Reaction catalyzed by 4-hydroxy-tetrahydrodipicolinate reductase (1.17.1.8)

		+			=			+
	2,3-dihydrodipicolinate	+		reduced 3-acetylpyridine adenine dinucleotide	=		2,3,4,5-tetrahydrodipicolinate	+		oxidized 3-acetylpyridine adenine dinucleotide