Cargo receptor Surf4 regulates endoplasmic reticulum export of proinsulin in pancreatic β-cells.
Cargo receptor Surf4 regulates endoplasmic reticulum export of proinsulin in pancreatic β-cells.
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货物受体表面4调节胰腺β细胞中蛋白的内质网。
DOI:
10.1038/s42003-022-03417-6
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发表时间:
2022-05-13
影响因子:
5.9
通讯作者:
Sato, Ken
中科院分区:
文献类型:
--
作者:
Saegusa, Keiko;Matsunaga, Kohichi;Maeda, Miharu;Saito, Kota;Izumi, Tetsuro;Sato, Ken
Insulin is an essential peptide hormone that maintains blood glucose levels. Although the mechanisms underlying insulin exocytosis have been investigated, the mechanism of proinsulin export from the endoplasmic reticulum (ER) remains unclear. Here, we demonstrated that Surf4, a cargo receptor homolog, regulates the ER export of proinsulin via its recruitment to ER exit sites (ERES). Under high-glucose conditions, Surf4 expression was upregulated, and Surf4 proteins mainly localized to the ER at a steady state and accumulated in the ERES, along with proinsulin in rat insulinoma INS-1 cells. Surf4-knockdown resulted in proinsulin retention in the ER and decreased the levels of mature insulin in secretory granules, thereby significantly reducing insulin secretion. Surf4 forms an oligomer and can physically interact with proinsulin and Sec12, essential for COPII vesicle formation. Our findings suggest that Surf4 interacts with proinsulin and delivers it into COPII vesicles for ER export in co-operation with Sec12 and COPII. Surf4 is an ER cargo receptor for proinsulin, facilitating proinsulin export out of the ERES in a cellular model of pancreatic β-cells, with its expression dependent on glucose concentration and Surf4 knockdown impairing insulin secretion.
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DOI:
10.1002/bies.201800004
发表时间:
2018-07
期刊:
BioEssays : news and reviews in molecular, cellular and developmental biology
影响因子:
--
作者:
Hanna MG;Peotter JL;Frankel EB;Audhya A
通讯作者:
Audhya A
影响因子:
3.7
作者:
Hou N;Mogami H;Kubota-Murata C;Sun M;Takeuchi T;Torii S
通讯作者:
Torii S
DOI:
10.1083/jcb.201705027
发表时间:
2017-12-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Fan J;Wang Y;Liu L;Zhang H;Zhang F;Shi L;Yu M;Gao F;Xu Z
通讯作者:
Xu Z
影响因子:
4.6
作者:
Yamasaki A;Hara T;Maejima I;Sato M;Sato K;Sato K
通讯作者:
Sato K
影响因子:
6.8
作者:
Dodson, G;Steiner, D
通讯作者:
Steiner, D