EC:2.7.1.158; KEGG_REACTION:R05202; MetaCyc:RXN-7163; RHEA:20313; reactome:R-HSA-1855176 "I(1,3,4,5,6)P5 is phosphorylated to IP6 by IPPK (IP5-2K) in the nucleus"; reactome:R-HSA-1855179 "I(1,3,4,5,6)P5 is phosphorylated to IP6 by IPPK in the cytosol"