Abstract

Eukaryotic cells employ autophagy to degrade damaged or obsolete organelles and proteins. Central to this process is the formation of autophagosomes, double-membrane vesicles responsible for delivering cytoplasmic material to lysosomes. In the past decade many autophagy-related genes, ATG, have been identified that are required for selective and/or nonselective autophagic functions. In all types of autophagy, a core molecular machinery has a critical role in forming sequestering vesicles, the autophagosome, which is the hallmark morphological feature of this dynamic process. Additional components allow autophagy to adapt to the changing needs of the cell.

1. Zhiping Xie and Daniel J. Klionsky are in the Life Sciences Institute and Departments of Molecular, Cellular and Developmental Biology and Biological Chemistry, University of Michigan, Ann Arbor, MI 48109, USA. e-mail: klionsky@umich.edu

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