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Complete DNA sequence of the linear mitochondrial genome of the pathogenic yeast Candida parapsilosis

Complete DNA sequence of the linear mitochondrial genome of the pathogenic yeast Candida parapsilosis

Molecular Genetics and Genomics 272(2): 173-180

The complete sequence of the mitochondrial DNA of the opportunistic yeast pathogen Candida parapsilosis was determined. The mitochondrial genome is represented by linear DNA molecules terminating with tandem repeats of a 738-bp unit. The number of repeats varies, thus generating a population of linear DNA molecules that are heterogeneous in size. The length of the shortest molecules is 30,922 bp, whereas the longer molecules have expanded terminal tandem arrays (nx738 bp). The mitochondrial genome is highly compact, with less than 8% of the sequence corresponding to non-coding intergenic spacers. In silico analysis predicted genes encoding fourteen protein subunits of complexes of the respiratory chain and ATP synthase, rRNAs of the large and small subunits of the mitochondrial ribosome, and twenty-four transfer RNAs. These genes are organized into two transcription units. In addition, six intronic ORFs coding for homologues of RNA maturase, reverse transcriptase and DNA endonucleases were identified. In contrast to its overall molecular architecture, the coding sequences of the linear mitochondrial DNA of C. parapsilosis are highly similar to their counterparts in the circular mitochondrial genome of its close relative C. albicans. The complete sequence has implications for both mitochondrial DNA replication and the evolution of linear DNA genomes.

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Accession: 004084265

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PMID: 15449175

DOI: 10.1007/s00438-004-1046-0

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