ID 2.7.1.151 DE Inositol-polyphosphate multikinase. AN Inositol polyphosphate 6-/3-/5-kinase. AN IP3/IP4 6-/3-kinase. AN IP3/IP4 dual-specificity 6-/3-kinase. AN IpK2. CA 2 ATP + 1D-myo-inositol 1,4,5-trisphosphate = 2 ADP + 1D-myo-inositol CA 1,3,4,5,6-pentakisphosphate. CC -!- This enzyme also phosphorylates Ins(1,4,5)P(3) to Ins(1,3,4,5)P(4), CC Ins(1,3,4,5)P(4) to Ins(1,3,4,5,6)P(5), and Ins(1,3,4,5,6)P(4) to CC Ins(PP)P(4), isomer unknown. CC -!- The enzyme from the plant Arabidopsis thaliana can also phosphorylate CC Ins(1,3,4,6)P(4) and Ins(1,2,3,4,6)P(5) at the D-5-position to CC produce 1,3,4,5,6-pentakisphosphate and inositol hexakisphosphate CC (InsP(6)), respectively. CC -!- Yeast produces InsP(6) from Ins(1,4,5)P(3) by the actions of this CC enzyme and EC 2.7.1.158. DR A2X5H5, IPK2_ORYSI ; Q6H545, IPK2_ORYSJ ; Q9LY23, IPMKA_ARATH; DR Q9FLT2, IPMKB_ARATH; Q8NFU5, IPMK_HUMAN ; Q7TT16, IPMK_MOUSE ; DR Q99NI4, IPMK_RAT ; P07250, IPMK_YEAST ; //