The Legionella effector RavZ inhibits host autophagy through irreversible Atg8 deconjugation.

The Legionella effector RavZ inhibits host autophagy through irreversible Atg8 deconjugation.
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DOI:
10.1126/science.1227026
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发表时间:
2012-11-23
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Roy CR
Roy CR
中科院分区:
其他
文献类型:
--
作者:
Choy A;Dancourt J;Mugo B;O'Connor TJ;Isberg RR;Melia TJ;Roy CR

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Eukaryotic cells can use the autophagy pathway to defend against microbes that gain access to the cytosol or reside in pathogen-modified vacuoles. It remains unclear if pathogens have evolved specific mechanisms to manipulate autophagy. Here we find that the intracellular pathogen Legionella pneumophila could interfere with autophagy using the bacterial effector protein RavZ to directly uncouple Atg8 proteins attached to phosphatidylethanolamine on autophagosome membranes. RavZ hydrolyzed the amide bond between the carboxyl-terminal glycine residue and an adjacent aromatic residue in Atg8 proteins, producing an Atg8 protein that could not be reconjugated by Atg7 and Atg3. Thus, intracellular pathogens can inhibit autophagy by irreversibly inactivating Atg8 proteins during infection.
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发表时间: 2000-11-23
期刊: NATURE
影响因子: 64.8
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