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. 1994 Oct 11;22(20):4229–4233. doi: 10.1093/nar/22.20.4229

Mutant isolation of mouse DNA topoisomerase II alpha in yeast.

N Adachi 1, H Ikeda 1, A Kikuchi 1
PMCID: PMC331930  PMID: 7937150

Abstract

For characterizing in vivo functions of a mammalian protein, it is informative to obtain conditional mutations and apply them to the mouse genetic system. However, the isolation of conditional mutations has been quite difficult in cultured cells. We report here that functional expression of a heterologous mammalian gene in the yeast Saccharomyces cerevisiae provides a system for isolating mutated genes. We found that the cloned mouse TOP2 alpha cDNA, which encodes mouse DNA topoisomerase II (topo II) alpha, could rescue the lethal phenotype caused by yeast top2 null mutation. In order to generate and select temperature-sensitive mouse topo II alpha, an expression plasmid was mutagenized in vitro and was transformed, using the plasmid shuffling method, into the yeast strain, in which the endogenous TOP2 gene had been disrupted. We observed that one of such clone of yeast cells harboring a mutagenized mouse TOP2 alpha showed temperature-sensitive growth. Enzymatic assays and sequencing analysis revealed that this phenotype was caused by the thermosensitive nature of the mutant mouse protein, which has isoleucine at amino acid 961 instead of threonine. Therefore we have isolated the first conditional mutation in the mouse TOP2 alpha.

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Selected References

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

  1. Adachi N., Miyaike M., Ikeda H., Kikuchi A. Characterization of cDNA encoding the mouse DNA topoisomerase II that can complement the budding yeast top2 mutation. Nucleic Acids Res. 1992 Oct 25;20(20):5297–5303. doi: 10.1093/nar/20.20.5297. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Berrios M., Osheroff N., Fisher P. A. In situ localization of DNA topoisomerase II, a major polypeptide component of the Drosophila nuclear matrix fraction. Proc Natl Acad Sci U S A. 1985 Jun;82(12):4142–4146. doi: 10.1073/pnas.82.12.4142. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Boeke J. D., LaCroute F., Fink G. R. A positive selection for mutants lacking orotidine-5'-phosphate decarboxylase activity in yeast: 5-fluoro-orotic acid resistance. Mol Gen Genet. 1984;197(2):345–346. doi: 10.1007/BF00330984. [DOI] [PubMed] [Google Scholar]
  4. Brill S. J., Sternglanz R. Transcription-dependent DNA supercoiling in yeast DNA topoisomerase mutants. Cell. 1988 Jul 29;54(3):403–411. doi: 10.1016/0092-8674(88)90203-6. [DOI] [PubMed] [Google Scholar]
  5. Christman M. F., Dietrich F. S., Fink G. R. Mitotic recombination in the rDNA of S. cerevisiae is suppressed by the combined action of DNA topoisomerases I and II. Cell. 1988 Nov 4;55(3):413–425. doi: 10.1016/0092-8674(88)90027-x. [DOI] [PubMed] [Google Scholar]
  6. Chung T. D., Drake F. H., Tan K. B., Per S. R., Crooke S. T., Mirabelli C. K. Characterization and immunological identification of cDNA clones encoding two human DNA topoisomerase II isozymes. Proc Natl Acad Sci U S A. 1989 Dec;86(23):9431–9435. doi: 10.1073/pnas.86.23.9431. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. DiNardo S., Voelkel K., Sternglanz R. DNA topoisomerase II mutant of Saccharomyces cerevisiae: topoisomerase II is required for segregation of daughter molecules at the termination of DNA replication. Proc Natl Acad Sci U S A. 1984 May;81(9):2616–2620. doi: 10.1073/pnas.81.9.2616. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Drake F. H., Hofmann G. A., Bartus H. F., Mattern M. R., Crooke S. T., Mirabelli C. K. Biochemical and pharmacological properties of p170 and p180 forms of topoisomerase II. Biochemistry. 1989 Oct 3;28(20):8154–8160. doi: 10.1021/bi00446a029. [DOI] [PubMed] [Google Scholar]
  9. Drake F. H., Zimmerman J. P., McCabe F. L., Bartus H. F., Per S. R., Sullivan D. M., Ross W. E., Mattern M. R., Johnson R. K., Crooke S. T. Purification of topoisomerase II from amsacrine-resistant P388 leukemia cells. Evidence for two forms of the enzyme. J Biol Chem. 1987 Dec 5;262(34):16739–16747. [PubMed] [Google Scholar]
  10. Earnshaw W. C., Halligan B., Cooke C. A., Heck M. M., Liu L. F. Topoisomerase II is a structural component of mitotic chromosome scaffolds. J Cell Biol. 1985 May;100(5):1706–1715. doi: 10.1083/jcb.100.5.1706. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Fujita A., Matsumoto S., Kuhara S., Misumi Y., Kobayashi H. Cloning of the yeast SFL2 gene: its disruption results in pleiotropic phenotypes characteristic for tup1 mutants. Gene. 1990 Apr 30;89(1):93–99. doi: 10.1016/0378-1119(90)90210-i. [DOI] [PubMed] [Google Scholar]
  12. Gasser S. M., Laroche T., Falquet J., Boy de la Tour E., Laemmli U. K. Metaphase chromosome structure. Involvement of topoisomerase II. J Mol Biol. 1986 Apr 20;188(4):613–629. doi: 10.1016/s0022-2836(86)80010-9. [DOI] [PubMed] [Google Scholar]
  13. Goto T., Wang J. C. Yeast DNA topoisomerase II is encoded by a single-copy, essential gene. Cell. 1984 Apr;36(4):1073–1080. doi: 10.1016/0092-8674(84)90057-6. [DOI] [PubMed] [Google Scholar]
  14. Hoffman C. S., Winston F. A ten-minute DNA preparation from yeast efficiently releases autonomous plasmids for transformation of Escherichia coli. Gene. 1987;57(2-3):267–272. doi: 10.1016/0378-1119(87)90131-4. [DOI] [PubMed] [Google Scholar]
  15. Holm C., Goto T., Wang J. C., Botstein D. DNA topoisomerase II is required at the time of mitosis in yeast. Cell. 1985 Jun;41(2):553–563. doi: 10.1016/s0092-8674(85)80028-3. [DOI] [PubMed] [Google Scholar]
  16. Ito H., Fukuda Y., Murata K., Kimura A. Transformation of intact yeast cells treated with alkali cations. J Bacteriol. 1983 Jan;153(1):163–168. doi: 10.1128/jb.153.1.163-168.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Jenkins J. R., Ayton P., Jones T., Davies S. L., Simmons D. L., Harris A. L., Sheer D., Hickson I. D. Isolation of cDNA clones encoding the beta isozyme of human DNA topoisomerase II and localisation of the gene to chromosome 3p24. Nucleic Acids Res. 1992 Nov 11;20(21):5587–5592. doi: 10.1093/nar/20.21.5587. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Kim R. A., Wang J. C. A subthreshold level of DNA topoisomerases leads to the excision of yeast rDNA as extrachromosomal rings. Cell. 1989 Jun 16;57(6):975–985. doi: 10.1016/0092-8674(89)90336-x. [DOI] [PubMed] [Google Scholar]
  19. Kim R. A., Wang J. C. Function of DNA topoisomerases as replication swivels in Saccharomyces cerevisiae. J Mol Biol. 1989 Jul 20;208(2):257–267. doi: 10.1016/0022-2836(89)90387-2. [DOI] [PubMed] [Google Scholar]
  20. Landschulz W. H., Johnson P. F., McKnight S. L. The leucine zipper: a hypothetical structure common to a new class of DNA binding proteins. Science. 1988 Jun 24;240(4860):1759–1764. doi: 10.1126/science.3289117. [DOI] [PubMed] [Google Scholar]
  21. Nomoto S., Nakayama N., Arai K., Matsumoto K. Regulation of the yeast pheromone response pathway by G protein subunits. EMBO J. 1990 Mar;9(3):691–696. doi: 10.1002/j.1460-2075.1990.tb08161.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Saiki R. K., Scharf S., Faloona F., Mullis K. B., Horn G. T., Erlich H. A., Arnheim N. Enzymatic amplification of beta-globin genomic sequences and restriction site analysis for diagnosis of sickle cell anemia. Science. 1985 Dec 20;230(4732):1350–1354. doi: 10.1126/science.2999980. [DOI] [PubMed] [Google Scholar]
  23. Sanger F., Nicklen S., Coulson A. R. DNA sequencing with chain-terminating inhibitors. Proc Natl Acad Sci U S A. 1977 Dec;74(12):5463–5467. doi: 10.1073/pnas.74.12.5463. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Sikorski R. S., Boeke J. D. In vitro mutagenesis and plasmid shuffling: from cloned gene to mutant yeast. Methods Enzymol. 1991;194:302–318. doi: 10.1016/0076-6879(91)94023-6. [DOI] [PubMed] [Google Scholar]
  25. Sikorski R. S., Hieter P. A system of shuttle vectors and yeast host strains designed for efficient manipulation of DNA in Saccharomyces cerevisiae. Genetics. 1989 May;122(1):19–27. doi: 10.1093/genetics/122.1.19. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. St John T. P., Davis R. W. The organization and transcription of the galactose gene cluster of Saccharomyces. J Mol Biol. 1981 Oct 25;152(2):285–315. doi: 10.1016/0022-2836(81)90244-8. [DOI] [PubMed] [Google Scholar]
  27. Struhl K., Stinchcomb D. T., Scherer S., Davis R. W. High-frequency transformation of yeast: autonomous replication of hybrid DNA molecules. Proc Natl Acad Sci U S A. 1979 Mar;76(3):1035–1039. doi: 10.1073/pnas.76.3.1035. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Thomas W., Spell R. M., Ming M. E., Holm C. Genetic analysis of the gyrase A-like domain of DNA topoisomerase II of Saccharomyces cerevisiae. Genetics. 1991 Aug;128(4):703–716. doi: 10.1093/genetics/128.4.703. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Tsai-Pflugfelder M., Liu L. F., Liu A. A., Tewey K. M., Whang-Peng J., Knutsen T., Huebner K., Croce C. M., Wang J. C. Cloning and sequencing of cDNA encoding human DNA topoisomerase II and localization of the gene to chromosome region 17q21-22. Proc Natl Acad Sci U S A. 1988 Oct;85(19):7177–7181. doi: 10.1073/pnas.85.19.7177. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Uemura T., Morikawa K., Yanagida M. The nucleotide sequence of the fission yeast DNA topoisomerase II gene: structural and functional relationships to other DNA topoisomerases. EMBO J. 1986 Sep;5(9):2355–2361. doi: 10.1002/j.1460-2075.1986.tb04504.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Uemura T., Ohkura H., Adachi Y., Morino K., Shiozaki K., Yanagida M. DNA topoisomerase II is required for condensation and separation of mitotic chromosomes in S. pombe. Cell. 1987 Sep 11;50(6):917–925. doi: 10.1016/0092-8674(87)90518-6. [DOI] [PubMed] [Google Scholar]
  32. Uemura T., Tanagida M. Mitotic spindle pulls but fails to separate chromosomes in type II DNA topoisomerase mutants: uncoordinated mitosis. EMBO J. 1986 May;5(5):1003–1010. doi: 10.1002/j.1460-2075.1986.tb04315.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Uemura T., Yanagida M. Isolation of type I and II DNA topoisomerase mutants from fission yeast: single and double mutants show different phenotypes in cell growth and chromatin organization. EMBO J. 1984 Aug;3(8):1737–1744. doi: 10.1002/j.1460-2075.1984.tb02040.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. Wang J. C. DNA topoisomerases. Annu Rev Biochem. 1985;54:665–697. doi: 10.1146/annurev.bi.54.070185.003313. [DOI] [PubMed] [Google Scholar]

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