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NTRK2 Q16620

BDNF/NT-3生长因子受体 (EC 2.7.10.1) (GP145-TrkB) (Trk-B) (神经营养酪氨酸激酶受体2型) (TrkB酪氨酸激酶) (原肌球蛋白相关激酶B)

蛋白质信息 (UniProt)

BDNF/NT-3生长因子受体 (EC 2.7.10.1) (GP145-TrkB) (Trk-B) (神经营养酪氨酸激酶受体2型) (TrkB酪氨酸激酶) (原肌球蛋白相关激酶B)

Q16620

功能描述

受体酪氨酸激酶,通过调节神经元存活、增殖、迁移、分化和突触形成及可塑性,参与中枢和外周神经系统的发育和成熟 (By similarity)。BDNF/脑源性神经营养因子和NTF4/神经营养因子-4的受体。也可以结合NTF3/神经营养因子-3,但其激活受体的效率较低,而是通过NTRK2调节神经元存活 (PubMed:15494731, PubMed:7574684)。配体结合后,发生同源二聚化、自磷酸化和激活 (PubMed:15494731)。募集、磷酸化和/或激活包括SHC1、FRS2、SH2B1、SH2B2和PLCG1在内的多种下游效应因子,这些因子调节不同的重叠信号级联反应。通过SHC1、FRS2、SH2B1、SH2B2激活GRB2-Ras-MAPK级联反应,例如调节包括神经突生长在内的神经元分化。通过相同的效应因子控制主要调节生长和存活的Ras-PI3激酶-AKT1信号级联反应。通过PLCG1和下游蛋白激酶C调节的通路控制突触可塑性。因此,通过调节短期突触功能和长时程增强,在学习和记忆中发挥作用。PLCG1还导致NF-Kappa-B激活和涉及细胞存活的基因转录。因此,它能够抑制失巢凋亡,即由细胞-基质相互作用丧失引起的凋亡。也可能在胶质细胞中参与神经营养因子依赖的钙信号传导,并介导神经元和胶质细胞之间的通讯。 {ECO:0000250|UniProtKB:P15209, ECO:0000269|PubMed:15494731, ECO:0000269|PubMed:7574684}。

组织特异性

Isoform TrkB is expressed in the central and peripheral nervous system. In the central nervous system (CNS), expression is observed in the cerebral cortex, hippocampus, thalamus, choroid plexus, granular layer of the cerebellum, brain stem, and spinal cord. In the peripheral nervous system, it is expressed in many cranial ganglia, the ophthalmic nerve, the vestibular system, multiple facial structures, the submaxillary glands, and dorsal root ganglia. Isoform TrkB-T1 is mainly expressed in the brain but also detected in other tissues including pancreas, kidney and heart. Isoform TrkB-T-Shc is predominantly expressed in the brain.

亚细胞定位

Cell membrane

关键词

3D-structure Alternative splicing ATP-binding Cell membrane Cell projection Cytoplasm Developmental protein Differentiation Disease variant Disulfide bond