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4QOI

Crystal structure of FMN quinone reductase 2 in complex with melatonin at 1.55A

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, B
(A, B)
Ribosyldihydronicotinamide dehydrogenase [quinone]polymer23125980.52UniProt (P16083)
Pfam (PF02525)
Homo sapiens (human)NRH dehydrogenase [quinone] 2, NRH:quinone oxidoreductase 2, Quinone reductase 2, QR2
2C, F
(A, B)
FLAVIN MONONUCLEOTIDEnon-polymer456.32Chemie (FMN)
3D, G
(A, B)
ZINC IONnon-polymer65.42Chemie (ZN)
4E, H
(A, B)
N-[2-(5-methoxy-1H-indol-3-yl)ethyl]acetamidenon-polymer232.32Chemie (ML1)
5I, J
(A, B)
waterwater18.0304Chemie (HOH)
Sequence modifications
A, B: 0 - 230 (UniProt: P16083)
PDBExternal DatabaseDetails
Phe 46Leu 47variant
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains2
Total formula weight51961.1
Non-Polymers*Number of molecules6
Total formula weight1508.1
All*Total formula weight53469.1
*Water molecules are not included.

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PDB entries from 2025-07-16

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