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4FM9

Human topoisomerase II alpha bound to DNA

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(A)
DNA topoisomerase 2-alphapolymer76388157.61UniProt (P11388)
Pfam (PF01751)
Pfam (PF16898)
Pfam (PF00521)
Homo sapiens (human)DNA topoisomerase II, alpha isozyme
2B
(C)
DNA (5'-D(P*GP*AP*GP*GP*AP*TP*GP*AP*CP*GP*AP*TP*G)-3')polymer134080.71synthetic construct
3C
(D)
DNA (5'-D(*CP*GP*CP*GP*CP*AP*TP*CP*GP*TP*CP*AP*TP*CP*CP*TP*C)-3')polymer175099.31synthetic construct
4D, F
(A, C)
MAGNESIUM IONnon-polymer24.32Chemie (MG)
5E
(A)
GLYCEROLnon-polymer92.11Chemie (GOL)
6G, H, I
(A, C, D)
waterwater18.044Chemie (HOH)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains3
Total formula weight97337.6
Non-Polymers*Number of molecules3
Total formula weight140.7
All*Total formula weight97478.3
*Water molecules are not included.

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PDB entries from 2025-12-10

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