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Reference: Stephan JS, et al. (2010) The Tor and cAMP-dependent protein kinase signaling pathways coordinately control autophagy in Saccharomyces cerevisiae. Autophagy 6(2):294-5

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Abstract


Macroautophagy (hereafter autophagy) is a conserved membrane trafficking pathway responsible for the turnover of cytosolic protein and organelles during periods of nutrient deprivation. This pathway is also linked to a number of processes important for human health, including tumor suppression, innate immunity and the clearance of protein aggregates. As a result, there is tremendous interest in autophagy as a potential point of therapeutic intervention in a variety of pathological states. To achieve this goal, it is imperative that we develop a thorough understanding of the normal regulation of this process in eukaryotic cells. The Tor protein kinases clearly constitute a key element of this control as Tor activity inhibits this degradative process in all organisms examined, from yeast to man. Here, we discuss recent work indicating that the cAMP-dependent protein kinase (PKA) also plays a critical role in controlling autophagy in the budding yeast, Saccharomyces cerevisiae. A model describing how PKA activity might influence this degradative process, and how this control might be integrated with that of the Tor pathway, is presented.

Reference Type
Journal Article
Authors
Stephan JS, Yeh YY, Ramachandran V, Deminoff SJ, Herman PK
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