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. 1966 Oct;41(8):1370–1375. doi: 10.1104/pp.41.8.1370

The Respiratory System of Rhodotorula glutinis II. Mechanism of Inhibitor Tolerant Respiration

Shooichi Matsunaka 1,1, S F Conti 1,2,3,4
PMCID: PMC550533  PMID: 6009626

Abstract

The mechanism of inhibitor-tolerant respiration in Rhodotorula glutinis was studied. This inhibitor-tolerant respiratory pathway was not due to the presence of an excess of cytochrome c oxidase, nor to the operation of an inhibitor-resistant cytochrome c oxidase. Carotenoids do not appear to be involved in this respiratory chain pathway; data are also presented which show that the inhibitors penetrate into the cell. Although the initial rate of oxygen uptake by intact cells was not inhibited in the presence of cyanide or antimycin A, in the presence of these inhibitors the rate of oxygen uptake decreased significantly when the oxygen concentration fell below 100 μm. This change in rate of oxygen uptake as a function of pO2, suggests that a respiratory chain with a low affinity for oxygen operates in the presence of inhibitors. The characteristics of this alternate pathway are described.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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