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EC 2.7.1.151 Details
EC number
2.7.1.151
Accepted name
inositol-polyphosphate multikinase
Reaction
2 ATP + 1D-myo-inositol 1,4,5-trisphosphate = 2 ADP + 1D-myo-inositol 1,3,4,5,6-pentakisphosphate (overall reaction);;(1a) ATP + 1D-myo-inositol 1,4,5-trisphosphate = ADP + 1D-myo-inositol 1,4,5,6-tetrakisphosphate;;(1b) ATP + 1D-myo-inositol 1,4,5,6-tetrakisphosphate = ADP + 1D-myo-inositol 1,3,4,5,6-pentakisphosphate
Other name(s)
IpK2, IP3/IP4 6-/3-kinase, IP3/IP4 dual-specificity 6-/3-kinase, IpmK, ArgRIII, AtIpk2α, AtIpk2β, inositol polyphosphate 6-/3-/5-kinase
Systematic name
ATP:1D-myo-inositol-1,4,5-trisphosphate 6-phosphotransferase
CAS registry number
9077-69-4
Comment
This enzyme also phosphorylates Ins(1,4,5)P3 to Ins(1,3,4,5)P4, Ins(1,3,4,5)P4 to Ins(1,3,4,5,6)P5, and Ins(1,3,4,5,6)P4 to Ins(PP)P4, isomer unknown. The enzyme from the plant Arabidopsis thaliana can also phosphorylate Ins(1,3,4,6)P4 and Ins(1,2,3,4,6)P5 at the D-5-position to produce 1,3,4,5,6-pentakisphosphate and inositol hexakisphosphate (InsP6), respectively [3]. Yeast produce InsP6 from Ins(1,4,5)P3 by the actions of this enzyme and EC 2.7.1.158, inositol-pentakisphosphate 2-kinase [4].
History
created 2002, modified 2006
EC Tree
2.7.1.9 created 1961, deleted 1965
2.7.1.57 created 1972, deleted 1984
2.7.1.70 created 1972, deleted 2004
2.7.1.75 created 1972, deleted 1976
2.7.1.96 created 1978, deleted 1978
2.7.1.97 created 1978, deleted 1992
2.7.1.98 created 1978, deleted 1984
2.7.1.111 created 1984, deleted 1992
2.7.1.133 created 1990, deleted 2002
2.7.1.139 created 1992, deleted 2002
2.7.1.152 created 2002, deleted 2003