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