Cloned (Comment) | Organism |
---|---|
expression of HA-tagged p85alpha in NIH 3T3 cells in a mouse cell model | Homo sapiens |
Protein Variants | Comment | Organism |
---|---|---|
additional information | sequencing of cancer cell p85alpha subunits reveal four mutational alterations, three colonic and one ovarian: one with an early stop codon after Asp605 and three containing small in-frame deletions, DELTALeu570-Gln572, DELTALeu570-Asp578, and DELTAMet582-Asp605. These deletions are located near the negative regulatory phosphorylation site Ser608 within p85alpha. All mutations lead to increased enzyme activity | Homo sapiens |
R274A | the GTPase-activating protein activity toward Rab5 and Rab4 of PI3K p85alpha subunit is abolished in the mutant. Expression of p85alpha-R274A results in increased platelet-derived growth factor receptor, PDGFR, activation and downstream signaling, via Akt and MAPK pathways, and in decreased PDGFR degradation. Disrupted RabGAP function of the p85 subunit of phosphatidylinositol 3-kinase results in cell transformation, co-expression of a dominant negative Rab5-S34N mutant attenuates these transformed properties | Homo sapiens |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | Homo sapiens | the p85alpha subunit of phosphatidylinositol 3-kinase has GTPase-activating protein activity toward Rab5 and Rab4, small monomeric GTPases important in the regulation of RTK endocytosis, trafficking, and degradation pathways | ? | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Homo sapiens | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | the p85alpha subunit of phosphatidylinositol 3-kinase has GTPase-activating protein activity toward Rab5 and Rab4, small monomeric GTPases important in the regulation of RTK endocytosis, trafficking, and degradation pathways | Homo sapiens | ? | - |
? |
Synonyms | Comment | Organism |
---|---|---|
PI3K | - |
Homo sapiens |