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AliasesPIK3C2B, C2-PI3K, phosphatidylinositol-4-phosphate 3-kinase catalytic subunit type 2 beta
External IDsMGI: 2685045 HomoloGene: 20582 GeneCards: PIK3C2B
Gene location (Human)
Chromosome 1 (human)
Chr.Chromosome 1 (human)[1]
Chromosome 1 (human)
Genomic location for PIK3C2B
Genomic location for PIK3C2B
Band1q32.1Start204,422,628 bp[1]
End204,494,724 bp[1]
RNA expression pattern
PBB GE PIK3C2B 204484 at fs.png
More reference expression data
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC)Chr 1: 204.42 – 204.49 MbChr 1: 133.05 – 133.11 Mb
PubMed search[3][4]
View/Edit HumanView/Edit Mouse

Phosphatidylinositol-4-phosphate 3-kinase C2 domain-containing beta polypeptide is an enzyme that in humans is encoded by the PIK3C2B gene.[5][6][7]


The protein encoded by this gene belongs to the phosphoinositide 3-kinase (PI3K) family. PI3-kinases play roles in signaling pathways involved in cell proliferation, oncogenic transformation, cell survival, cell migration, and intracellular protein trafficking. This protein contains a lipid kinase catalytic domain as well as a C-terminal C2 domain, a characteristic of class II PI3-kinases. C2 domains act as calcium-dependent phospholipid binding motifs that mediate translocation of proteins to membranes, and may also mediate protein-protein interactions. The PI3-kinase activity of this protein is sensitive to low nanomolar levels of the inhibitor wortmannin. The C2 domain of this protein was shown to bind phospholipids but not Ca2+, which suggests that this enzyme may function in a calcium-independent manner.[7]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000133056 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000026447 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:".
  4. ^ "Mouse PubMed Reference:".
  5. ^ Brown RA, Ho LK, Weber-Hall SJ, Shipley JM, Fry MJ (Apr 1997). "Identification and cDNA cloning of a novel mammalian C2 domain-containing phosphoinositide 3-kinase, HsC2-PI3K". Biochemical and Biophysical Research Communications. 233 (2): 537–44. doi:10.1006/bbrc.1997.6495. PMID 9144573.
  6. ^ Arcaro A, Volinia S, Zvelebil MJ, Stein R, Watton SJ, Layton MJ, Gout I, Ahmadi K, Downward J, Waterfield MD (Dec 1998). "Human phosphoinositide 3-kinase C2beta, the role of calcium and the C2 domain in enzyme activity". The Journal of Biological Chemistry. 273 (49): 33082–90. doi:10.1074/jbc.273.49.33082. PMID 9830063.
  7. ^ a b "Entrez Gene: PIK3C2B phosphoinositide-3-kinase, class 2, beta polypeptide".

Further reading[edit]