Phosphatidylinositol-4,5-bisphosphate, the precursor to second messengers of the phosphoinositide signal transduction pathways, is thought to be involved in the regulation of secretion, cell proliferation, differentiation, and motility. The protein encoded by this gene is one of a family of enzymes capable of catalyzing the phosphorylation of phosphatidylinositol-4-phosphate on the fifth hydroxyl of the myo-inositol ring to form phosphatidylinositol-4,5-bisphosphate. The amino acid sequence of this enzyme does not show homology to other kinases, but the recombinant protein does exhibit kinase activity. This gene is a member of the phosphatidylinositol-4-phosphate 5-kinase family.[3]
Clinical Importance
Through genome wide association studies (GWAS), some of the single nucleotide polymorphisms (SNPs) located in this gene have been noticed to be significantly associated with susceptibility of childhood acute lymphoblastic leukaemia in ethnically diverse populations.[4][5]
References
↑Boronenkov IV, Anderson RA (February 1995). "The sequence of phosphatidylinositol-4-phosphate 5-kinase defines a novel family of lipid kinases". The Journal of Biological Chemistry. 270 (7): 2881–4. doi:10.1074/jbc.270.7.2881. PMID7852364.
↑Rameh LE, Tolias KF, Duckworth BC, Cantley LC (November 1997). "A new pathway for synthesis of phosphatidylinositol-4,5-bisphosphate". Nature. 390 (6656): 192–6. doi:10.1038/36621. PMID9367159.
Loijens JC, Boronenkov IV, Parker GJ, Anderson RA (1996). "The phosphatidylinositol 4-phosphate 5-kinase family". Advances in Enzyme Regulation. 36: 115–40. doi:10.1016/0065-2571(95)00005-4. PMID8869744.
Niiro H, Clark EA (November 2003). "Branches of the B cell antigen receptor pathway are directed by protein conduits Bam32 and Carma1". Immunity. 19 (5): 637–40. doi:10.1016/S1074-7613(03)00303-0. PMID14614850.
Carpenter CL (April 2004). "Btk-dependent regulation of phosphoinositide synthesis". Biochemical Society Transactions. 32 (Pt 2): 326–9. doi:10.1042/BST0320326. PMID15046600.
Tolias KF, Cantley LC, Carpenter CL (July 1995). "Rho family GTPases bind to phosphoinositide kinases". The Journal of Biological Chemistry. 270 (30): 17656–9. doi:10.1074/jbc.270.30.17656. PMID7629060.
Rozenvayn N, Flaumenhaft R (March 2003). "Protein kinase C mediates translocation of type II phosphatidylinositol 5-phosphate 4-kinase required for platelet alpha-granule secretion". The Journal of Biological Chemistry. 278 (10): 8126–34. doi:10.1074/jbc.M206493200. PMID12509423.
Saito K, Tolias KF, Saci A, Koon HB, Humphries LA, Scharenberg A, Rawlings DJ, Kinet JP, Carpenter CL (November 2003). "BTK regulates PtdIns-4,5-P2 synthesis: importance for calcium signaling and PI3K activity". Immunity. 19 (5): 669–78. doi:10.1016/S1074-7613(03)00297-8. PMID14614854.
Schwab SG, Knapp M, Sklar P, Eckstein GN, Sewekow C, Borrmann-Hassenbach M, Albus M, Becker T, Hallmayer JF, Lerer B, Maier W, Wildenauer DB (September 2006). "Evidence for association of DNA sequence variants in the phosphatidylinositol-4-phosphate 5-kinase IIalpha gene (PIP5K2A) with schizophrenia". Molecular Psychiatry. 11 (9): 837–46. doi:10.1038/sj.mp.4001864. PMID16801950.
Bakker SC, Hoogendoorn ML, Hendriks J, Verzijlbergen K, Caron S, Verduijn W, Selten JP, Pearson PL, Kahn RS, Sinke RJ (March 2007). "The PIP5K2A and RGS4 genes are differentially associated with deficit and non-deficit schizophrenia". Genes, Brain, and Behavior. 6 (2): 113–9. doi:10.1111/j.1601-183X.2006.00234.x. PMID17410640.
He Z, Li Z, Shi Y, Tang W, Huang K, Ma G, Zhou J, Meng J, Li H, Feng G, He L (August 2007). "The PIP5K2A gene and schizophrenia in the Chinese population--a case-control study". Schizophrenia Research. 94 (1–3): 359–65. doi:10.1016/j.schres.2007.04.013. PMID17555944.
