alexa Cis1 Atg31 is required for autophagosome formation in Saccharomyces cerevisiae.
Molecular Biology

Molecular Biology

Cell & Developmental Biology

Author(s): Kabeya Y, Kawamata T, Suzuki K, Ohsumi Y

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Abstract Autophagy is the bulk degradation of cytosolic materials in lysosomes/vacuoles of eukaryotic cells. In the yeast Saccharomyces cerevisiae, 17 Atg proteins are known to be involved in autophagosome formation. Genome wide analyses have shown that Atg17 interacts with numerous proteins. Further studies on these interacting proteins may provide further insights into membrane dynamics during autophagy. Here, we identify Cis1/Atg31 as a protein that exhibits similar phenotypes to Atg17. ATG31 null cells were defective in autophagy and lost viability under starvation conditions. Localization of Atg31 to pre-autophagosomal structures (PAS) was dependent on Atg17. Coimmunoprecipitation experiments indicated that Atg31 interacts with Atg17. Together, Atg31 is a novel protein that, in concert with Atg17, is required for proper autophagosome formation. This article was published in Biochem Biophys Res Commun and referenced in Cell & Developmental Biology

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