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. 1991 May 1;88(9):3574–3578. doi: 10.1073/pnas.88.9.3574

The CDC7 protein of Saccharomyces cerevisiae is a phosphoprotein that contains protein kinase activity.

H J Yoon 1, J L Campbell 1
PMCID: PMC51494  PMID: 2023904

Abstract

The CDC7 protein of Saccharomyces cerevisiae may be involved in the G1/S-phase transition and/or in the initiation of mitotic DNA synthesis. The CDC7 gene has two in-frame AUG codons as possible translation start sites, which would produce 58- and 56-kDa proteins, respectively. Both p58 and p56 derived from recombinant plasmids complement the temperature-sensitive growth defect of the cdc7-1 allele. To determine the biochemical function of the CDC7 protein, the CDC7 gene was cloned and polyclonal antibodies were produced against the CDC7 protein. CDC7 immune complexes prepared from yeast with these antibodies phosphorylate histone H1. Kinase activity is thermolabile in strains carrying the cdc7-1 temperature-sensitive mutant allele and is elevated greater than 10-fold in strains carrying plasmids overexpressing either p56 or p58, confirming that the kinase in the immunoprecipitates is the CDC7 gene product. In addition, we show that CDC7 is a phosphoprotein itself. Indirect immunofluorescence and biochemical fractionation show that the CDC7 protein is present at relatively high concentrations in the nucleus compared with the cytoplasm, suggesting that nuclear proteins may be substrates for the CDC7 protein.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Adams A. E., Pringle J. R. Relationship of actin and tubulin distribution to bud growth in wild-type and morphogenetic-mutant Saccharomyces cerevisiae. J Cell Biol. 1984 Mar;98(3):934–945. doi: 10.1083/jcb.98.3.934. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Bahman M., Buck V., White A., Rosamond J. Characterisation of the CDC7 gene product of Saccharomyces cerevisiae as a protein kinase needed for the initiation of mitotic DNA synthesis. Biochim Biophys Acta. 1988 Dec 20;951(2-3):335–343. doi: 10.1016/0167-4781(88)90104-2. [DOI] [PubMed] [Google Scholar]
  3. Byers B., Goetsch L. Duplication of spindle plaques and integration of the yeast cell cycle. Cold Spring Harb Symp Quant Biol. 1974;38:123–131. doi: 10.1101/sqb.1974.038.01.016. [DOI] [PubMed] [Google Scholar]
  4. Clark M. W., Abelson J. The subnuclear localization of tRNA ligase in yeast. J Cell Biol. 1987 Oct;105(4):1515–1526. doi: 10.1083/jcb.105.4.1515. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Ham J., Moore D., Rosamond J., Johnston I. R. Transcriptional analysis of the CDC7 protein kinase gene of Saccharomyces cerevisiae. Nucleic Acids Res. 1989 Jul 25;17(14):5781–5792. doi: 10.1093/nar/17.14.5781. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Hanks S. K., Quinn A. M., Hunter T. The protein kinase family: conserved features and deduced phylogeny of the catalytic domains. Science. 1988 Jul 1;241(4861):42–52. doi: 10.1126/science.3291115. [DOI] [PubMed] [Google Scholar]
  7. Hartwell L. H. Sequential function of gene products relative to DNA synthesis in the yeast cell cycle. J Mol Biol. 1976 Jul 15;104(4):803–817. doi: 10.1016/0022-2836(76)90183-2. [DOI] [PubMed] [Google Scholar]
  8. Hartwell L. H. Three additional genes required for deoxyribonucleic acid synthesis in Saccharomyces cerevisiae. J Bacteriol. 1973 Sep;115(3):966–974. doi: 10.1128/jb.115.3.966-974.1973. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Hereford L. M., Hartwell L. H. Sequential gene function in the initiation of Saccharomyces cerevisiae DNA synthesis. J Mol Biol. 1974 Apr 15;84(3):445–461. doi: 10.1016/0022-2836(74)90451-3. [DOI] [PubMed] [Google Scholar]
  10. Hollingsworth R. E., Jr, Sclafani R. A. DNA metabolism gene CDC7 from yeast encodes a serine (threonine) protein kinase. Proc Natl Acad Sci U S A. 1990 Aug;87(16):6272–6276. doi: 10.1073/pnas.87.16.6272. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Hurt E. C., McDowall A., Schimmang T. Nucleolar and nuclear envelope proteins of the yeast Saccharomyces cerevisiae. Eur J Cell Biol. 1988 Aug;46(3):554–563. [PubMed] [Google Scholar]
  12. Jong A. Y., Clark M. W., Gilbert M., Oehm A., Campbell J. L. Saccharomyces cerevisiae SSB1 protein and its relationship to nucleolar RNA-binding proteins. Mol Cell Biol. 1987 Aug;7(8):2947–2955. doi: 10.1128/mcb.7.8.2947. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Kilmartin J. V., Adams A. E. Structural rearrangements of tubulin and actin during the cell cycle of the yeast Saccharomyces. J Cell Biol. 1984 Mar;98(3):922–933. doi: 10.1083/jcb.98.3.922. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Kuo C. L., Campbell J. L. Cloning of Saccharomyces cerevisiae DNA replication genes: isolation of the CDC8 gene and two genes that compensate for the cdc8-1 mutation. Mol Cell Biol. 1983 Oct;3(10):1730–1737. doi: 10.1128/mcb.3.10.1730. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. Lue N. F., Chasman D. I., Buchman A. R., Kornberg R. D. Interaction of GAL4 and GAL80 gene regulatory proteins in vitro. Mol Cell Biol. 1987 Oct;7(10):3446–3451. doi: 10.1128/mcb.7.10.3446. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Mendenhall M. D., Jones C. A., Reed S. I. Dual regulation of the yeast CDC28-p40 protein kinase complex: cell cycle, pheromone, and nutrient limitation effects. Cell. 1987 Sep 11;50(6):927–935. doi: 10.1016/0092-8674(87)90519-8. [DOI] [PubMed] [Google Scholar]
  17. Njagi G. D., Kilbey B. J. cdc7-1 a temperature sensitive cell-cycle mutant which interferes with induced mutagenesis in Saccharomyces cerevisiae. Mol Gen Genet. 1982;186(4):478–481. doi: 10.1007/BF00337951. [DOI] [PubMed] [Google Scholar]
  18. Patterson M., Sclafani R. A., Fangman W. L., Rosamond J. Molecular characterization of cell cycle gene CDC7 from Saccharomyces cerevisiae. Mol Cell Biol. 1986 May;6(5):1590–1598. doi: 10.1128/mcb.6.5.1590. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Peterson T. A., Yochem J., Byers B., Nunn M. F., Duesberg P. H., Doolittle R. F., Reed S. I. A relationship between the yeast cell cycle genes CDC4 and CDC36 and the ets sequence of oncogenic virus E26. Nature. 1984 Jun 7;309(5968):556–558. doi: 10.1038/309556a0. [DOI] [PubMed] [Google Scholar]
  20. Reed S. I., Hadwiger J. A., Lörincz A. T. Protein kinase activity associated with the product of the yeast cell division cycle gene CDC28. Proc Natl Acad Sci U S A. 1985 Jun;82(12):4055–4059. doi: 10.1073/pnas.82.12.4055. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Reed S. I. The selection of S. cerevisiae mutants defective in the start event of cell division. Genetics. 1980 Jul;95(3):561–577. doi: 10.1093/genetics/95.3.561. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Reneke J. E., Blumer K. J., Courchesne W. E., Thorner J. The carboxy-terminal segment of the yeast alpha-factor receptor is a regulatory domain. Cell. 1988 Oct 21;55(2):221–234. doi: 10.1016/0092-8674(88)90045-1. [DOI] [PubMed] [Google Scholar]
  23. Schild D., Byers B. Meiotic effects of DNA-defective cell division cycle mutations of Saccharomyces cerevisiae. Chromosoma. 1978 Dec 21;70(1):109–130. doi: 10.1007/BF00292220. [DOI] [PubMed] [Google Scholar]
  24. Sclafani R. A., Patterson M., Rosamond J., Fangman W. L. Differential regulation of the yeast CDC7 gene during mitosis and meiosis. Mol Cell Biol. 1988 Jan;8(1):293–300. doi: 10.1128/mcb.8.1.293. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Sweder K. S., Rhode P. R., Campbell J. L. Purification and characterization of proteins that bind to yeast ARSs. J Biol Chem. 1988 Nov 25;263(33):17270–17277. [PubMed] [Google Scholar]
  26. de Boer H. A., Comstock L. J., Vasser M. The tac promoter: a functional hybrid derived from the trp and lac promoters. Proc Natl Acad Sci U S A. 1983 Jan;80(1):21–25. doi: 10.1073/pnas.80.1.21. [DOI] [PMC free article] [PubMed] [Google Scholar]

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