Members of this protein family are tyrosine 2,3-aminomutase. It is variable from member to member as to whether the (R)-beta-Tyr or (S)-beta-Tyr is the preferred product from L-Tyr. This enzyme tends to occur in secondary metabolite biosynthesis systems, as in the production of chondramides in Chondromyces crocatus. This class of enzyme has a prosthetic group, MIO (4-methylideneimidazol-5-one), that forms posttranslationally from an Ala-Ser-Gly motif.
Jiyao W et al.(2023). "The conserved domain database in 2023.",