Selective autophagy of the adaptor protein Bcl10 modulates T cell receptor activation of NF-κB.
Selective autophagy of the adaptor protein Bcl10 modulates T cell receptor activation of NF-κB.
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DOI:
10.1016/j.immuni.2012.04.008
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发表时间:
2012-06-29
期刊:
影响因子:
32.4
通讯作者:
Schaefer BC
中科院分区:
文献类型:
--
作者:
Paul S;Kashyap AK;Jia W;He YW;Schaefer BC
The adaptor protein Bcl10 is a critically important mediator of T cell receptor (TCR)-to-NF-κB signaling. Bcl10 degradation is a poorly understood biological phenomenon suggested to reduce TCR activation of NF-κB. Here we have shown that TCR engagement triggers the degradation of Bcl10 in primary effector T cells, but not in naïve T cells. TCR engagement promoted K63-polyubiquitination of Bcl10, causing Bcl10 association with the autophagy adaptor, p62. Paradoxically, p62 binding was required for both Bcl10 signaling to NF-κB and gradual degradation of Bcl10 by autophagy. Bcl10 autophagy was highly selective, as it spared Malt1, a direct Bcl10 binding partner. Blockade of Bcl10 autophagy enhanced TCR activation of NF-κB. Together, these data demonstrate that selective autophagy of Bcl10 is a pathway-intrinsic homeostatic mechanism that modulates TCR signaling to NF-κB in effector T cells. This homeostatic process may protect T cells from adverse consequences of unrestrained NF-κB activation, such as cellular senescence.
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