negative regulation of phosphatidylinositol-3,4,5-trisphosphate 5-phosphatase activity
negative regulation of phosphatidylinositol-3,4,5-trisphosphate 5-phosphatase activity
Any process that stops, prevents or reduces the frequency, rate or extent of phosphatidylinositol-3,4,5-trisphosphate 5-phosphatase activity.