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4QHE

Crystal structure of Mg2+ bound human APE1

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(A)
DNA-(apurinic or apyrimidinic site) lyasepolymer28532011.41UniProt (P27695)
Pfam (PF03372)
Homo sapiens (human)APEX nuclease, APEN, Apurinic-apyrimidinic endonuclease 1, AP endonuclease 1, APE-1, REF-1, Redox factor-1, DNA-(apurinic or apyrimidinic site) lyase, mitochondrial
2B
(A)
MAGNESIUM IONnon-polymer24.31Chemie (MG)
3C, D, E, F, G...
(A)
1,2-ETHANEDIOLnon-polymer62.16Chemie (EDO)
4I
(A)
waterwater18.0249Chemie (HOH)
Sequence modifications
A: 38 - 318 (UniProt: P27695)
PDBExternal DatabaseDetails
Gly 34-expression tag
Ser 35-expression tag
His 36-expression tag
Met 37-expression tag
Ser 39Gly 39variant
Ala 138Cys 138engineered mutation
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains1
Total formula weight32011.4
Non-Polymers*Number of molecules7
Total formula weight396.7
All*Total formula weight32408.1
*Water molecules are not included.

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PDB entries from 2025-12-03

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