kinase,Checkpoint kinase-1
4G, H
(G, H)
DNA topoisomerase 2-binding protein 1polymer54561099.62UniProt (Q92547)Homo sapiens (human)DNA topoisomerase II-beta-binding protein 1,TopBP1,DNA topoisomerase II-binding protein 1
5I, L
(A, B)
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTERnon-polymer523.22Chemie (AGS)
6J, K, M, N
(A, B)
MAGNESIUM IONnon-polymer24.34Chemie (MG)
PubChem (888)
7O, P
(C, D)
ZINC IONnon-polymer65.42Chemie (ZN)
PubChem (32051)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains8
Total formula weight900695.5
Non-Polymers*Number of molecules8
Total formula weight1274.5
All*Total formula weight901970.1
*Water molecules are not included.

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PDB entries from 2026-08-26

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