Members of this family are predicted to have an alpha/beta hydrolase fold. They contain a predicted Ser-His-Asp catalytic triad, in which the serine is likely to act as a nucleophile [1].

1: Protein domain of unknown function DUF1023 is an alpha/beta hydrolase. Zheng M, Ginalski K, Rychlewski L, Grishin NV; Proteins. 2005;59:1-6. PMID:15688435