Unc119, a novel activator of Lck/Fyn, is essential for T cell activation.

Unc119, a novel activator of Lck/Fyn, is essential for T cell activation.
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DOI:
10.1084/jem.20030589
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发表时间:
2004-02-02
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Alam R
Alam R
中科院分区:
其他
文献类型:
--
作者:
Gorska MM;Stafford SJ;Cen O;Sur S;Alam R

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T细胞抗原受体(TCR)信号传导的第一步是受体结合的Src激酶Lck和Fyn的活化。这一过程的确切机制尚不清楚。在这里,我们报告了新的Src同源(SH)3/SH 2配体-非配位119(Unc 119)与CD 3和CD 4相关,并激活Lck和Fyn。Unc 119过表达增加T细胞中Lck/Fyn活性。在Unc 119缺陷型T细胞中,Lck/Fyn活性显著降低,伴随着白细胞介素2产生和细胞增殖的减少。用Unc 119重建细胞会逆转信号传导和功能结果。因此,Unc 119是Src型激酶的受体相关激活剂。它提供了TCR复合物中信号产生的新机制。
The first step in T cell receptor for antigen (TCR) signaling is the activation of the receptor-bound Src kinases, Lck and Fyn. The exact mechanism of this process is unknown. Here, we report that the novel Src homology (SH) 3/SH2 ligand–Uncoordinated 119 (Unc119) associates with CD3 and CD4, and activates Lck and Fyn. Unc119 overexpression increases Lck/Fyn activity in T cells. In Unc119-deficient T cells, Lck/Fyn activity is dramatically reduced with concomitant decrease in interleukin 2 production and cellular proliferation. Reconstitution of cells with Unc119 reverses the signaling and functional outcome. Thus, Unc119 is a receptor-associated activator of Src-type kinases. It provides a novel mechanism of signal generation in the TCR complex.
DOI: 10.1084/jem.190.3.375
发表时间: 1999-08-02
期刊: The Journal of experimental medicine
影响因子: --
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