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Planarian mitochondria II. The unique genetic code as deduced from cytochrome c oxidase subunit I gene sequences by Yoshitaka Bessho; Takeshi Ohama; Syozo Osawa is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Planarian mitochondria II. The unique genetic code as deduced from cytochrome c oxidase subunit I gene sequences about?

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 ofUAY (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 ofnonplant mitochondria.

Who reads Planarian mitochondria II. The unique genetic code as deduced from cytochrome c oxidase subunit I gene sequences?

Author

Yoshitaka Bessho; Takeshi Ohama; Syozo Osawa

Publisher

Springer; Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC (ISSN 0022-2844)

Published

1992

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)