該基因編碼的蛋白屬于磷酸肌醇3激酶（pi3k）家族。pi3激酶在參與細胞增殖、癌基因轉化、細胞存活、細胞遷移和細胞內蛋白質轉運的信號傳導途徑中發揮作用。該蛋白包含一個脂質激酶催化結構域和一個C末端C2結構域，這是II類PI3激酶的特征。C2結構域作為鈣依賴性磷脂結合基序，介導蛋白質向膜的轉運，也可能介導蛋白質-蛋白質的相互作用。該蛋白的pi3激酶活性對抑制劑wortmanin的低納摩爾水平敏感。該蛋白的c2結構域與磷脂結合，而不是與ca2+結合，這表明該酶的功能可能與鈣無關。[由RefSeq提供，2008年7月]
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 wortmanin. 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. [provided by RefSeq, Jul 2008]