1.5.1.25 thiomorpholine 3-carboxylate + NAD(P)+ = 3,4-dehydro-thiomorpholine-3-carboxylate + NAD(P)H + H+ classical ping-pong mechanism 1.5.1.25 thiomorpholine 3-carboxylate + NAD(P)+ = 3,4-dehydro-thiomorpholine-3-carboxylate + NAD(P)H + H+ in silico docking of various ligands into the active site of the X-ray structure of the enzyme suggests an unusual catalytic mechanism involving an arginine residue as a proton donor 1.5.1.25 thiomorpholine 3-carboxylate + NAD(P)+ = 3,4-dehydro-thiomorpholine-3-carboxylate + NAD(P)H + H+ in silico docking of various ligands into the active site of the X-ray structure of the enzyme suggests an unusual catalytic mechanism involving an arginine residue as a proton donor, proposed mechanism for the reaction catalyzed by ketimine reductase/CRYM, overview 1.5.1.25 thiomorpholine 3-carboxylate + NAD(P)+ = 3,4-dehydro-thiomorpholine-3-carboxylate + NAD(P)H + H+ the enzyme binds 2-oxo acids, such as pyruvate, in solution, and catalyzes the formation of N-alkyl-amino acids from alkylamines and 2-oxo acids via reduction of imine intermediates. Mechanistically, ketimine reductase/CRYM acts as a classical imine reductase 1.5.1.25 thiomorpholine 3-carboxylate + NAD(P)+ = 3,4-dehydro-thiomorpholine-3-carboxylate + NAD(P)H + H+ proposed catalytic mechanism of ketimine reductase