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Intrinsically disordered region-mediated condensation of IFN-inducible SCOTIN/SHISA-5 inhibits ER-to-Golgi vesicle transport

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Authors

Kim, Nari; Kim, Tae-Hyeon; Kim, Chaelim; Lee, Jee-Eun; Kang, Myeong-Gyun; Shin, Sanghee; Jung, Minkyo; Kim, Jong-Seo; Mun, Ji Young; Rhee, Hyun-Woo; Park, Seung-Yeol; Shin, Yongdae; Yoo, Joo-Yeon

Issue Date
2023-10
Publisher
Cell Press
Citation
Developmental Cell, Vol.58 No.19, pp.1950-1966.e8
Abstract
Newly synthesized proteins in the endoplasmic reticulum (ER) are sorted by coat protein complex II (COPII) at the ER exit site en route to the Golgi. Under cellular stresses, COPII proteins become targets of regulation to control the transport. Here, we show that the COPII outer coat proteins Sec31 and Sec13 are selectively sequestered into the biomolecular condensate of SCOTIN/SHISA-5, which interferes with COPII vesicle formation and inhibits ER-to-Golgi transport. SCOTIN is an ER transmembrane protein with a cytosolic intrinsically disordered region (IDR), which is required and essential for the formation of condensates. Upon IFN-γ stimulation, which is a cellular condition that induces SCOTIN expression and condensation, ER-to-Golgi transport was inhibited in a SCOTIN-dependent manner. Furthermore, cancer-associated mutations of SCOTIN perturb its ability to form condensates and control transport. Together, we propose that SCOTIN impedes the ER-to-Golgi transport through its ability to form biomolecular condensates at the ER membrane.
ISSN
1534-5807
URI
https://hdl.handle.net/10371/201875
DOI
https://doi.org/10.1016/j.devcel.2023.08.030
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  • College of Natural Sciences
  • School of Biological Sciences
Research Area Molecular Interactomics, Proteomics, Systems Biology, 단백체학, 분자상호작용체학, 시스템생물학

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