Cited by 48Mitochondrial Function and PathologyFungal and yeast genetics researchAutophagy in Disease and Therapy

The metabolic growth limitations of petite cells lacking the mitochondrial genome

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Vowinckel, Jakob, Hartl, Johannes, Marx, Hans, Kerick, Martin, Runggatscher, Kathrin, Keller, Markus A., Mülleder, Michael, Day, Jason +12 more·2021·Nature Metabolism

Abstract

Eukaryotic cells can survive the loss of their mitochondrial genome, but consequently suffer from severe growth defects. 'Petite yeasts', characterized by mitochondrial genome loss, are instrumental for studying mitochondrial function and physiology. However, the molecular cause of their reduced growth rate remains an open question. Here we show that petite cells suffer from an insufficient capacity to synthesize glutamate, glutamine, leucine and arginine, negatively impacting their growth. Using a combination of molecular genetics and omics approaches, we demonstrate the evolution of fast growth overcomes these amino acid deficiencies, by alleviating a perturbation in mitochondrial iron metabolism and by restoring a defect in the mitochondrial tricarboxylic acid cycle, caused by aconitase inhibition. Our results hence explain the slow growth of mitochondrial genome-deficient cells with a partial auxotrophy in four amino acids that results from distorted iron metabolism and an inhibited tricarboxylic acid cycle.

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Crossref · 10.1038/s42255-021-00477-6

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  • Petite mutants of S. cerevisiae exhibit deficiencies in leucine, arginine, glutamate, and glutamine but not in amino acids derived from the reductive part of the TCA cycle, such as aspartate.

    “petite mutants of S. cerevisiae exhibit deficiencies in leucine, arginine, glutamate, and glutamine but not in amino acids derived from the reductive part of the TCA cycle, such as aspartate (10).”

    From Overlooked <i>Candida glabrata</i> petites are echinocandin tolerant, induce host inflammatory responses, and display poor <i>in vivo</i> fitness (2023) · cites this paper as [10]

    The Introduction and Discussion say that petite cells have insufficient biosynthetic capacity for leucine, arginine, glutamate and glutamine. The passages from the Results on amino-acid supply and TCA-cycle inhibition do not establish the claimed contrast with amino acids derived from the reductive part of the TCA cycle, such as aspartate; a search for aspartate found no such finding in our copy. Page numbers were not available for these passages. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Petites are not considered an end-stage phenotype, as they can convert to mitochondrial proficient cells under certain in vitro and in-host conditions.

    “petites are not considered an end-stage phenotype, as they can convert to mitochondrial proficient cells under certain in vitro (10) and in-host (38) conditions.”

    From Overlooked <i>Candida glabrata</i> petites are echinocandin tolerant, induce host inflammatory responses, and display poor <i>in vivo</i> fitness (2023) · cites this paper as [10]

    The Introduction and Results describe petite cells adapting in vitro to grow nearly as fast as wild type, supporting the idea that the slow-growth phenotype is not fixed. But the adapted cells remain without mitochondrial DNA; the paper does not show them converting to mitochondrially proficient cells. The in-host condition is cited to a different source (38), not this paper (10). (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Mitochondrial pathways are important for amino acid production.

    “given the importance of mitochondrial pathways for amino acid production (10, 18).”

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Research works printed but not linked: 1

  1. [105]Kahm M Hasenbrink G Lichtenberg-Fraté H Ludwig J Kschischo M grofit: Fitting Biological Growth Curves with R Journal of Statistical Software, Articles 2010 33 1 21

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Authors
Vowinckel, J., Hartl, J., Marx, H., Kerick, M., Runggatscher, K., Keller, M. A., Mülleder, M., Day, J., Weber, M., Rinnerthaler, M., Yu, J. S. L., Aulakh, S. K., Lehmann, A., Mattanovich, D., Timmermann, B., Zhang, N., Dunn, C. D., MacRae, J. I., Breitenbach, M., & Ralser, M.
Affiliations
  • University of Cambridge (GB)
  • BOKU University (AT)
  • Max Planck Institute for Molecular Genetics (DE)
  • Innsbruck Medical University (AT)
  • University of Salzburg (AT)
  • The Francis Crick Institute (GB)
  • Humboldt-Universität zu Berlin (DE)
  • University of Helsinki (FI)
Corresponding author
Ralser, Markus
Venue
Nature Metabolism
Published
2021-11-18
Volume
3
Issue
11
Pages
1521-1535
ISSN
2522-5812 (ISSN-L)
OpenAlex
W3211868415
Cited by
48
References
122
Citations by year
2026: 10 · 2025: 7 · 2024: 7 · 2023: 15 · 2022: 9
FWCI
2.43
Type
journal article
Language
en
Open access
Locations
  • Nature Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
Funders
  • Wellcome Trust (200829, FC001134, 200829/Z/16/Z)
  • Francis Crick Institute (10134, 10012)
  • Cancer Research UK (FC001134)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
growth defects, amino acid synthesis, glutamate, glutamine, leucine, L-arginine, auxotrophy, mitochondrial iron metabolism, TCA cycle, aconitase inhibition
MeSH terms
Amino Acids, Citric Acid Cycle, Energy Metabolism, Fungal Proteins, Mitochondria, Mutation, Phenotype, Structure-Activity Relationship, Yeasts, Biomass, Cell Proliferation, Membrane Potential, Mitochondrial, Genome, Mitochondrial

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