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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

ATG23, a novel gene required for maturation of proaminopeptidase I, but not for autophagy.

In rich media proaminopeptidase I is targeted to the vacuole via the Cvt pathway and during starvation via autophagy. We here identify Atg23 (Ylr431c), a protein of so far unknown function, as a novel component essential for proaminopeptidase I maturation under non-starvation conditions. Maturation of proaminopeptidase I takes place in starved atg23Delta cells. Selective vacuolar targeting of the autophagosomal marker GFP-Aut7 and the accumulation of autophagic bodies during starvation in the presence of phenylmethylsulfonyl fluoride suggest that autophagy occurs in atg23Delta cells but at a reduced rate. In atg23Delta cells mature vacuolar carboxypeptidase Y is present and accumulation of quinacrine suggests no significant defect in vacuolar acidification. Furthermore, growth of atg23Delta cells on nitrocellulose detects no significant secretion of carboxypeptidase Y.[1]

References

  1. ATG23, a novel gene required for maturation of proaminopeptidase I, but not for autophagy. Meiling-Wesse, K., Bratsika, F., Thumm, M. FEMS Yeast Res. (2004) [Pubmed]
 
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