Reference: Eisele F and Wolf DH (2008) Degradation of misfolded protein in the cytoplasm is mediated by the ubiquitin ligase Ubr1. FEBS Lett 582(30):4143-6

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Abstract


Protein quality control and subsequent elimination of terminally misfolded proteins occurs via the ubiquitin-proteasome system. Tagging of misfolded proteins with ubiquitin for degradation depends on a cascade of reactions involving an ubiquitin activating enzyme (E1), ubiquitin conjugating enzymes (E2) and ubiquitin ligases (E3). While ubiquitin ligases responsible for targeting misfolded secretory proteins to proteasomal degradation (ERAD) have been uncovered, no such E3 enzymes have been found for elimination of misfolded cytoplasmic proteins in yeast. Here we report on the discovery of Ubr1, the E3 ligase of the N-end rule pathway, to be responsible for targeting misfolded cytosoplasmic protein to proteasomal degradation.

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Journal Article
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Eisele F, Wolf DH
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