Activation of the COOH-terminal Src kinase (Csk) by cAMP-dependent protein kinase inhibits signaling through the T cell receptor.
Activation of the COOH-terminal Src kinase (Csk) by cAMP-dependent protein kinase inhibits signaling through the T cell receptor.
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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。
DOI:
10.1084/jem.193.4.497
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发表时间:
2001-02-19
期刊:
影响因子:
--
通讯作者:
Taskén K
中科院分区:
文献类型:
--
作者:
Vang T;Torgersen KM;Sundvold V;Saxena M;Levy FO;Skålhegg BS;Hansson V;Mustelin T;Taskén K
In T cells, cAMP-dependent protein kinase (PKA) type I colocalizes with the T cell receptor–CD3 complex (TCR/CD3) and inhibits T cell function via a previously unknown proximal target. Here we examine the mechanism for this PKA-mediated immunomodulation. cAMP treatment of Jurkat and normal T cells reduces Lck-mediated tyrosine phosphorylation of the TCR/CD3 ζ chain after T cell activation, and decreases Lck activity. Phosphorylation of residue Y505 in Lck by COOH-terminal Src kinase (Csk), which negatively regulates Lck, is essential for the inhibitory effect of cAMP on ζ chain phosphorylation. PKA phosphorylates Csk at S364 in vitro and in vivo leading to a two- to fourfold increase in Csk activity that is necessary for cAMP-mediated inhibition of TCR-induced interleukin 2 secretion. Both PKA type I and Csk are targeted to lipid rafts where proximal T cell activation occurs, and phosphorylation of raft-associated Lck by Csk is increased in cells treated with forskolin. We propose a mechanism whereby PKA through activation of Csk intersects signaling by Src kinases and inhibits T cell activation.
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影响因子:
2.1
作者:
COUTURIER, MF;MARQUIS, DL;VOLMERANGE, Y
通讯作者:
VOLMERANGE, Y
影响因子:
64.8
作者:
CHOW, LML;FOURNEL, M;VEILLETTE, A
通讯作者:
VEILLETTE, A
影响因子:
2.9
作者:
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TAYLOR, SS
影响因子:
56.9
作者:
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通讯作者:
MCCORMICK, F
影响因子:
64.8
作者:
CLIPSTONE, NA;CRABTREE, GR
通讯作者:
CRABTREE, GR