Catalytic activity:ATP + 1D-myo-inositol 1,3,4,5,6-pentakisphosphate = ADP + 1D-myo-inositol hexakisphosphate.,Domain:The EXKPK motif is conserved in inositol-pentakisphosphate 2-kinases of both family 1 and 2.,Function:Phosphorylates Ins(1,3,4,5,6)P5 at position 2 to form Ins(1,2,3,4,5,6)P6 (InsP6 or phytate). InsP6 is involved in many processes such as mRNA export, non-homologous end-joining, endocytosis, ion channel regulation. It also protects cells from TNF-alpha-induced apoptosis.,similarity:Belongs to the IPK1 type 2 family.,tissue specificity:Ubiquitously expressed, with high expression in heart, brain, testis and placenta.,
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