Associated with membrane proliferation. a 1,2-diacyl-sn-glycero-3-phospho-(1D-myo-inositol) + ATP = a 1,2-diacyl-sn-glycero-3-phospho-(1D-myo-inositol-3-phosphate) + ADP + H(+) Repressed during nodule organogenesis and reinduced in mature nodules. Belongs to the PI3/PI4-kinase family.