更新于:2025-05-07

SH2B1

基本信息

别名
FLJ30542、KIAA1299、Pro-rich, PH and SH2 domain-containing signaling mediator
+ [6]
简介
Adapter protein for several members of the tyrosine kinase receptor family. Involved in multiple signaling pathways mediated by Janus kinase (JAK) and receptor tyrosine kinases, including the receptors of insulin (INS), insulin-like growth factor 1 (IGF1), nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF), platelet-derived growth factor (PDGF) and fibroblast growth factors (FGFs). In growth hormone (GH) signaling, autophosphorylated ('Tyr-813') JAK2 recruits SH2B1, which in turn is phosphorylated by JAK2 on tyrosine residues. These phosphotyrosines form potential binding sites for other signaling proteins. GH also promotes serine/threonine phosphorylation of SH2B1 and these phosphorylated residues may serve to recruit other proteins to the GHR-JAK2-SH2B1 complexes, such as RAC1. In leptin (LEP) signaling, binds to and potentiates the activation of JAK2 by globally enhancing downstream pathways. In response to leptin, binds simultaneously to both, JAK2 and IRS1 or IRS2, thus mediating formation of a complex of JAK2, SH2B1 and IRS1 or IRS2. Mediates tyrosine phosphorylation of IRS1 and IRS2, resulting in activation of the PI 3-kinase pathway. Acts as a positive regulator of NGF-mediated activation of the Akt/Forkhead pathway; prolongs NGF-induced phosphorylation of AKT1 on 'Ser-473' and AKT1 enzymatic activity. Enhances the kinase activity of the cytokine receptor-associated tyrosine kinase JAK2 and of other receptor tyrosine kinases, such as FGFR3 and NTRK1. For JAK2, the mechanism seems to involve dimerization of both, SH2B1 and JAK2. Enhances RET phosphorylation and kinase activity. Isoforms seem to be differentially involved in IGF1 and PDGF-induced mitogenesis (By similarity).

分析

对领域进行一次全面的分析。
对领域进行一次全面的分析。
Eureka LS:
全新生物医药AI Agent 覆盖科研全链路,让突破性发现快人一步
立即开始免费试用!
智慧芽新药情报库是智慧芽专为生命科学人士构建的基于AI的创新药情报平台,助您全方位提升您的研发与决策效率。
立即开始数据试用!
智慧芽新药库数据也通过智慧芽数据服务平台,以API或者数据包形式对外开放,助您更加充分利用智慧芽新药情报信息。
生物序列数据库
生物药研发创新
免费使用
化学结构数据库
小分子化药研发创新
免费使用