PMID: 8587138Dec 1, 1995Paper

The sequence, organization, and evolution of the Locusta migratoria mitochondrial genome

Journal of Molecular Evolution
P K FlookG Gellissen

Abstract

The sequencing of the cloned Locusta migratoria mitochondrial genome has been completed. The sequence is 15,722 bp in length and contains 75.3% A+T, the lowest value in any of the five insect mitochondrial sequences so far determined. The protein coding genes have a similar A+T content (74.1%) but are distinguished by a high cytosine content at the third codon position. The gene content and organization are the same as in Drosophila yakuba except for a rearrangement of the two tRNA genes tRNAlys and tRNAasp. The A+T-rich region has a lower A+T nucleotide content than in other insects, and this is largely due to the presence of two G+C-rich 155-bp repetitive sequences at the 5'end of this section and the beginning of the adjacent small rRNA gene. The sizes of the large and small rRNA genes are 1,314 and 827 bp, respectively, and both sequences can be folded to form secondary structures similar to those previously predicted for Drosophila. The tRNA genes have also been modeled and these show a strong resemblance to the dipteran tRNAs, all anticodons apparently being conserved between the two species. A comparison of the protein coding nucleotide sequences of the locust DNA with the homologous sequences of five other arthropods (D...Continue Reading

Citations

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