label: inositol hexakisphosphate 5-kinase activity
label_lc: inositol hexakisphosphate 5-kinase activity
description: "Catalysis of the reaction: 1D-myo-inositol hexakisphosphate + ATP = 5-diphospho-1D-myo-inositol 1,2,3,4,6-pentakisphosphate + ADP."