AKR15A family of aldo-keto reductase and similar proteins
The AKR15 family includes Microbacterium luteolum pyridoxal 4-dehydrogenase (PLD), Pseudomonas sp. D-threo-aldose 1-dehydrogenase (FDH) and similar proteins. PLD (EC1.1.1.107) catalyzes irreversible oxidation of pyridoxal. FDH (EC1.1.1.122), also called (2S,3R)-aldose dehydrogenase, or L-fucose dehydrogenase, catalyzes the oxidation of L-fucose to L-fuconolactone in the presence of NADP(+). It is also active against L-galactose and, to a much lesser degree, D-arabinose. FDH (EC1.1.1.122), also called (2S,3R)-aldose dehydrogenase, or L-fucose dehydrogenase, catalyzes the oxidation of L-fucose to L-fuconolactone in the presence of NADP(+). It is also active against L-galactose and, to a much lesser degree, D-arabinose. The family also includes L-galactose dehydrogenase (L-galDH) and D-arabinose 1-dehydrogenase (ARA2). L-galDH (EC 1.1.1.316), also called L-galactose 1-dehydrogenase, catalyzes the oxidation of L-galactose to L-galactono-1,4-lactone in the presence of NAD(+). It uses NAD(+) as a hydrogen acceptor much more efficiently than NADP(+). ARA2 (EC1.1.1.116), also called NAD(+)-specific D-arabinose dehydrogenase, catalyzes the the oxidation of D-arabinose to D-arabinono-1,4-lactone in the presence of NAD(+).
Comment:Based on the structure evidence that Rattus norvegicus voltage-dependent K+ channel beta subunit (3EAU) in complex with cortisone and cofactor NADPH.
Jiyao W et al.(2023). "The conserved domain database in 2023.",