title: Proteins containing the UBA domain are able to bind to multi-ubiquitin chains.
abstract: The UBA domain is a motif found in a variety of proteins, some of which are associated with the ubiquitin-proteasome system. We describe the isolation of a fission-yeast gene, mud1+, which encodes a UBA domain containing protein that is able to bind multi-ubiquitin chains. We show that the UBA domain is responsible for this activity. Two other proteins containing this motif, the fission-yeast homologues of Rad23 and Dsk2, are also shown to bind multi-ubiquitin chains via their UBA domains. These two proteins are implicated, along with the fission-yeast Pus1(S5a/Rpn10) subunit of the 26 S proteasome, in the recognition and turnover of substrates by this proteolytic complex.
authors.affiliation: MRC Human Genetics Unit, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, UK.
authors.forename: C R
authors.initials: CR
authors.lastname: Wilkinson
authors.forename: M
authors.initials: M
authors.lastname: Seeger
authors.forename: R
authors.initials: R
authors.lastname: Hartmann-Petersen
authors.forename: M
authors.initials: M
authors.lastname: Stone
authors.forename: M
authors.initials: M
authors.lastname: Wallace
authors.forename: C
authors.initials: C
authors.lastname: Semple
authors.forename: C
authors.initials: C
authors.lastname: Gordon
mesh_terms: D020816:Amino Acid Motifs; D018797:Cell Cycle Proteins / Q000378:metabolism; D003546:Cysteine Endopeptidases / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000378:metabolism; D005656:Fungal Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D005800:Genes, Fungal; D017930:Genes, Reporter / Q000235:genetics; D009097:Multienzyme Complexes / Q000378:metabolism; D010641:Phenotype; D046988:Proteasome Endopeptidase Complex; D011485:Protein Binding; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins; D012568:Schizosaccharomyces / Q000737:chemistry* / Q000235:genetics / Q000502:physiology; D029702:Schizosaccharomyces pombe Proteins; D020349:Surface Plasmon Resonance; D025801:Ubiquitin / Q000378:metabolism*; D014452:Ubiquitins / Q000378:metabolism
chemical_list: D018797:Cell Cycle Proteins; D004268:DNA-Binding Proteins; C100415:DSK2 protein, S cerevisiae; D005656:Fungal Proteins; D009097:Multienzyme Complexes; C490846:RAD23 protein, S cerevisiae; C490845:RHP23 protein, S pombe; D011993:Recombinant Fusion Proteins; D029701:Saccharomyces cerevisiae Proteins; D029702:Schizosaccharomyces pombe Proteins; D025801:Ubiquitin; D014452:Ubiquitins; D003546:Cysteine Endopeptidases; D046988:Proteasome Endopeptidase Complex