title: Mutation of SENP1/SuPr-2 reveals an essential role for desumoylation in mouse development.
abstract: The covalent modification of proteins by the small ubiquitin-like protein SUMO has been implicated in the regulation of numerous biological processes, including nucleocytoplasmic transport, genomic stability, and gene transcription. Sumoylation occurs by a multienzyme process similar to ubiquitination and, in Saccharomyces cerevisiae, is reversed by desumoylating enzymes encoded by the Ulp1 and Smt4/Ulp2 genes. The physiological importance of desumoylation has been revealed by mutations in either gene, which lead to nonoverlapping defects in cell cycle transition and meiosis. Several mammalian Ulp homologues have been identified, but, to date, nothing is known of the phenotypic effects of their loss of function. Here, we describe a random retroviral insertional mutation of one homolog, mouse SENP1/SuPr-2. The mutation causes increased steady-state levels of the sumoylated forms of a number of proteins and results in placental abnormalities incompatible with embryonic development. Our findings provide the first insight into the critical importance of regulating sumoylation in mammals.
authors.affiliation: Laboratory of Protein Dynamics and Signaling, National Cancer Institute, NCI-Frederick, Bldg. 560, Rm. 12-90, Frederick, MD 21702, USA.
authors.forename: Taihei
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Prashant
authors.initials: P
authors.lastname: Sharma
authors.forename: Meropi
authors.initials: M
authors.lastname: Athanasiou
authors.forename: Amit
authors.initials: A
authors.lastname: Kumar
authors.forename: Satoru
authors.initials: S
authors.lastname: Yamada
authors.forename: Michael R
authors.initials: MR
authors.lastname: Kuehn
mesh_terms: D000818:Animals; D001483:Base Sequence; D003546:Cysteine Endopeptidases; D004622:Embryo, Mammalian / Q000033:anatomy & histology / Q000502:physiology; D010450:Endopeptidases / Q000235:genetics* / Q000378:metabolism*; D004742:Enhancer Elements, Genetic; D005786:Gene Expression Regulation; D006801:Humans; D051379:Mice; D008822:Mice, Transgenic; D008969:Molecular Sequence Data; D009154:Mutation; D010641:Phenotype; D010920:Placenta / Q000002:abnormalities / Q000166:cytology / Q000378:metabolism; D025842:SUMO-1 Protein / Q000235:genetics / Q000378:metabolism*; D016415:Sequence Alignment; D014452:Ubiquitins / Q000378:metabolism; D016662:Virus Integration
chemical_list: D025842:SUMO-1 Protein; C117908:Sumo3 protein, mouse; D014452:Ubiquitins; D010450:Endopeptidases; C404512:SENP1 protein, human; D003546:Cysteine Endopeptidases; C501974:Senp1 protein, mouse