PIP5K1B is a symbol for the gene, Phosphatidylinositol-4-phosphate 5-kinase, type I, beta, in humans. Other names include: Phosphatidylinositol 4-phosphate 5-kinase type-1 beta; PIP5K1-beta; PtdIns(4)P-5-kinase 1 beta; Phosphatidylinositol 4-phosphate 5-kinase type I beta; PIP5KIbeta; Protein STM-7; Type I phosphatidylinositol 4-phosphate 5-kinase beta; STM7. The encoded protein is an enzyme with an amino acid length of 540 and a mass of 61.0 kDa. Other isoforms may exist. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.