Non-classical phosphatidylinositol (PtdIns) transfer protein (PITP), which exhibits PtdIns-binding/transfer activity in the absence of detectable PtdCho-binding/transfer activity. Regulates PtdIns(4,5)P2 homeostasis at the plasma membrane. Heme-binding protein that may play a role in organic oxidant-induced stress responses. a 1,2-diacyl-sn-glycero-3-phospho-(1D-myo-inositol)(in) = a 1,2-diacyl-sn-glycero-3-phospho-(1D-myo-inositol)(out) Belongs to the SFH5 family.