論文

国際誌
2023年3月

STING signalling is terminated through ESCRT-dependent microautophagy of vesicles originating from recycling endosomes.

Nature cell biology
  • Yoshihiko Kuchitsu
  • Kojiro Mukai
  • Rei Uematsu
  • Yuki Takaada
  • Ayumi Shinojima
  • Ruri Shindo
  • Tsumugi Shoji
  • Shiori Hamano
  • Emari Ogawa
  • Ryota Sato
  • Kensuke Miyake
  • Akihisa Kato
  • Yasushi Kawaguchi
  • Masahiko Nishitani-Isa
  • Kazushi Izawa
  • Ryuta Nishikomori
  • Takahiro Yasumi
  • Takehiro Suzuki
  • Naoshi Dohmae
  • Takefumi Uemura
  • Glen N Barber
  • Hiroyuki Arai
  • Satoshi Waguri
  • Tomohiko Taguchi
  • 全て表示

25
3
開始ページ
453
終了ページ
466
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41556-023-01098-9

Stimulator of interferon genes (STING) is essential for the type I interferon response against a variety of DNA pathogens. Upon emergence of cytosolic DNA, STING translocates from the endoplasmic reticulum to the Golgi where STING activates the downstream kinase TBK1, then to lysosome through recycling endosomes (REs) for its degradation. Although the molecular machinery of STING activation is extensively studied and defined, the one underlying STING degradation and inactivation has not yet been fully elucidated. Here we show that STING is degraded by the endosomal sorting complexes required for transport (ESCRT)-driven microautophagy. Airyscan super-resolution microscopy and correlative light/electron microscopy suggest that STING-positive vesicles of an RE origin are directly encapsulated into Lamp1-positive compartments. Screening of mammalian Vps genes, the yeast homologues of which regulate Golgi-to-vacuole transport, shows that ESCRT proteins are essential for the STING encapsulation into Lamp1-positive compartments. Knockdown of Tsg101 and Vps4, components of ESCRT, results in the accumulation of STING vesicles in the cytosol, leading to the sustained type I interferon response. Knockdown of Tsg101 in human primary T cells leads to an increase the expression of interferon-stimulated genes. STING undergoes K63-linked ubiquitination at lysine 288 during its transit through the Golgi/REs, and this ubiquitination is required for STING degradation. Our results reveal a molecular mechanism that prevents hyperactivation of innate immune signalling, which operates at REs.

リンク情報
DOI
https://doi.org/10.1038/s41556-023-01098-9
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/36918692
PubMed Central
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10014584
ID情報
  • DOI : 10.1038/s41556-023-01098-9
  • PubMed ID : 36918692
  • PubMed Central 記事ID : PMC10014584

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