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The circuitry of cargo flux in the ESCRT pathway
Correspondence to James H. Hurley: hurley{at}helix.nih.gov
The endosomal sorting complex required for transport (ESCRT) complexes sort ubiquitinated membrane proteins into multivesicular bodies, which is a key step in the lysosomal degradation pathway. Shields et al. (Shields, S.B., A.J. Oestreich, S. Winistorfer, D. Nguyen, J.A. Payne, D.J. Katzmann, and R. Piper. 2009. J. Cell Biol. 185:213–224) identify a new ubiquitin-binding site in ESCRT-I and provide evidence that the upstream ESCRT-I and -II complexes sort cargo in parallel rather than in series.
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