LYP inhibits T-cell activation when dissociated from CSK.

LYP inhibits T-cell activation when dissociated from CSK.
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DOI:
10.1038/nchembio.916
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发表时间:
2012-03-18
影响因子:
14.8
通讯作者:
Tautz, Lutz
Tautz, Lutz
中科院分区:
生物学1区
文献类型:
--
作者:
Vang, Torkel;Liu, Wallace H.;Delacroix, Laurence;Wu, Shuangding;Vasile, Stefan;Dahl, Russell;Yang, Li;Musumeci, Lucia;Francis, Dana;Landskron, Johannes;Tasken, Kjetil;Tremblay, Michel L.;Lie, Benedicte A.;Page, Rebecca;Mustelin, Tomas;Rahmouni, Souad;Rickert, Robert C.;Tautz, Lutz

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类磷脂酪氨酸磷酸酶(LYP)和C-末端Src激酶(CSK)是通过T细胞抗原受体(TCR)介导的信号传导的负调节剂,并且被认为在形成复合物时以协同方式起作用。在这里,我们研究了LYP/CSK复合物在T细胞中的时空动力学。我们证明,这种复合物的解离是必要的招聘LYP的质膜,在那里它下调TCR信号。LYP的有效和选择性化学探针的开发证实,当从CSK中去除LYP时,LYP抑制T细胞活化。我们的研究结果可以解释与单核苷酸多态性相关的TCR介导的信号传导减少,这增加了某些自身免疫性疾病的风险,包括1型糖尿病和类风湿性关节炎,并导致LYP等位基因的表达,无法结合CSK。我们的化合物也代表了开发基于LYP的自身免疫治疗的起点。
Lymphoid tyrosine phosphatase (LYP) and C-terminal Src kinase (CSK) are negative regulators of signaling mediated through the T cell antigen receptor (TCR) and are thought to act in a cooperative manner when forming a complex. Here, we studied the spatio-temporal dynamics of the LYP/CSK complex in T cells. We demonstrate that dissociation of this complex is necessary for recruitment of LYP to the plasma membrane, where it down-modulates TCR signaling. Development of a potent and selective chemical probe of LYP confirmed that LYP inhibits T cell activation when removed from CSK. Our findings may explain the reduced TCR-mediated signaling associated with a single nucleotide polymorphism, which confers increased risk for certain autoimmune diseases, including type 1 diabetes and rheumatoid arthritis, and results in expression of a LYP allele that is unable to bind CSK. Our compound also represents a starting point for the development of a LYP-based treatment of autoimmunity.
cAMP 依赖性蛋白激酶激活 COOH 末端 Src 激酶 (Csk),抑制通过 T 细胞受体的信号传导。
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