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Results: 61 to 62 of 62

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Mechanisms of oncogene cooperation: activation and inactivation of a growth antagonist.
Ragozzino MM, Kuo A, DeGregori J, Kohl N, Ruley HE
(1991) Environ Health Perspect 93: 97-103
MeSH Terms: Adenovirus Early Proteins, Animals, Antigens, Polyomavirus Transforming, Cell Line, Cell Line, Transformed, Cell Transformation, Neoplastic, Cricetinae, Epistasis, Genetic, Fibroblasts, Gene Expression Regulation, Neoplastic, Genes, Retinoblastoma, Genes, ras, Genetic Complementation Test, Hybrid Cells, Mesocricetus, Mice, Mice, Nude, Neoplasms, Experimental, Oncogene Proteins, Viral, Oncogenes, Phenotype, Platelet-Derived Growth Factor, Proto-Oncogene Proteins, Proto-Oncogene Proteins c-sis, Proto-Oncogene Proteins p21(ras), Rats
Show Abstract · Added May 29, 2014
Gene transfer experiments have defined limitations with regard to the ability of individual oncogenes to transform cultured cells to a tumorigenic state. The stable transformation of REF52 cells by either the ras or sis oncogenes requires the continuous expression of a second collaborating oncogene, such as adenovirus-5 E1A or SV40 large T-antigen. Our studies suggest that the function of the nuclear collaborators is to antagonize dominant growth controls which limit the ability of REF52 cells to proliferate in response to mitogenic stimuli.
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26 MeSH Terms
Yeast casein kinase I homologues: an essential gene pair.
Robinson LC, Hubbard EJ, Graves PR, DePaoli-Roach AA, Roach PJ, Kung C, Haas DW, Hagedorn CH, Goebl M, Culbertson MR
(1992) Proc Natl Acad Sci U S A 89: 28-32
MeSH Terms: Amino Acid Sequence, Casein Kinase I, Casein Kinases, Cloning, Molecular, Gene Expression, Genes, Fungal, Genes, Suppressor, Genetic Complementation Test, Molecular Sequence Data, Multigene Family, Mutation, Protein Kinases, Restriction Mapping, Saccharomyces cerevisiae, Saccharomyces cerevisiae Proteins, Sequence Alignment
Show Abstract · Added March 13, 2015
We report the isolation of an essential pair of Saccharomyces cerevisiae genes that encode protein kinase homologues. The two genes were independently isolated as dosage-dependent suppressors. Increased dosage of YCK1 suppressed defects caused by reduced SNF1 protein kinase activity, and increased dosage of YCK2 relieved sensitivity of wild-type cells to salt stress. The two genes function identically in the two growth assays, and loss of function of either gene alone has no discernible effect on growth. However, loss of function of both genes results in inviability. The two predicted protein products share 77% overall amino acid identity and contain sequence elements conserved among protein kinases. Partial sequence obtained for rabbit casein kinase I shares 64% identity with the two yeast gene products. Moreover, an increase in casein kinase I activity is observed in extracts from cells overexpressing YCK2. Thus YCK1 and YCK2 appear to encode casein kinase I homologues.
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16 MeSH Terms