Polyglutamine tracts regulate autophagy.

Avraham Ashkenazi, Carla F Bento, Thomas Ricketts, Mariella Vicinanza, Farah Siddiqi, Mariana Pavel, Ferdinando Squitieri, Maarten C Hardenberg, Sara Imarisio, Fiona M Menzies & David Rubinsztein
Expansions of polyglutamine (polyQ) tracts in different proteins cause 9 neurodegenerative conditions, such as Huntington disease and various ataxias. However, many normal mammalian proteins contain shorter polyQ tracts. As these are frequently conserved in multiple species, it is likely that some of these polyQ tracts have important but unknown biological functions. Here we review our recent study showing that the polyQ domain of the deubiquitinase ATXN3/ataxin-3 enables its interaction with BECN1/beclin 1, a key macroautophagy/autophagy...
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