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. 1995 Sep;15(9):4890–4897. doi: 10.1128/mcb.15.9.4890

A heat shock transcription factor with reduced activity suppresses a yeast HSP70 mutant.

J T Halladay 1, E A Craig 1
PMCID: PMC230735  PMID: 7651408

Abstract

Strains carrying deletions in both the SSA1 and SSA2 HSP70 genes of Saccharomyces cerevisiae exhibit pleiotropic phenotypes, including the inability to grow at 37 degrees C or higher, reduced growth rate at permissive temperatures, increased HSP gene expression, and constitutive thermotolerance. A screen for extragenic suppressors of the ssa1 ssa2 slow-growth phenotype identified a spontaneous dominant suppressor mutation, EXA3-1 (R.J. Nelson, M. Heschl, and E.A. Craig, Genetics 131:277-285, 1992). Here we report that EXA3-1 is an allele of HSF1, which encodes the heat shock transcription factor (HSF). Strains containing the EXA3-1 allele in a wild-type background exhibit a 10- to 15-fold reduction in HSF activity during steady-state growth conditions as well as a delay in the accumulation of the SSA4, HSP26, and HSP104 mRNAs after a heat shock. EXA3-1-mediated suppression is the result of a single amino acid substitution of a highly conserved residue in the HSF DNA-binding domain which drastically reduces the ability of HSF to bind to heat shock elements as evaluated by band shift analysis. Together, these results indicate that the poor growth of ssa1 ssa2 strains is the result, at least in part, of the overproduction of a deleterious heat shock protein(s). This conclusion is supported by the fact that the levels of at least some heat shock proteins are reduced in ssa1 ssa2 cells containing the EXA3-1 allele. Surprisingly, strains containing the EXA3-1 allele in a wild-type HSP70 background grow early as well as the wild-type strain over a wide temperature range, displaying only a slight reduction in growth rate at 37 degrees Celsius, indicating that cells contain significantly more HSF activity than is require for growth under steady-state conditions.

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Selected References

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  1. Amin J., Ananthan J., Voellmy R. Key features of heat shock regulatory elements. Mol Cell Biol. 1988 Sep;8(9):3761–3769. doi: 10.1128/mcb.8.9.3761. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Becker J., Craig E. A. Heat-shock proteins as molecular chaperones. Eur J Biochem. 1994 Jan 15;219(1-2):11–23. doi: 10.1007/978-3-642-79502-2_2. [DOI] [PubMed] [Google Scholar]
  3. Boorstein W. R., Craig E. A. Structure and regulation of the SSA4 HSP70 gene of Saccharomyces cerevisiae. J Biol Chem. 1990 Nov 5;265(31):18912–18921. [PubMed] [Google Scholar]
  4. Bradford M. M. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Anal Biochem. 1976 May 7;72:248–254. doi: 10.1006/abio.1976.9999. [DOI] [PubMed] [Google Scholar]
  5. Bukau B., Walker G. C. Mutations altering heat shock specific subunit of RNA polymerase suppress major cellular defects of E. coli mutants lacking the DnaK chaperone. EMBO J. 1990 Dec;9(12):4027–4036. doi: 10.1002/j.1460-2075.1990.tb07624.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Craig E. A., Gambill B. D., Nelson R. J. Heat shock proteins: molecular chaperones of protein biogenesis. Microbiol Rev. 1993 Jun;57(2):402–414. doi: 10.1128/mr.57.2.402-414.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Craig E. A., Jacobsen K. Mutations of the heat inducible 70 kilodalton genes of yeast confer temperature sensitive growth. Cell. 1984 Oct;38(3):841–849. doi: 10.1016/0092-8674(84)90279-4. [DOI] [PubMed] [Google Scholar]
  8. Gamer J., Bujard H., Bukau B. Physical interaction between heat shock proteins DnaK, DnaJ, and GrpE and the bacterial heat shock transcription factor sigma 32. Cell. 1992 May 29;69(5):833–842. doi: 10.1016/0092-8674(92)90294-m. [DOI] [PubMed] [Google Scholar]
  9. Georgopoulos C., Welch W. J. Role of the major heat shock proteins as molecular chaperones. Annu Rev Cell Biol. 1993;9:601–634. doi: 10.1146/annurev.cb.09.110193.003125. [DOI] [PubMed] [Google Scholar]
  10. Harrison C. J., Bohm A. A., Nelson H. C. Crystal structure of the DNA binding domain of the heat shock transcription factor. Science. 1994 Jan 14;263(5144):224–227. doi: 10.1126/science.8284672. [DOI] [PubMed] [Google Scholar]
  11. Ingolia T. D., Slater M. R., Craig E. A. Saccharomyces cerevisiae contains a complex multigene family related to the major heat shock-inducible gene of Drosophila. Mol Cell Biol. 1982 Nov;2(11):1388–1398. doi: 10.1128/mcb.2.11.1388. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Kingston R. E., Schuetz T. J., Larin Z. Heat-inducible human factor that binds to a human hsp70 promoter. Mol Cell Biol. 1987 Apr;7(4):1530–1534. doi: 10.1128/mcb.7.4.1530. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Lindquist S., Craig E. A. The heat-shock proteins. Annu Rev Genet. 1988;22:631–677. doi: 10.1146/annurev.ge.22.120188.003215. [DOI] [PubMed] [Google Scholar]
  14. Mukai H., Kuno T., Tanaka H., Hirata D., Miyakawa T., Tanaka C. Isolation and characterization of SSE1 and SSE2, new members of the yeast HSP70 multigene family. Gene. 1993 Sep 30;132(1):57–66. doi: 10.1016/0378-1119(93)90514-4. [DOI] [PubMed] [Google Scholar]
  15. Nelson R. J., Heschl M. F., Craig E. A. Isolation and characterization of extragenic suppressors of mutations in the SSA hsp70 genes of Saccharomyces cerevisiae. Genetics. 1992 Jun;131(2):277–285. doi: 10.1093/genetics/131.2.277. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Nieto-Sotelo J., Wiederrecht G., Okuda A., Parker C. S. The yeast heat shock transcription factor contains a transcriptional activation domain whose activity is repressed under nonshock conditions. Cell. 1990 Aug 24;62(4):807–817. doi: 10.1016/0092-8674(90)90124-w. [DOI] [PubMed] [Google Scholar]
  17. Park H. O., Craig E. A. Positive and negative regulation of basal expression of a yeast HSP70 gene. Mol Cell Biol. 1989 May;9(5):2025–2033. doi: 10.1128/mcb.9.5.2025. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Parker C. S., Topol J. A Drosophila RNA polymerase II transcription factor binds to the regulatory site of an hsp 70 gene. Cell. 1984 May;37(1):273–283. doi: 10.1016/0092-8674(84)90323-4. [DOI] [PubMed] [Google Scholar]
  19. Perisic O., Xiao H., Lis J. T. Stable binding of Drosophila heat shock factor to head-to-head and tail-to-tail repeats of a conserved 5 bp recognition unit. Cell. 1989 Dec 1;59(5):797–806. doi: 10.1016/0092-8674(89)90603-x. [DOI] [PubMed] [Google Scholar]
  20. Rose M. D., Misra L. M., Vogel J. P. KAR2, a karyogamy gene, is the yeast homolog of the mammalian BiP/GRP78 gene. Cell. 1989 Jun 30;57(7):1211–1221. doi: 10.1016/0092-8674(89)90058-5. [DOI] [PubMed] [Google Scholar]
  21. Schmitt M. E., Brown T. A., Trumpower B. L. A rapid and simple method for preparation of RNA from Saccharomyces cerevisiae. Nucleic Acids Res. 1990 May 25;18(10):3091–3092. doi: 10.1093/nar/18.10.3091. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Shirayama M., Kawakami K., Matsui Y., Tanaka K., Toh-e A. MSI3, a multicopy suppressor of mutants hyperactivated in the RAS-cAMP pathway, encodes a novel HSP70 protein of Saccharomyces cerevisiae. Mol Gen Genet. 1993 Sep;240(3):323–332. doi: 10.1007/BF00280382. [DOI] [PubMed] [Google Scholar]
  23. Slater M. R., Craig E. A. Transcriptional regulation of an hsp70 heat shock gene in the yeast Saccharomyces cerevisiae. Mol Cell Biol. 1987 May;7(5):1906–1916. doi: 10.1128/mcb.7.5.1906. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Sorger P. K., Lewis M. J., Pelham H. R. Heat shock factor is regulated differently in yeast and HeLa cells. Nature. 1987 Sep 3;329(6134):81–84. doi: 10.1038/329081a0. [DOI] [PubMed] [Google Scholar]
  25. Sorger P. K., Nelson H. C. Trimerization of a yeast transcriptional activator via a coiled-coil motif. Cell. 1989 Dec 1;59(5):807–813. doi: 10.1016/0092-8674(89)90604-1. [DOI] [PubMed] [Google Scholar]
  26. Sorger P. K., Pelham H. R. Purification and characterization of a heat-shock element binding protein from yeast. EMBO J. 1987 Oct;6(10):3035–3041. doi: 10.1002/j.1460-2075.1987.tb02609.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. Sorger P. K., Pelham H. R. Yeast heat shock factor is an essential DNA-binding protein that exhibits temperature-dependent phosphorylation. Cell. 1988 Sep 9;54(6):855–864. doi: 10.1016/s0092-8674(88)91219-6. [DOI] [PubMed] [Google Scholar]
  28. Sorger P. K. Yeast heat shock factor contains separable transient and sustained response transcriptional activators. Cell. 1990 Aug 24;62(4):793–805. doi: 10.1016/0092-8674(90)90123-v. [DOI] [PubMed] [Google Scholar]
  29. Stone D. E., Craig E. A. Self-regulation of 70-kilodalton heat shock proteins in Saccharomyces cerevisiae. Mol Cell Biol. 1990 Apr;10(4):1622–1632. doi: 10.1128/mcb.10.4.1622. [DOI] [PMC free article] [PubMed] [Google Scholar]
  30. Straus D., Walter W., Gross C. A. DnaK, DnaJ, and GrpE heat shock proteins negatively regulate heat shock gene expression by controlling the synthesis and stability of sigma 32. Genes Dev. 1990 Dec;4(12A):2202–2209. doi: 10.1101/gad.4.12a.2202. [DOI] [PubMed] [Google Scholar]
  31. Tilly K., McKittrick N., Zylicz M., Georgopoulos C. The dnaK protein modulates the heat-shock response of Escherichia coli. Cell. 1983 Sep;34(2):641–646. doi: 10.1016/0092-8674(83)90396-3. [DOI] [PubMed] [Google Scholar]
  32. Werner-Washburne M., Stone D. E., Craig E. A. Complex interactions among members of an essential subfamily of hsp70 genes in Saccharomyces cerevisiae. Mol Cell Biol. 1987 Jul;7(7):2568–2577. doi: 10.1128/mcb.7.7.2568. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Wiederrecht G., Seto D., Parker C. S. Isolation of the gene encoding the S. cerevisiae heat shock transcription factor. Cell. 1988 Sep 9;54(6):841–853. doi: 10.1016/s0092-8674(88)91197-x. [DOI] [PubMed] [Google Scholar]
  34. Wiederrecht G., Shuey D. J., Kibbe W. A., Parker C. S. The Saccharomyces and Drosophila heat shock transcription factors are identical in size and DNA binding properties. Cell. 1987 Feb 13;48(3):507–515. doi: 10.1016/0092-8674(87)90201-7. [DOI] [PubMed] [Google Scholar]
  35. Wu C. Two protein-binding sites in chromatin implicated in the activation of heat-shock genes. Nature. 1984 May 17;309(5965):229–234. doi: 10.1038/309229a0. [DOI] [PubMed] [Google Scholar]
  36. Young M. R., Craig E. A. Saccharomyces cerevisiae HSP70 heat shock elements are functionally distinct. Mol Cell Biol. 1993 Sep;13(9):5637–5646. doi: 10.1128/mcb.13.9.5637. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Zimarino V., Wu C. Induction of sequence-specific binding of Drosophila heat shock activator protein without protein synthesis. 1987 Jun 25-Jul 1Nature. 327(6124):727–730. doi: 10.1038/327727a0. [DOI] [PubMed] [Google Scholar]

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