This domain is found at the C-terminus of yeast D-serine dehydratase [1]. Structures have been solved for two bacterial members of this family. The yeast protein has been shown to be a zinc dependant enzyme.

1: A novel zinc-dependent D-serine dehydratase from Saccharomyces cerevisiae. Ito T, Hemmi H, Kataoka K, Mukai Y, Yoshimura T; Biochem J. 2008;409:399-406. PMID:17937657