Tango1 spatially organizes ER exit sites to control ER export.

Tango1 spatially organizes ER exit sites to control ER export.
复制标题

Tango1 在空间上组织 ER 出口站点来控制 ER 出口。

DOI:
10.1083/jcb.201611088
复制
发表时间:
2017-04-03
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Pastor-Pareja JC
Pastor-Pareja JC
中科院分区:
其他
文献类型:
--
作者:
Liu M;Feng Z;Ke H;Liu Y;Sun T;Dai J;Cui W;Pastor-Pareja JC

文献摘要

被引文献

相似文献

果蝇 Tango1 是分泌 IV 型胶原蛋白所必需的。刘等人。使用遗传分析表明,Tango1 需要在空间上维持 ER 出口位点(高尔基体)的大小和完整性,并且 Tango1 功能的丧失不仅会损害 IV 型胶原蛋白的分泌,还会损害一般分泌。分泌物从内质网 (ER) 的排出发生在称为 ER 排出位点 (ERES) 的特殊区域。在哺乳动物中,TANGO1 和其他 MIA/cTAGE(黑色素瘤抑制活性/皮肤 T 细胞淋巴瘤相关抗原)家族蛋白的缺失会阻止胶原蛋白等大分子物质从内质网排出。在这里,我们证明果蝇 Tango1(果蝇中唯一的 MIA/cTAGE 家族成员)是 ERES-高尔基体界面的关键组织者。 Tango1 环将 COPII(外壳蛋白 II)载体和高尔基体紧密地固定在其中心。所有组织中 ERES 中存在的 Tango1 缺失会减小 ERES 大小并导致 ERES-高尔基体解偶联,这不仅会损害胶原蛋白的分泌,还会损害我们检查的所有其他货物的分泌。进一步支持 Tango1 的组织作用,其过度表达会产生更多、更大的 ERES。我们的结果表明,ERES、载体和高尔基体元件通过 Tango1 的多重相互作用进行空间协调,增加了果蝇的分泌能力,并允许分泌大量物质。
Drosophila melanogaster Tango1 is required for secretion of Collagen IV. Liu et al. use a genetic analysis to show that Tango1 is required to spatially maintain the size and integrity of ER exit site–Golgi units and that loss of Tango1 function impairs not only Collagen IV secretion but also general secretion. Exit of secretory cargo from the endoplasmic reticulum (ER) takes place at specialized domains called ER exit sites (ERESs). In mammals, loss of TANGO1 and other MIA/cTAGE (melanoma inhibitory activity/cutaneous T cell lymphoma–associated antigen) family proteins prevents ER exit of large cargoes such as collagen. Here, we show that Drosophila melanogaster Tango1, the only MIA/cTAGE family member in fruit flies, is a critical organizer of the ERES–Golgi interface. Tango1 rings hold COPII (coat protein II) carriers and Golgi in close proximity at their center. Loss of Tango1, present at ERESs in all tissues, reduces ERES size and causes ERES–Golgi uncoupling, which impairs secretion of not only collagen, but also all other cargoes we examined. Further supporting an organizing role of Tango1, its overexpression creates more and larger ERESs. Our results suggest that spatial coordination of ERES, carrier, and Golgi elements through Tango1’s multiple interactions increases secretory capacity in Drosophila and allows secretion of large cargo.