IndraLab

Statements


Phosphorylated BRAF is inactive. 3 / 3
3 |

"Erk-induced phosphorylation of b-raf on t753 promoted the disassembly of raf heterodimers, and the mutation of t753 prolonged growth factor-induced heterodimerization. The b-raf t753a mutant enhanced differentiation of pc12 cells, which was previously shown to be dependent on sustained erk signaling. Site is critical for v-src dependent modulation of slk kinase activity."

"To address whether PP1α activates B-Raf through these inhibitory sites, we made use of B-Raf protein mutants in which an individual inhibitory site, as well as all four sites (4A), were mutated to alanine.|We confirmed that GST-B-Raf was phosphorylated by ERK2 in vitro  xref  , mainly on S151 and T753 (Fig.  xref ), and found that PP1α dephosphorylated B-Raf on both ERK phosphorylation sites (Fig.  xref )."

"Serum- and glucocorticoid-inducible kinase SGK phosphorylates and negatively regulates B-Raf.|We observed that SGK inhibits B-Raf activity."