Catalysis of the reaction: 1-phosphatidyl-1D-myo-inositol + ATP = a 1-phosphatidyl-1D-myo-inositol 3-phosphate + ADP + 2 H+. [EC:2.7.1.137, RHEA:12709]
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C5: Ontology GO: Gene Ontology GO:MF: GO Molecular Function