Recombinant human TrkB protein

Specifications

Form

Liquid

Additional notes

Affinity purified.

General info

Function

The protein expressed by the NTRK2 gene functions as a receptor for BDNF/brain-derived neurotrophic factor and NTF4/neurotrophin-4, and can also bind to NTF3/neurotrophin-3, although this interaction is less efficient. Upon binding with its ligands, the receptor undergoes homodimerization, autophosphorylation, and activation, enabling it to recruit, phosphorylate, and/or activate several downstream effectors like SHC1, FRS2, SH2B1, SH2B2, and PLCG1. These effectors regulate distinct but overlapping signaling cascades. Through SHC1, FRS2, SH2B1, and SH2B2, NTRK2 activates the GRB2-Ras-MAPK cascade, which regulates neuronal differentiation including neurite outgrowth, as well as the Ras-PI3 kinase-AKT1 signaling cascade, which is primarily involved in growth and survival. The PLCG1 pathway, which influences synaptic plasticity, plays a role in learning and memory by affecting both short-term synaptic function and long-term potentiation. Additionally, PLCG1 activation leads to NF-Kappa-B activation, promoting the transcription of genes related to cell survival, thereby suppressing anoikis. NTRK2 may also be involved in neurotrophin-dependent calcium signaling in glial cells and in mediating communication between neurons and glial cells. This supplementary information is collated from multiple sources and compiled automatically.

Sequence similarities

Belongs to the protein kinase superfamily. Tyr protein kinase family. Insulin receptor subfamily.

Post-translational modifications

Phosphorylated. Undergoes ligand-mediated autophosphorylation that is required for interaction with SHC1 and PLCG1 and other downstream effectors. Isoform TrkB-T-Shc is not phosphorylated.. Ubiquitinated. Undergoes polyubiquitination upon activation; regulated by NGFR. Ubiquitination regulates the internalization of the receptor (By similarity).

Subcellular localisation

Endosome membrane