Pyranose dehydrogenase (acceptor) (, pyranose dehydrogenase, pyranose-quinone oxidoreductase, quinone-dependent pyranose dehydrogenase, PDH) is an enzyme with systematic name pyranose:acceptor oxidoreductase. This enzyme catalyses the following chemical reaction
(1) a pyranose + acceptor a pyranos-2-ulose (or a pyranos-3-ulose or a pyranos-2,3-diulose) + reduced acceptor (2) a pyranoside + acceptor a pyranosid-3-ulose (or a pyranosid-3,4-diulose) + reduced acceptor
This enzyme requires FAD. A number of aldoses and ketoses in pyranose form, as well as glycosides, gluco-oligosaccharides, sucrose and lactose can act as a donor.
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