Click
here to close Hello! We notice that
you are using Internet Explorer, which is not supported by Echinobase
and may cause the site to display incorrectly. We suggest using a
current version of Chrome,
FireFox,
or Safari.
Planarian mitochondria. II. The unique genetic code as deduced from cytochrome c oxidase subunit I gene sequences.
Bessho Y
,
Ohama T
,
Osawa S
.
???displayArticle.abstract???
The cytochrome c oxidase subunit I (COI) gene sequences from planarian (Dugesia japonica) DNA, most probably of mitochondrial origin, are heterogeneous. Taking advantage of the heterogeneity that occurs primarily in silent sites of the COI DNA sequences, amino acid assignments of several codons have been deduced as nonuniversal: UGA = Trp, AAA = Asp, and AGR (R: A or G) = Ser. In addition, UAA, a stop codon in the universal genetic code, is tentatively assumed to be a tyrosine codon, because three of the sequences examined have UAA at the well-conserved tyrosine site of UAY (Y: U or C) in other planarian sequences as well as in the mitochondria of human, Xenopus, sea urchin, Drosophila, Trypanosoma, and Saccharomyces cerevisiae. AUA would most probably be an isoleucine codon in these mitochondria, whereas it is a methionine codon in the majority of nonplant mitochondria.
Anderson,
Sequence and organization of the human mitochondrial genome.
1981, Pubmed
Anderson,
Sequence and organization of the human mitochondrial genome.
1981,
Pubmed
Bessho,
Planarian mitochondria. I. Heterogeneity of cytochrome c oxidase subunit I gene sequences in the freshwater planarian, Dugesia japonica.
1992,
Pubmed
Bonitz,
Assembly of the mitochondrial membrane system. Structure and nucleotide sequence of the gene coding for subunit 1 of yeast cytochrme oxidase.
1980,
Pubmed
Cantatore,
The complete nucleotide sequence, gene organization, and genetic code of the mitochondrial genome of Paracentrotus lividus.
1989,
Pubmed
,
Echinobase
Cattaneo,
Messenger RNA editing and the genetic code.
1990,
Pubmed
Clary,
The mitochondrial DNA molecular of Drosophila yakuba: nucleotide sequence, gene organization, and genetic code.
1985,
Pubmed
Garey,
Platyhelminth mitochondrial DNA: evidence for early evolutionary origin of a tRNA(serAGN) that contains a dihydrouridine arm replacement loop, and of serine-specifying AGA and AGG codons.
1989,
Pubmed
Hensgens,
The sequence of the gene for cytochrome c oxidase subunit I, a frameshift containing gene for cytochrome c oxidase subunit II and seven unassigned reading frames in Trypanosoma brucei mitochondrial maxi-circle DNA.
1984,
Pubmed
Himeno,
Unusual genetic codes and a novel gene structure for tRNA(AGYSer) in starfish mitochondrial DNA.
1987,
Pubmed
,
Echinobase
Jacobs,
Nucleotide sequence and gene organization of sea urchin mitochondrial DNA.
1988,
Pubmed
,
Echinobase
Jukes,
The genetic code in mitochondria and chloroplasts.
1990,
Pubmed
Ohama,
Evolution of the mitochondrial genetic code. IV. AAA as an asparagine codon in some animal mitochondria.
1990,
Pubmed
Roe,
The complete nucleotide sequence of the Xenopus laevis mitochondrial genome.
1985,
Pubmed
