Author： Nash Edmund A. Barbrook Adrian C. Edwards-Stuart Rachel K. Bernhardt Kaj Howe Christopher J. Nisbet R. Ellen R.
Publisher： Oxford University Press
ISSN： 0737-4038
Source： Molecular Biology and Evolution, Vol.24, Iss.7, 2007-07, pp. : 1528-1536
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Abstract
We have characterized the mitochondrial genome of the dinoflagellate Amphidinium carterae. It contains just 3 identifiable protein-coding genes: cox1, cox3, and cob. No evidence for rRNA or tRNA genes was found. Expressed sequence tags (EST) sequences for the 3 genes suggest that RNA editing occurs in 2 cases removing an in-frame stop codon. Two of the transcripts (cob and cox1) lack a stop codon at the end of the gene. The genome contains a large amount of noncoding DNA including many fragmented copies of all the 3 genes and large numbers of inverted repeats. The genome, which contains about 70% AT, has undergone extensive recombination, possibly due to the inverted repeats. The highly reduced mitochondrial gene content supports the relationship of the dinoflagellates and apicomplexa as sister groups.
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