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Wiley, FEBS Letters, 19(586), p. 3179-3186, 2012

DOI: 10.1016/j.febslet.2012.06.032

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DOR undergoes nucleo-cytoplasmic shuttling, which involves passage through the nucleolus

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Data provided by SHERPA/RoMEO

Abstract

DOR is a bi-functional protein that regulates transcription and enhances starvation-induced autophagy. While autophagy has been mostly described as a stress-response mechanism, cells also need autophagy to maintain homeostasis in basal conditions. However, the mechanisms regulating basal autophagy still remain unknown. Our results show that DOR acts in basal autophagy. Indeed, DOR already undergoes nucleo-cytoplasmic shuttling in basal conditions and, surprisingly, DOR exits continuously the nucleus and traverses the nucleolus. However, the nucleolus integrity is not essential for both DOR nucleo-cytoplasmic shuttling and DOR function on basal autophagy. Taken together, we propose that DOR exit from the nucleus is essential for basal autophagy stimulation even under nucleolus disruption.