Phosphoinositide phosphatase that hydrolyzes PtdIns(3)P and PtdIns(4)P. A number of isoforms are produced. According to EST sequences. Ubiquitous with a higher level of expression in young seedlings than in other tissues. The phosphatase catalytic core motif (or RXNCXDCLDRTN motif) from the SAC domain is found in metal-independent protein phosphatases and inositol polyphosphate phosphatases.