Members of this family are prephenate dehydrogenases (PDHs) EC:1.3.1.12 involved in tyrosine biosynthesis. This is the N-terminal nucleotide-binding domain of PDHs, which has a modified Rossmann nucleotide-binding fold with an extended beta-sheet sandwiched by three helices on each face [1].

1: Structural and biochemical analysis of Bacillus anthracis prephenate dehydrogenase reveals an unusual mode of inhibition by tyrosine via the ACT domain. Shabalin IG, Gritsunov A, Hou J, Slawek J, Miks CD, Cooper DR, Minor W, Christendat D; FEBS J. 2020;287:2235-2255. PMID:31750992