ID 1.1.1.187 DE GDP-4-dehydro-D-rhamnose reductase. AN GDP-4-keto-6-deoxy-D-mannose reductase. AN GDP-4-keto-D-rhamnose reductase. AN guanosine diphosphate-4-keto-D-rhamnose reductase. CA (1) GDP-alpha-D-rhamnose + NAD(+) = GDP-4-dehydro-alpha-D-rhamnose + H(+) CA + NADH. CA (2) GDP-alpha-D-rhamnose + NADP(+) = GDP-4-dehydro-alpha-D-rhamnose + CA H(+) + NADPH. CA (3) GDP-6-deoxy-alpha-D-talose + NADP(+) = GDP-4-dehydro-alpha-D-rhamnose CA + H(+) + NADPH. CA (4) GDP-6-deoxy-alpha-D-talose + NAD(+) = GDP-4-dehydro-alpha-D-rhamnose CA + H(+) + NADH. CC -!- The enzyme, which operates in the opposite direction to that shown, CC forms a mixture of GDP-alpha-D-rhamnose and its C-4 epimer, GDP-6- CC deoxy-alpha-D-talose. cf. EC 1.1.1.135 and EC 1.1.1.281. //