This narrow family includes genes from Arabidopsis and Fibrobacter succinogenes (which probably recieved the gene from a plant via lateral gene transfer). The sequences are distantly related to the dihydrodipicolinate reductases from archaea. In Fibrobacter this gene is the only candidate DHPR in the genome. [Amino acid biosynthesis, Aspartate family]
Jiyao W et al.(2023). "The conserved domain database in 2023.",