A subdomain of the endoplasmic reticulum forms a cradle for autophagosome formation

Mitsuko Hayashi-Nishino; Naonobu Fujita; Takeshi Noda; Akihito Yamaguchi; Tamotsu Yoshimori; Akitsugu Yamamoto

doi:10.1038/ncb1991

A subdomain of the endoplasmic reticulum forms a cradle for autophagosome formation

Mitsuko Hayashi-Nishino, Naonobu Fujita, Takeshi Noda, Akihito Yamaguchi, Tamotsu Yoshimori, Akitsugu Yamamoto

Research output: Contribution to journal › Article › peer-review

699 Citations (Scopus)

Abstract

Autophagy is a bulk degradation process in eukaryotic cells and has fundamental roles in cellular homeostasis.The origin and source of autophagosomal membranes are long-standing questions in the field. Using electron microscopy, we show that, in mammalian culture cells, the endoplasmic reticulum (ER) associates with early autophagic structures called isolation membranes (IMs). Overexpression of an Atg4B mutant, which causes defects in autophagosome formation, induces the accumulation of ER-IM complexes. Electron tomography revealed that the ER-IM complex appears as a subdomain of the ER that formed a cradle encircling the IM, and showed that both ER and isolation membranes are interconnected.

Original language	English
Pages (from-to)	1433-1437
Number of pages	5
Journal	Nature cell biology
Volume	11
Issue number	12
DOIs	https://doi.org/10.1038/ncb1991
Publication status	Published - 2009 Dec 1

ASJC Scopus subject areas

Cell Biology

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AU - Yoshimori, Tamotsu

AU - Yamamoto, Akitsugu

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