title: PML and COP1--two proteins with much in common.
abstract: The recent discovery that the RING-finger domain is involved in mediating ubiquitin transfer from ubiquitin-conjugating enzymes to substrates have highlighted the importance of protein degradation through the ubiquitin-proteasome pathway in the regulation of different cellular processes. Two RING-finger-containing proteins, the promyelocytic leukemia protein (PML) from mammals and the constitutive photomorphogenic protein (COP1) from plants, show conspicuous similarities in their cellular distribution, dynamics and structure, indicating that they share a related function. Comparison of these two proteins suggests that they are involved in regulating the targeting of nuclear proteins to specific nuclear compartments for degradation through the ubiquitin-proteasome pathway.
authors.affiliation: Instituto de Bioquímica Vegetal y Fotosíntesis, Centro de Investigaciones Científicas Isla de la Cartuja, Américo Vespucio s/n, E-41092, Sevilla, Spain. jcreyes@cica.es
authors.forename: J C
authors.initials: JC
authors.lastname: Reyes
mesh_terms: D000818:Animals; D017360:Arabidopsis / Q000378:metabolism; D029681:Arabidopsis Proteins; D002352:Carrier Proteins / Q000737:chemistry / Q000378:metabolism*; D003546:Cysteine Endopeptidases / Q000378:metabolism; D051379:Mice; D009097:Multienzyme Complexes / Q000378:metabolism; D009363:Neoplasm Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D009687:Nuclear Proteins; D010940:Plant Proteins / Q000737:chemistry / Q000378:metabolism*; D000071156:Promyelocytic Leukemia Protein; D046988:Proteasome Endopeptidase Complex; D014157:Transcription Factors / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D025521:Tumor Suppressor Proteins; D044767:Ubiquitin-Protein Ligases; D014452:Ubiquitins / Q000378:metabolism; D016335:Zinc Fingers
chemical_list: D029681:Arabidopsis Proteins; D002352:Carrier Proteins; D009097:Multienzyme Complexes; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D010940:Plant Proteins; C513293:Pml protein, mouse; D000071156:Promyelocytic Leukemia Protein; D014157:Transcription Factors; D025521:Tumor Suppressor Proteins; D014452:Ubiquitins; C471983:AT2G32950 protein, Arabidopsis; D044767:Ubiquitin-Protein Ligases; D003546:Cysteine Endopeptidases; D046988:Proteasome Endopeptidase Complex