p110delta, a novel phosphatidylinositol 3-kinase catalytic subunit that associates with p85 and is expressed predominantly in leukocytes.

Article Details

Citation

Chantry D, Vojtek A, Kashishian A, Holtzman DA, Wood C, Gray PW, Cooper JA, Hoekstra MF

p110delta, a novel phosphatidylinositol 3-kinase catalytic subunit that associates with p85 and is expressed predominantly in leukocytes.

J Biol Chem. 1997 Aug 1;272(31):19236-41.

PubMed ID
9235916 [ View in PubMed
]
Abstract

We have identified a novel p110 isoform of phosphatidylinositol 3-kinase from human leukocytes that we have termed p110delta. In addition, we have independently isolated p110delta from a mouse embryo library on the basis of its ability to interact with Ha-RasV12 in the yeast two-hybrid system. This unique isoform contains all of the conserved structural features characteristic of the p110 family. Recombinant p110delta phosphorylates phosphatidylinositol and coimmunoprecipitates with p85. However, in contrast to previously described p110 subunits, p110delta is expressed in a tissue-restricted fashion; it is expressed at high levels in lymphocytes and lymphoid tissues and may therefore play a role in phosphatidylinositol 3-kinase-mediated signaling in the immune system.

DrugBank Data that Cites this Article

Polypeptides
NameUniProt ID
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoformO00329Details