Structure of PDB 2qx9 Chain A

Receptor sequence
>2qx9A (length=230) Species: 9606 (Homo sapiens) [Search protein sequence]
AGKKVLIVYAHQEPKSFNGSLKNVAVDELSRQGCTVTVSDLYAMNFEPRA
TDKDITGTLSNPEVFNYGVETHEAYKQRSLASDITDEQKKVREADLVIFQ
FPLYWFSVPAILKGWMDRVLCQGFAFDIPGFYDSGLLQGKLALLSVTTGG
TAEMYTKTGVNGDSRYFLWPLQHGTLHFCGFKVLAPQISFAPEIASEEER
KGMVAAWSQRLQTIWKEEPIPCTAHWHFGQ
3D structure
PDB2qx9 Kinetic, thermodynamic and X-ray structural insights into the interaction of melatonin and analogues with quinone reductase 2.
ChainA
Resolution2.31 Å
3D
structure
Catalytic site residues are labeled in the structure
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Enzymatic activity
Catalytic site (original residue number in PDB) G149 Y155 N161
Catalytic site (residue number reindexed from 1) G149 Y155 N161
Enzyme Commision number 1.10.5.1: ribosyldihydronicotinamide dehydrogenase (quinone).
Interaction with ligand
Site
#		 Ligand Ligand
chain		 Binding residues on receptor
(original residue number in PDB)		 Binding residues on receptor
(residue number reindexed from 1)		 Binding affinity
BS01 FAD A H11 S16 F17 N18 S20 L103 Y104 W105 F106 T147 T148 G149 G150 Y155 E193 R200 K201 H11 S16 F17 N18 S20 L103 Y104 W105 F106 T147 T148 G149 G150 Y155 E193 R200 K201
BS02 ML2 A F126 I128 F178 F126 I128 F178 MOAD: Kd=0.7uM
BindingDB: IC50=1100nM,Ki=6.5nM
BS03 ZN A H173 H177 C222 H173 H177 C222
BS04 FAD A G68 D117 G68 D117
Gene Ontology
Molecular Function
GO:0001512 dihydronicotinamide riboside quinone reductase activity
GO:0003955 NAD(P)H dehydrogenase (quinone) activity
GO:0005515 protein binding
GO:0008270 zinc ion binding
GO:0009055 electron transfer activity
GO:0016491 oxidoreductase activity
GO:0016661 oxidoreductase activity, acting on other nitrogenous compounds as donors
GO:0031404 chloride ion binding
GO:0042803 protein homodimerization activity
GO:0046872 metal ion binding
GO:0071949 FAD binding
GO:1904408 melatonin binding
GO:1905594 resveratrol binding
Biological Process
GO:1901662 quinone catabolic process
Cellular Component
GO:0005654 nucleoplasm
GO:0005737 cytoplasm
GO:0005829 cytosol
GO:0070062 extracellular exosome

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Cellular Component
External links
PDB RCSB:2qx9, PDBe:2qx9, PDBj:2qx9
PDBsum2qx9
PubMed18254726
UniProtP16083|NQO2_HUMAN Ribosyldihydronicotinamide dehydrogenase [quinone] (Gene Name=NQO2)

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