inositol hexakisphosphate 3-kinase activity
Catalysis of the reaction: ATP + 1D-myo-inositol hexakisphosphate = ADP + 3-diphospho-1D-myo-inositol (1,2,4,5,6)pentakisphosphate.
GO:0000828
inositol hexakisphosphate kinase activity
is_a