Phosphoinositides-binding protein that induces the formation of planar or gently curved membrane structures. Binds to phosphoinositides, including to phosphatidylinositol 4,5-bisphosphate (PtdIns(4,5)P2) headgroups. There seems to be no clear preference for a specific phosphoinositide (By similarity). . This is the function of BAIAP2L2 (BAR/IMD domain containing adaptor protein 2 like 2, ENSG00000128298).