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Genetic evidence for the functional redundancy of the calcineurin-and Mpk1-mediated pathways in the regulation of cellular events important for growth inSaccharomyces cerevisiae

Molecular and General Genetics MGG volume 251, pages 211–219 (1996)Cite this article

Abstract

Saccharomyces cerevisiae mutants which exhibit phenotypes (calcium resistance and vanadate sensitivity) similar to those of calcineurin-deficient mutants were isolated. The mutants were classified into four complementation groups (crv1,2,3 and4).crv1 was allelic tocnb1, a mutation in the regulatory subunit of calcineurin. The nucleotide sequences ofCRV2 andCRV3 genes which complemented thecrv2 andcrv3 mutations, respectively, are identical to those ofBCK1/SLK1/SKC1/SSP31 andMPK1/SLT2, respectively, which are both involved in the MAP kinase cascade. A calcineurin-deletion mutation (Δcnb1), which by itself has no detectable effect on growth and morphology, enhanced some phenotypes (slow growth and morphological abnormality) ofcrv2 andcrv3 mutants. These phenotypes ofcrv2 andcrv3 mutants were partially suppressed by Ca2+ or by overproduction of the calcineurin subunits (Cmp2 and Cnb1). Like the calcineurin-deficient mutant,crv2 andcrv3 mutants were defective in recovery from α-factor-induced growth arrest. The defect in recovery of the Δcnb1 mutant was suppressed by overexpression ofMPK1. These results indicated that the calcineurin-mediated and the Mpk1- (Bck1-) mediated signaling pathways act in parallel to regulate functionally redundant cellular events important for growth.

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Affiliations

  1. Department of Fermentation Technology, Faculty of Engineering, Hiroshima University, 739, Higashi-Hiroshima, Japan

    T. Nakamura, T. Ohmoto, D. Hirata, E. Tsuchiya & T. Miyakawa

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  1. T. Nakamura
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  2. T. Ohmoto
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  3. D. Hirata
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  4. E. Tsuchiya
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  5. T. Miyakawa
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Communicated by C. P. Hollenberg

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Nakamura, T., Ohmoto, T., Hirata, D. et al. Genetic evidence for the functional redundancy of the calcineurin-and Mpk1-mediated pathways in the regulation of cellular events important for growth inSaccharomyces cerevisiae . Molec. Gen. Genet. 251, 211–219 (1996). https://doi.org/10.1007/BF02172920

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  • DOI: https://doi.org/10.1007/BF02172920

Key words

  • Saccharomyces cerevisiae
  • Calcineurin
  • MAP kinase cascade
  • Pheromone-induced growth arrest
  • Synthetic effect