In vitro membrane reconstitution of the T-cell receptor proximal signaling network.

In vitro membrane reconstitution of the T-cell receptor proximal signaling network.
复制标题

DOI:
10.1038/nsmb.2762
复制
发表时间:
2014-02
影响因子:
16.8
通讯作者:
Vale RD
Vale RD
中科院分区:
生物学1区
文献类型:
--
作者:
Hui E;Vale RD

文献摘要

参考文献

被引文献

相似文献

T细胞受体(TCR)磷酸化受复杂网络控制,所述复杂网络包括Lck、Src家族激酶(SFK)、酪氨酸磷酸酶CD 45和Lck抑制性激酶Csk。这些竞争性磷酸化和去磷酸化反应如何被调节以产生T细胞触发还不完全清楚。在这里,我们使用脂质体上的纯化酶重建了这个信号网络,重现了它们通常相互作用的膜环境。我们证明,LCK的酶活性可以通过控制其磷酸化状态调节超过10倍的范围。通过改变激酶和磷酸酶的浓度,我们构建了相图,揭示了从静止状态到磷酸化状态的过渡中的超灵敏度,并证明了共聚集TCR-Lck或从膜上分离Csk可以触发TCR磷酸化。我们的研究结果提供了深入了解TCR信号转导机制以及其他涉及SFKs的信号通路。
T-cell receptor (TCR) phosphorylation is controlled by a complex network that includes Lck, a Src family kinase (SFK), the tyrosine phosphatase CD45, and the Lck-inhibitory kinase Csk. How these competing phosphorylation and dephosphorylation reactions are modulated to produce T-cell triggering is not fully understood. Here we reconstituted this signaling network using purified enzymes on liposomes, recapitulating the membrane environment in which they normally interact. We demonstrate that Lck's enzymatic activity can be regulated over a ~10-fold range by controlling its phosphorylation state. By varying kinase and phosphatase concentrations, we constructed phase diagrams that reveal ultrasensitivity in the transition from the quiescent to the phosphorylated state and demonstrate that coclustering TCR-Lck or detaching Csk from the membrane can trigger TCR phosphorylation. Our results provide insight into the mechanism of TCR signaling as well as other signaling pathways involving SFKs.
DOI: 10.1016/0092-8674(87)90758-6
发表时间: 1987-04-10
期刊: CELL
影响因子: 64.5
作者:
CARTWRIGHT, CA;ECKHART, W;KAPLAN, PL
通讯作者: KAPLAN, PL
DOI: 10.1016/0092-8674(93)90641-3
发表时间: 1993-06-18
期刊: CELL
影响因子: 64.5
作者:
IMAMOTO, A;SORIANO, P
通讯作者: SORIANO, P
DOI: 10.1073/pnas.0511136103
发表时间: 2006-02-21
影响因子: 11.1
作者:
Brügger, B;Glass, B;Kräusslich, HG
通讯作者: Kräusslich, HG
DOI: 10.1038/nature11220
发表时间: 2012-07-05
期刊: NATURE
影响因子: 64.8
作者:
James, John R.;Vale, Ronald D.
通讯作者: Vale, Ronald D.
DOI: 10.1074/jbc.m803355200
发表时间: 2008-11-14
期刊: The Journal of biological chemistry
影响因子: --
作者:
Gaffaney JD;Dunning FM;Wang Z;Hui E;Chapman ER
通讯作者: Chapman ER