In vitro membrane reconstitution of the T-cell receptor proximal signaling network.
In vitro membrane reconstitution of the T-cell receptor proximal signaling network.
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DOI:
10.1038/nsmb.2762
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发表时间:
2014-02
影响因子:
16.8
通讯作者:
Vale RD
中科院分区:
文献类型:
--
作者:
Hui E;Vale RD
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.
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影响因子:
64.5
作者:
CARTWRIGHT, CA;ECKHART, W;KAPLAN, PL
通讯作者:
KAPLAN, PL
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
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