Tagaturonate reductase (EC1.1.1.58) is an enzyme that catalyzes the chemical reaction

Thus, the two substrates of this enzyme are D-altronate and NAD, whereas its 3 products are D-tagaturonate, NADH, and H.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD or NADP as acceptor. The systematic name of this enzyme class is D-altronate:NAD 3-oxidoreductase. Other names in common use include altronic oxidoreductase, altronate oxidoreductase, TagUAR, altronate dehydrogenase, and D-tagaturonate reductase. This enzyme participates in pentose and glucuronate interconversions.