Organization of the Mitochondrial Genome in the Dinoflagellate Amphidinium carterae | Zendy

Edmund A. Nash | Zendy; Adrian C. Barbrook | Zendy; R. K. Edwards-Stuart | Zendy; Kaj Bernhardt | Zendy; Christopher J. Howe | Zendy; R. Ellen R. Nisbet | Zendy

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Organization of the Mitochondrial Genome in the Dinoflagellate Amphidinium carterae

Author(s) -

Edmund A. Nash,

Adrian C. Barbrook,

R. K. Edwards-Stuart,

Kaj Bernhardt,

Christopher J. Howe,

R. Ellen R. Nisbet

Publication year - 2007

Publication title -

molecular biology and evolution

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 6.637

H-Index - 218

eISSN - 1537-1719

pISSN - 0737-4038

DOI - 10.1093/molbev/msm074

Subject(s) - biology , mitochondrial dna , gene , genetics , genome , transfer rna , dinoflagellate , stop codon , start codon , inverted repeat , direct repeat , codon usage bias , rna , messenger rna , botany

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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