Rfu1: stimulus for the ubiquitin economy.
During cellular stress, monoubiquitin is in demand due to the accumulation of misfolded proteins that require proteasomal degradation. Kimura et al. (2009) now show in yeast that monoubiquitin levels are bolstered during stress conditions by downregulation of the protein Rfu1, an inhibitor of the deubiquitinating enzyme Doa4.
Burnham Institute for Medical Research, La Jolla, CA 92037, USA. dwolf@burnham.org
Dieter A
DA
Wolf
Matthew D
MD
Petroski
D000494:Allosteric Regulation; D010450:Endopeptidases / Q000235:genetics / Q000378:metabolism*; D056827:Endosomal Sorting Complexes Required for Transport; D011992:Endosomes / Q000378:metabolism; D006801:Humans; D009154:Mutation; D046988:Proteasome Endopeptidase Complex / Q000235:genetics; D011485:Protein Binding; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction; D025801:Ubiquitin / Q000378:metabolism; D043222:Ubiquitin Thiolesterase; D043743:Ubiquitin-Protein Ligase Complexes / Q000378:metabolism
C084434:DOA4 protein, S cerevisiae; D056827:Endosomal Sorting Complexes Required for Transport; D029701:Saccharomyces cerevisiae Proteins; D025801:Ubiquitin; D043743:Ubiquitin-Protein Ligase Complexes; D010450:Endopeptidases; D043222:Ubiquitin Thiolesterase; D046988:Proteasome Endopeptidase Complex