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J Bacteriol. Sep 1994; 176(18): 5622–5630.
PMCID: PMC196764

NADH dehydrogenase subunit genes in the mitochondrial DNA of yeasts.


The genes encoding the NADH dehydrogenase subunits of respiratory complex I have not been identified so far in the mitochondrial DNA (mtDNA) of yeasts. In the linear mtDNA of Candida parapsilosis, we found six new open reading frames whose sequences were unambiguously homologous to those of the genes known to code for NADH dehydrogenase subunit proteins of different organisms, i.e., ND1, ND2, ND3, ND4L, ND5, and ND6. The gene for ND4 also appears to be present, as judged from hybridization experiments with a Podospora gene probe. Specific transcripts from these open reading frames (ND genes) could be detected in the mitochondria. Hybridization experiments using C. parapsilosis genes as probes suggested that ND genes are present in the mtDNAs of a wide range of yeast species including Candida catenulata, Pichia guilliermondii, Clavispora lusitaniae, Debaryomyces hansenii, Hansenula polymorpha, and others.

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