Peroxisomal matrix protein receptor ubiquitination and recycling

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The peroxisomal targeting signal type1 (PTS1) receptor Pex5 is required for the peroxisomal targeting of most matrix proteins. Pex5 recognises target proteins in the cytosol and directs them to the peroxisomal membrane where cargo is released into the matrix, and the receptor shuttles back to the cytosol. Recently, it has become evident that the membrane-bound Pex5 can be modified by mono- and polyubiquitination. This review summarises recent results on Pex5 ubiquitination and on the role of the AAA peroxins Pex1 and Pex6 as dislocases required for the release of Pex5 from the membrane to the cytosol where the receptor is either degraded by proteasomes or made available for another round of protein import into peroxisomes. © 2006 Elsevier B.V. All rights reserved.




Thoms, S., & Erdmann, R. (2006, December). Peroxisomal matrix protein receptor ubiquitination and recycling. Biochimica et Biophysica Acta - Molecular Cell Research.

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