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. 1970 Oct;104(1):473–481. doi: 10.1128/jb.104.1.473-481.1970

Respiratory Metabolism of a “Petite Negative” Yeast Schizosaccharomyces pombe 972h−1

H Heslot 1,2, A Goffeau 1,2, C Louis 1,2
PMCID: PMC248232  PMID: 4394400

Abstract

The respiratory metabolism of Schizosaccharomyces pombe 972h−, a fission, haplontic, “petite negative” yeast, was studied. Glucose and glycerol are good growth substrates and are oxidized under appropriate conditions. l-Lactate, ethanol, malate, and succinate are oxidized but are poor substrates for growth. d-Lactate and pyruvate are neither oxidized nor used for growth. Limited growth was observed under anaerobic conditions. The addition of 0.3% KNO3 to a rich medium relieves the oxygen requirement. A continuous increase of cell respiration during growth on repressive concentration of glucose was observed, suggesting the presence of glucose repression of respiration. Reduced nicotinamide adenine dinucleotide (NADH), succinate, α-glycerophosphate, and ascorbate plus tetramethyl-p-phenylenediamine are oxidized by a mitochondrial fraction. NADH and succinate oxidations are inhibited by antimycin A and NaCN but not by rotenone, suggesting the absence of the phosphorylation site I and the presence of sites II and III. The effects of several mitochondrial inhibitors on growth and respiration indicate that the requirement of an oxidant for growth is related neither to the functioning of the respiratory electron transport chain nor to the formation of respiratory energy. The previously suggested correlations between the nonviability of vegetative “petites” mutants, the absence of repression of respiration by glucose, and the incapacity to grow under anaerobic conditions are thus not strictly valid for S. pombe.

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Selected References

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