This domain adopts a Rossmann NAD binding fold. The C-terminal domain of homoserine dehydrogenase contributes a single helix to this structural domain, which is not included in the Pfam model.
Homoserine dehydrogenase belongs to the oxioreductase class of enzymes, although the residues implicated in catalysis are quite different from other enzymes within the class. It is involved in the NAD(P)H dependent reduction of L-aspartate semi-aldehyde to L homoserine, a pathway not found within the animal kingdom. The enzyme has therefore been targeted for the development of antimycotic drugs.
Defined by 2 residues: ASP:A-218 [auth A-219]LYS:A-222 [auth A-223]