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1.6.5.10: NADPH dehydrogenase (quinone)

This is an abbreviated version!
For detailed information about NADPH dehydrogenase (quinone), go to the full flat file.

Word Map on EC 1.6.5.10

Reaction

NADPH
+
H+
+
a quinone
=
NADP+
+
a quinol

Synonyms

AKR1C9, ArsH, azoreductase, CBR4, dehydrogenase, reduced nicotinamide adenine dinucleotide phosphate (quinone), EC 1.6.99.6, MdaB, More, NADPH oxidase, NADPH quinone oxidoreductase, NADPH quinone oxidoreductase 1, NADPH quinone reductase, NADPH-dependent quinone reductase, NADPH-quinone oxidoreductase, NADPH:quinone oxidoreductase 1, NQO1, PA1225, PpAzoR, XAC2229, Zta1p

ECTree

     1 Oxidoreductases
         1.6 Acting on NADH or NADPH
             1.6.5 With a quinone or similar compound as acceptor
                1.6.5.10 NADPH dehydrogenase (quinone)

pH Optimum

pH Optimum on EC 1.6.5.10 - NADPH dehydrogenase (quinone)

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pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
6.5 - 7.5
-
-
7.4
-
assay at
8
-
assay at
9.1
calculation from nucleotide sequence
additional information
the pH dependency of 9,10-phenanthrenequinone reduction catalyzed by the wild-type enzyme is different to that observed for 3-ketosteroid reduction. The kcat value for 9,10-phenanthrenequinone reduction is pH-dependent with the maximal rate decreasing with increasing pH but reveals an ionizable group with a pKb of 8.90 that must be protonated for maximal activity