Quantitative Interactomics of Lck-TurboID in Living Human T Cells Unveils T Cell Receptor Stimulation-Induced Proximal Lck Interactors.

Quantitative Interactomics of Lck-TurboID in Living Human T Cells Unveils T Cell Receptor Stimulation-Induced Proximal Lck Interactors.
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DOI:
10.1021/acs.jproteome.0c00616
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发表时间:
2021-01-01
影响因子:
4.4
通讯作者:
Salomon A
Salomon A
中科院分区:
生物学2区
文献类型:
--
作者:
Chua XY;Aballo T;Elnemer W;Tran M;Salomon A

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虽然Lck已被广泛认为在T细胞受体(TCR)信号传导途径的起始中起关键作用,但对TCR活化后T细胞中Lck的精确调节的理解仍然难以捉摸。研究蛋白质-蛋白质相互作用(PPI)使用邻近标记技术,如TurboID有可能提供有价值的分子洞察Lck调控网络。通过在Jurkat T细胞中表达Lck-TurboID,我们发现了TCR刺激30分钟后动态的短程Lck蛋白相互作用网络。在TurboID的这种新应用中,我们在活T细胞中检测到27种早期信号诱导的Lck近端相互作用物,包括已知和新型的Lck相互作用物,验证了这种工具的发现能力。我们的研究结果揭示了以前未被重视的Lck PPI,这可能与细胞骨架重排,TCR信号蛋白的泛素化,MAPK级联的激活,LAT信号体的聚结和免疫突触的形成有关。在这项研究中,我们首次在免疫细胞和激酶Lck中证明了TurboID可以用于在与早期TCR信号传导一致的时间尺度上揭示活细胞中的PPI动态。数据可通过ProteomeXchange获得,标识符为PXD 020759。
While Lck has been widely recognized to play a pivotal role in the initiation of the T cell receptor (TCR) signaling pathway, an understanding of the precise regulation of Lck in T cells upon TCR activation remains elusive. Investigation of protein-protein interaction (PPI) using proximity labeling techniques such as TurboID has the potential to provide valuable molecular insights into Lck regulatory networks. By expressing Lck-TurboID in Jurkat T cells, we have uncovered a dynamic, short-range Lck protein interaction network upon 30 minutes of TCR stimulation. In this novel application of TurboID, we detected 27 early signaling-induced Lck-proximal interactors in living T cells, including known and novel Lck interactors, validating the discovery power of this tool. Our results revealed previously unappreciated Lck PPI which may be associated with cytoskeletal rearrangement, ubiquitination of TCR signaling proteins, activation of the MAPK cascade, coalescence of the LAT signalosome, and formation of the immunological synapse. In this study, we demonstrated for the first time in immune cells and for the kinase Lck that TurboID can be utilized to unveil PPI dynamics in living cells at a time scale consistent with early TCR signaling. Data are available via ProteomeXchange with identifier PXD020759.
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