Hydrolysis of trehalose phosphate, catalyzed by OtsB2, gives trehalose. The enzyme needs magnesium for its activity. A second homologue, OtsB1 is non-functional (De Smet et al, 2000; Edavana et al, 2004).
De Smet, KA,
trehalose-phosphatase activity of OtsB-Mg2+ [cytosol]