Members of this protein family are 2-oxopent-4-enoate hydratase, which is also called 2-hydroxypent-2,4-dienoate hydratase. It is closely related to another gene found in the same operon, 4-oxalocrotonate decarboxylase, with which it interacts closely.
Jiyao W et al.(2023). "The conserved domain database in 2023.",