Journal
FEBS LETTERS
Volume 508, Issue 1, Pages 23-28Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0014-5793(01)03016-2
Keywords
autophagy; cytoplasm to vacuole targeting pathway; aminopeptidase 1
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We here report the identification of AUT10 as a novel gene required for both the cytoplasm to vacuole targeting of proaminopeptidase I and starvation-induced autophagy. aut10 Delta cells are impaired in maturation of proaminopeptidase I under starvation and non-starvation conditions. A lack of Aut10p causes a defect in autophagy prior to vacuolar uptake of autophagosomes. Homozygous aut]OA diploids do not sporulate. Vacuolar acidification indicated by accumulation of quinacrine is normal in aut10 Delta cells and mature vacuolar proteinases are present. A biologically active Ha-tagged Aut10p, chromosomally expressed from its endogenous promoter, localizes in indirect immunofluorescence microscopy in the cytosol and on granulated structures, which appear clustered around the vacuolar membrane. This localization differs from known autophagy proteins. (C) 2001 Federation of European Biochemical Societies. Published by Elsevier Science B.V. All rights reserved.
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