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. 1994 Jun;137(2):381–392. doi: 10.1093/genetics/137.2.381

Overexpression of Yeast Homologs of the Mammalian Checkpoint Gene Rcc1 Suppresses the Class of α-Tubulin Mutations That Arrest with Excess Microtubules

D Kirkpatrick 1, F Solomon 1
PMCID: PMC1205964  PMID: 8070652

Abstract

Microtubules in eukaryotic cells participate in a variety of nuclear and cytoplasmic structures, reflecting functional requirements and cell cycle position. We are studying the cellular regulation of microtubule assembly and organization in the yeast Saccharomyces cerevisiae. We screened for genes that when overexpressed suppress the growth phenotype of conditional mutants in α-tubulin that arrest with excess microtubules at the nonpermissive temperature (class 2 mutations). Here we describe one such suppressing element, called ATS1 (for Alpha Tubulin Suppressor). Overexpression of this gene rescues both the growth and microtubule phenotypes of all class 2 mutations, but not the cold-sensitive mutations that arrest with no microtubules (class 1 mutations). Deletion of ATS1 confers a modest slow growth phenotype which is slightly enhanced in strains containing both a deletion of ATS1 and a class 2 tub1 mutation. The predicted ATS1 protein contains 333 amino acids and has considerable structural homology to the products of both the mammalian mitotic control gene RCC1 and the S. cerevisiae gene SRM1/PRP20. Overexpression of SRM1/PRP20 also suppresses class 2 mutants. The results suggest that this family of genes may participate in regulatory interactions between microtubules and the cell cycle.

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Selected References

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  1. Aebi M., Clark M. W., Vijayraghavan U., Abelson J. A yeast mutant, PRP20, altered in mRNA metabolism and maintenance of the nuclear structure, is defective in a gene homologous to the human gene RCC1 which is involved in the control of chromosome condensation. Mol Gen Genet. 1990 Oct;224(1):72–80. doi: 10.1007/BF00259453. [DOI] [PubMed] [Google Scholar]
  2. Belhumeur P., Lee A., Tam R., DiPaolo T., Fortin N., Clark M. W. GSP1 and GSP2, genetic suppressors of the prp20-1 mutant in Saccharomyces cerevisiae: GTP-binding proteins involved in the maintenance of nuclear organization. Mol Cell Biol. 1993 Apr;13(4):2152–2161. doi: 10.1128/mcb.13.4.2152. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Bischoff F. R., Ponstingl H. Mitotic regulator protein RCC1 is complexed with a nuclear ras-related polypeptide. Proc Natl Acad Sci U S A. 1991 Dec 1;88(23):10830–10834. doi: 10.1073/pnas.88.23.10830. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Clark K. L., Ohtsubo M., Nishimoto T., Goebl M., Sprague G. F., Jr The yeast SRM1 protein and human RCC1 protein share analogous functions. Cell Regul. 1991 Oct;2(10):781–792. doi: 10.1091/mbc.2.10.781. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Clark K. L., Sprague G. F., Jr Yeast pheromone response pathway: characterization of a suppressor that restores mating to receptorless mutants. Mol Cell Biol. 1989 Jun;9(6):2682–2694. doi: 10.1128/mcb.9.6.2682. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Clark M. W., Zhong W. W., Keng T., Storms R. K., Barton A., Kaback D. B., Bussey H. Identification of a Saccharomyces cerevisiae homolog of the SNF2 transcriptional regulator in the DNA sequence of an 8.6 kb region in the LTE1-CYS1 interval on the left arm of chromosome I. Yeast. 1992 Feb;8(2):133–145. doi: 10.1002/yea.320080208. [DOI] [PubMed] [Google Scholar]
  7. Dasso M., Nishitani H., Kornbluth S., Nishimoto T., Newport J. W. RCC1, a regulator of mitosis, is essential for DNA replication. Mol Cell Biol. 1992 Aug;12(8):3337–3345. doi: 10.1128/mcb.12.8.3337. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Epstein H., Scholey J. M. Kinesins in the spindle: an update. Trends Cell Biol. 1992 Nov;2(11):315–318. doi: 10.1016/0962-8924(92)90171-i. [DOI] [PubMed] [Google Scholar]
  9. Fleischmann M., Clark M. W., Forrester W., Wickens M., Nishimoto T., Aebi M. Analysis of yeast prp20 mutations and functional complementation by the human homologue RCC1, a protein involved in the control of chromosome condensation. Mol Gen Genet. 1991 Jul;227(3):417–423. doi: 10.1007/BF00273932. [DOI] [PubMed] [Google Scholar]
  10. Frasch M. The maternally expressed Drosophila gene encoding the chromatin-binding protein BJ1 is a homolog of the vertebrate gene Regulator of Chromatin Condensation, RCC1. EMBO J. 1991 May;10(5):1225–1236. doi: 10.1002/j.1460-2075.1991.tb08064.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Guarente L., Yocum R. R., Gifford P. A GAL10-CYC1 hybrid yeast promoter identifies the GAL4 regulatory region as an upstream site. Proc Natl Acad Sci U S A. 1982 Dec;79(23):7410–7414. doi: 10.1073/pnas.79.23.7410. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Hartwell L. H., Weinert T. A. Checkpoints: controls that ensure the order of cell cycle events. Science. 1989 Nov 3;246(4930):629–634. doi: 10.1126/science.2683079. [DOI] [PubMed] [Google Scholar]
  13. Hoyt M. A., Totis L., Roberts B. T. S. cerevisiae genes required for cell cycle arrest in response to loss of microtubule function. Cell. 1991 Aug 9;66(3):507–517. doi: 10.1016/0092-8674(81)90014-3. [DOI] [PubMed] [Google Scholar]
  14. Huffaker T. C., Thomas J. H., Botstein D. Diverse effects of beta-tubulin mutations on microtubule formation and function. J Cell Biol. 1988 Jun;106(6):1997–2010. doi: 10.1083/jcb.106.6.1997. [DOI] [PMC free article] [PubMed] [Google Scholar]
  15. 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]
  16. Katz W. S., Solomon F. Diversity among beta-tubulins: a carboxy-terminal domain of yeast beta-tubulin is not essential in vivo. Mol Cell Biol. 1988 Jul;8(7):2730–2736. doi: 10.1128/mcb.8.7.2730. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Lee G., Cowan N., Kirschner M. The primary structure and heterogeneity of tau protein from mouse brain. Science. 1988 Jan 15;239(4837):285–288. doi: 10.1126/science.3122323. [DOI] [PubMed] [Google Scholar]
  18. Lewis S. A., Wang D. H., Cowan N. J. Microtubule-associated protein MAP2 shares a microtubule binding motif with tau protein. Science. 1988 Nov 11;242(4880):936–939. doi: 10.1126/science.3142041. [DOI] [PubMed] [Google Scholar]
  19. Matsumoto T., Beach D. Premature initiation of mitosis in yeast lacking RCC1 or an interacting GTPase. Cell. 1991 Jul 26;66(2):347–360. doi: 10.1016/0092-8674(91)90624-8. [DOI] [PubMed] [Google Scholar]
  20. Matsumoto T., Beach D. The spil GTPase interacts with RCCl in cell cycle dependency. Cold Spring Harb Symp Quant Biol. 1991;56:385–398. doi: 10.1101/sqb.1991.056.01.046. [DOI] [PubMed] [Google Scholar]
  21. Meeks-Wagner D., Wood J. S., Garvik B., Hartwell L. H. Isolation of two genes that affect mitotic chromosome transmission in S. cerevisiae. Cell. 1986 Jan 17;44(1):53–63. doi: 10.1016/0092-8674(86)90484-8. [DOI] [PubMed] [Google Scholar]
  22. Meluh P. B., Rose M. D. KAR3, a kinesin-related gene required for yeast nuclear fusion. Cell. 1990 Mar 23;60(6):1029–1041. doi: 10.1016/0092-8674(90)90351-e. [DOI] [PubMed] [Google Scholar]
  23. Moore M. S., Blobel G. The GTP-binding protein Ran/TC4 is required for protein import into the nucleus. Nature. 1993 Oct 14;365(6447):661–663. doi: 10.1038/365661a0. [DOI] [PubMed] [Google Scholar]
  24. Murray A. W. Creative blocks: cell-cycle checkpoints and feedback controls. Nature. 1992 Oct 15;359(6396):599–604. doi: 10.1038/359599a0. [DOI] [PubMed] [Google Scholar]
  25. Nishimoto T., Uzawa S., Schlegel R. Mitotic checkpoints. Curr Opin Cell Biol. 1992 Apr;4(2):174–179. doi: 10.1016/0955-0674(92)90029-c. [DOI] [PubMed] [Google Scholar]
  26. Nishitani H., Kobayashi H., Ohtsubo M., Nishimoto T. Cloning of Xenopus RCC1 cDNA, a homolog of the human RCC1 gene: complementation of tsBN2 mutation and identification of the product. J Biochem. 1990 Feb;107(2):228–235. doi: 10.1093/oxfordjournals.jbchem.a123031. [DOI] [PubMed] [Google Scholar]
  27. Noble M., Lewis S. A., Cowan N. J. The microtubule binding domain of microtubule-associated protein MAP1B contains a repeated sequence motif unrelated to that of MAP2 and tau. J Cell Biol. 1989 Dec;109(6 Pt 2):3367–3376. doi: 10.1083/jcb.109.6.3367. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Ohtsubo M., Kai R., Furuno N., Sekiguchi T., Sekiguchi M., Hayashida H., Kuma K., Miyata T., Fukushige S., Murotsu T. Isolation and characterization of the active cDNA of the human cell cycle gene (RCC1) involved in the regulation of onset of chromosome condensation. Genes Dev. 1987 Aug;1(6):585–593. doi: 10.1101/gad.1.6.585. [DOI] [PubMed] [Google Scholar]
  29. Ouellette B. F., Clark M. W., Keng T., Storms R. K., Zhong W., Zeng B., Fortin N., Delaney S., Barton A., Kaback D. B. Sequencing of chromosome I from Saccharomyces cerevisiae: analysis of a 32 kb region between the LTE1 and SPO7 genes. Genome. 1993 Feb;36(1):32–42. doi: 10.1139/g93-005. [DOI] [PubMed] [Google Scholar]
  30. Rose M. D., Novick P., Thomas J. H., Botstein D., Fink G. R. A Saccharomyces cerevisiae genomic plasmid bank based on a centromere-containing shuttle vector. Gene. 1987;60(2-3):237–243. doi: 10.1016/0378-1119(87)90232-0. [DOI] [PubMed] [Google Scholar]
  31. Schatz P. J., Solomon F., Botstein D. Genetically essential and nonessential alpha-tubulin genes specify functionally interchangeable proteins. Mol Cell Biol. 1986 Nov;6(11):3722–3733. doi: 10.1128/mcb.6.11.3722. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Stearns T., Botstein D. Unlinked noncomplementation: isolation of new conditional-lethal mutations in each of the tubulin genes of Saccharomyces cerevisiae. Genetics. 1988 Jun;119(2):249–260. doi: 10.1093/genetics/119.2.249. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Winey M., Goetsch L., Baum P., Byers B. MPS1 and MPS2: novel yeast genes defining distinct steps of spindle pole body duplication. J Cell Biol. 1991 Aug;114(4):745–754. doi: 10.1083/jcb.114.4.745. [DOI] [PMC free article] [PubMed] [Google Scholar]

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