IP6 is phosphorylated to 1-PP-IP5 by PPIP5K1/2 in the cytosol
IP6 + ATP → 1-PP-IP5 + ADP
- Reactome
- R-HSA-1855216
- Compartment
- cytosol
- Rhea
- RHEA:37460
Inputs
- IP6CHEBI:58130, C6H6O24P6, cytosol
- ATPCHEBI:30616, C10H12N5O13P3, cytosol
Outputs
- 1-PP-IP5CHEBI:74946, C6H6O27P7, cytosol
- ADPCHEBI:456216, C10H12N5O10P2, cytosol
Catalysed by
- inositol hexakisphosphate kinase activity of PPIP5K1/2 [cytosol]
Literature
- Cloning and characterization of two human VIP1-like inositol hexakisphosphate and diphosphoinositol pentakisphosphate kinases J Biol Chem, 2007
- A conserved family of enzymes that phosphorylate inositol hexakisphosphate Science, 2007
- Purification, sequencing, and molecular identification of a mammalian PP-InsP5 kinase that is activated when cells are exposed to hyperosmotic stress J Biol Chem, 2007
- Structural analysis and detection of biological inositol pyrophosphates reveal that the family of VIP/diphosphoinositol pentakisphosphate kinases are 1/3-kinases J Biol Chem, 2009
- Structural basis for an inositol pyrophosphate kinase surmounting phosphate crowding Nat. Chem. Biol., 2012