Protein kinase involved in the transduction of mitogenic signals from the cell membrane to the nucleus (Probable). Phosphorylates MAP2K1, and thereby activates the MAP kinase signal transduction pathway (PubMed:21441910, PubMed:29433126). May play a role in the postsynaptic responses of hippocampal neurons (PubMed:1508179). ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Binds 2 Zn(2+) ions per subunit. In quiescent cells, maintained in an inactive state via an intramolecular interaction between the protein kinase and N-terminal domains. Following mitogen-mediated cell activation, binds via its RGB domain to active HRAS (GTP-bound) which releases the inhibitory intramolecular interaction between the two domains. This allows the MAP2K1-mediated dimerization of KSR1 or KSR2, and BRAF which activates BRAF. Monomer. Homodimer. Heterodimerizes with RAF1, and the heterodimer possesses a highly increased kinase activity compared to the respective homodimers or monomers. Heterodimerization is mitogen-regulated and enhanced by 14-3-3 proteins. MAPK1/ERK2 activation can induce a negative feedback that promotes the dissociation of the heterodimer by phosphorylating BRAF at Thr-753. Heterodimerizes (via N-terminus) with KSR1 (via N-terminus) or KSR2 (via N-terminus) in a MAP2K1-dependent manner (PubMed:29433126). Interacts with MAP2K1 and MAP2K2 (PubMed:29433126). Found in a complex with at least BRAF, HRAS, MAP2K1, MAPK3 and RGS14. Interacts with RIT1. Interacts (via N-terminus) with RGS14 (via RBD domains); the interaction mediates the formation of a ternary complex with RAF1, a ternary complex inhibited by GNAI1 (By similarity). Interacts with DGKH (PubMed:19710016). Interacts with PRMT5 (PubMed:21917714). Interacts with KSR2 (PubMed:21441910). Interacts with AKAP13, MAP2K1 and KSR1. Identified in a complex with AKAP13, MAP2K1 and KSR1 (PubMed:21102438). Interacts with FNIP1 and FNIP2 (PubMed:27353360). Colocalizes with RGS14 and RAF1 in both the cytoplasm and membranes. Brain and testis. Phosphorylation at Ser-365 by SGK1 inhibits its activity. Methylation at Arg-671 decreases stability and kinase activity. Ubiquitinated by RNF149; which leads to proteasomal degradation. Polyubiquitinated at Lys-578 in response to EGF. Defects in BRAF are found in a wide range of cancers. The disease may be caused by variants affecting the gene represented in this entry. The gene represented in this entry is involved in disease pathogenesis. The gene represented in this entry is involved in disease pathogenesis. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry. A chromosomal aberration involving BRAF is found in pilocytic astrocytomas. A tandem duplication of 2 Mb at 7q34 leads to the expression of a KIAA1549-BRAF fusion protein with a constitutive kinase activity and inducing cell transformation. Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. RAF subfamily. Extended N-terminus. Extended N-terminus. Extended N-terminus. Extended N-terminus. Extended N-terminus. Extended N-terminus.