Merkle, T., Haizel, T., Matsumoto, T., Harter, K., Dallmann, G., Nagy, F. (October 1994) Phenotype of the Fission Yeast-Cell Cycle Regulatory Mutant Pim1-46 Is Suppressed by a Tobacco Cdna-Encoding a Small, Ran-Like Gtp-Binding Protein. Plant Journal, 6 (4). pp. 555-565. ISSN 0960-7412
Abstract
Mutations in which the onset of mitosis is uncoupled from the completion of DNA replication has recently been described. Characterization of these mutants led to the identification of Pim1/Spi1 in fission yeast and RCC1/Ran proteins in mammalian cells. Their Saccharomyces cerevisae homologues, the MTR1/ CNR1 proteins, appear to be involved in controlling RNA metabolism and transport. Here the isolation and partial characterization of plant cDNA clones which encode proteins homologous to the mammalian/fission yeast/budding yeast Ran/Spi/CNR proteins are reported. Higher plants appear to contain more than one gene per haploid genome which codes for Ran proteins. These genes are expressed in different plant tissues, including root tips and stems, known to contain mitotically active cells. The tobacco Ran-like proteins, like their mammalian and yeast homologues, are soluble proteins which are found in the cytoplasm and in the nucleus. In addition, it has been shown that overexpression of the tobacco Nt-Ran-A1 cDNA suppressed the phenotype of the temperature-sensitive fission yeast pim1-46 mutant. These results suggest that the plant Ran genes can be functionally equivalent to the mammalian/fission yeast/budding yeast Ran/Spi/CNR genes and that they may play a role: (i) in maintaining a coordinated cell cycle; (ii) in controlling RNA metabolism and transport in higher plants; and/or (iii) in protein import into the nucleus.
| Item Type: | Paper |
|---|---|
| Uncontrolled Keywords: | PREMATURE CHROMOSOME CONDENSATION RCC1 GENES MAINTENANCE SUPERFAMILY P34CDC2 MITOSIS RAN/TC4 CLONES IMPORT |
| Subjects: | bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > DNA replication bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > GTP binding protein organism description > yeast |
| CSHL Authors: | |
| Communities: | CSHL labs > Beach lab |
| Depositing User: | Matt Covey |
| Date: | October 1994 |
| Date Deposited: | 30 Jun 2015 16:42 |
| Last Modified: | 30 Jun 2015 16:42 |
| Related URLs: | |
| URI: | https://repository.cshl.edu/id/eprint/31434 |
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