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Molecular Biology and Evolution, Vol 3, 19-28, Copyright © 1986 by Society for Molecular Biology and Evolution

ORIGINAL ARTICLE

Conservation of a long open reading frame in two Neurospora mitochondrial plasmids

FE Nargang
Department of Genetics, University of Alberta, Edmonton.

The nucleotide sequence of a specific region of the mitochondrial plasmid from the Neurospora intermedia Varkud-lc strain was determined. Analysis of the sequence revealed the presence of a long (up to 710 amino acids) ORF. This ORF is almost identical to a previously characterized ORF in the mitochondrial plasmid from the Neurospora crassa Mauriceville-lc strain. When the ORFs from the two plasmids are compared over their entire length of 2,133 bp, only 34 nucleotide substitutions are found (greater than 98% identity). These substitutions result in only nine amino acid replacements in the protein sequences predicted from the two ORFs. Though no function can be assigned to the putative products of these ORFs, their high conservation of nucleotide and deduced amino acid sequence suggest that they are under selective pressure, presumably to preserve the function of some protein.
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This article has been cited by other articles:


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M. F. P. M. Maas, R. F. Hoekstra, and A. J. M. Debets
Hybrid Mitochondrial Plasmids From Senescence Suppressor Isolates of Neurospora intermedia
Genetics, February 1, 2007; 175(2): 785 - 794.
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