Dual roles of Atg8-PE deconjugation by Atg4 in autophagy.
Dual roles of Atg8-PE deconjugation by Atg4 in autophagy.
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作者:
Yu ZQ;Ni T;Hong B;Wang HY;Jiang FJ;Zou S;Chen Y;Zheng XL;Klionsky DJ;Liang Y;Xie Z
Modification of target molecules by ubiquitin or ubiquitin-like (Ubl) proteins is generally reversible. Little is known, however, about the physiological function of the reverse reaction, deconjugation. Atg8 is a unique Ubl protein whose conjugation target is the lipid phosphatidylethanolamine (PE). Atg8 functions in the formation of double-membrane autophagosomes, a central step in the well-conserved intracellular degradation pathway of macroautophagy (hereafter autophagy). Here we show that the deconjugation of Atg8−PE by the cysteine protease Atg4 plays dual roles in the formation of autophagosomes. During the early stage of autophagosome formation, deconjugation releases Atg8 from non-autophagosomal membranes to maintain a proper supply of Atg8. At a later stage, the release of Atg8 from intermediate autophagosomal membranes facilitates the maturation of these structures into fusion-capable autophagosomes. These results provide new insights into the functions of Atg8−PE and its deconjugation.
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影响因子:
64.8
作者:
Ichimura, Y;Kirisako, T;Ohsumi, Y
通讯作者:
Ohsumi, Y
DOI:
10.1006/bbrc.1995.1636
发表时间:
1995-05-05
影响因子:
3.1
作者:
NODA, T;MATSUURA, A;OHSUMI, Y
通讯作者:
OHSUMI, Y
影响因子:
11.8
作者:
Shintani, T;Huang, WP;Klionsky, DJ
通讯作者:
Klionsky, DJ
影响因子:
64.5
作者:
Nakatogawa, Hitoshi;Ichimura, Yoshinobu;Ohsumi, Yoshinori
通讯作者:
Ohsumi, Yoshinori
影响因子:
7.8
作者:
Bjorkoy, Geir;Lamark, Trond;Brech, Andreas;Outzen, Heidi;Perander, Maria;Overvatn, Aud;Stenmark, Harald;Johansen, Terje
通讯作者:
Johansen, Terje