Phosphatase that specifically hydrolyzes the 5-phosphate of inositol 1,4,5-trisphosphate to inositol 1,4-bisphosphate, and inositol 1,3,4,5-tetrasphosphate to inositol 1,3,4-trisphosphate (PubMed:40969890, PubMed:8013665, PubMed:8626616, PubMed:8769125). Plays a crucial role in the survival of cerebellar Purkinje cells (By similarity). {ECO:0000250|UniProtKB:Q7TNC9, ECO:0000269|PubMed:40969890, ECO:0000269|PubMed:8013665, ECO:0000269|PubMed:8626616, ECO:0000269|PubMed:8769125}. This is the function of INPP5A (inositol polyphosphate-5-phosphatase A, Ensembl gene identifier ENSG00000068383).