Sec16 alternative splicing dynamically controls COPII transport efficiency
Sec16 alternative splicing dynamically controls COPII transport efficiency
复制标题
Sec16选择性拼接动态控制COPII传输效率
DOI:
10.1038/ncomms12347
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发表时间:
2016
影响因子:
16.6
通讯作者:
Heyd F
中科院分区:
文献类型:
--
作者:
Wilhelmi I;Kanski R;Neumann A;Herdt O;Hoff F;Jacob R;Preussner M;Heyd F
The transport of secretory proteins from the endoplasmic reticulum (ER) to the Golgi depends on COPII-coated vesicles. While the basic principles of the COPII machinery have been identified, it remains largely unknown how COPII transport is regulated to accommodate tissue- or activation-specific differences in cargo load and identity. Here we show that activation-induced alternative splicing ofSec16controls adaptation of COPII transport to increased secretory cargo upon T-cell activation. Using splice-site blocking morpholinos and CRISPR/Cas9-mediated genome engineering, we show that the number of ER exit sites, COPII dynamics and transport efficiency depend onSec16alternative splicing. As the mechanistic basis, we suggest the C-terminal Sec16 domain to be a splicing-controlled protein interaction platform, with individual isoforms showing differential abilities to recruit COPII components. Our work connects the COPII pathway with alternative splicing, adding a new regulatory layer to protein secretion and its adaptation to changing cellular environments.
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