uncharacterized family of the haloacid dehalogenase-like superfamily, similar to uncharacterized Drosophila melanogaster rhythmically expressed gene 2 protein and human haloacid dehalogenase-like hydrolase domain-containing protein 3
The haloacid dehalogenase-like (HAD) hydrolases are a large superfamily of diverse enzymes that catalyze carbon or phosphoryl group transfer reactions on a range of substrates, using an active site aspartate in nucleophilic catalysis. Members include 2-L-haloalkanoic acid dehalogenase (C-Cl bond hydrolysis), azetidine hydrolase (C-N bond hydrolysis); phosphonoacetaldehyde hydrolase (C-P bond hydrolysis), phosphoserine phosphatase and phosphomannomutase (CO-P bond hydrolysis), P-type ATPases (PO-P bond hydrolysis) and many others. Members are found in all three kingdoms of life, and most genomes are predicted to contain multiple HAD-like proteins. Members possess a highly conserved alpha/beta core domain, and many also possess a small cap domain, the fold and function of which is variable. HAD hydrolases are sometimes referred to as belonging to the DDDD superfamily of phosphohydrolases.