Structure and evolution of the mitochondrial genomes of Haematobia irritans and Stomoxys calcitrans: The Muscidae (Diptera : Calyptratae) perspective

Autor(es)

Oliveira, Marcos Tulio ^[1] ; Barau, Joan Grande ^[1] ; Martins Junqueira, Ana Carolina ^[1] ; Feijao, Pedro Cipriano ^[1] ; da Rosa, Aline Coelho ^[1] ; Abreu, Cristina Feix ^[1] ; Azeredo-Espin, Ana Maria L. ^{[1, 2]} ; Lessinger, Ana Claudia ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas UNICAMP, CBMEG, Lab Genet Anim, BR-13083875 Sao Paulo - Brazil

^[2] Univ Estadual Campinas UNICAMP, Inst Biol, Dept Genet & Evolucao, BR-13083875 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Molecular Phylogenetics and Evolution; v. 48, n. 3, p. 850-857, SEP 2008.
• Citações Web of Science: 39

Resumo

We present the first two mitochondrial genomes of Muscidae dipterans for the species Haematobia irritans (the horn fly) and Stomoxys calcitrans (the stable fly). Typical insect mtDNA features are described, such as a high A + T content (79.1% and 78.9%, respectively), the preference for A + T-rich codons, and the evidence of a non-optimal codon usage. The strong A + T enrichment partially masks another nucleotide content bias maintained by A + C mutation pressure in these Muscidae mtDNAs. The analysis of this data provides a model of metazoans tRNA anticodon evolution, based on the selection hypothesis of anticodon versatility. H. irritans mitochondrial genome (16078 bp) is structurally similar to the hypothetical ancestral mitochondrial genome of arthropods and its control region (A + T-rich region in insects) organization is consistent with the structure described for Brachycera dipterans. On the other hand, the mitochondrial genome of S. calcitrans is similar to 2 kb longer (18 kb), characterized by the presence of similar to 550 bp tandem repeats in the control region, and an extra copy of trnI remarkably similar to a duplicated element of blowflies mtDNA. Putative sequence elements, involved in the regulation of transcription and replication of the mtDNA, were reliably identified in S. calcitrans control region despite the 0.8-1.5 kb gap uncovered from this genome. The use of amino acid and nucleotide sequences of concatenated mitochondrial protein-coding genes (PCGs) in phylogenetic reconstructions of Diptera does not support the monophyly of Muscomorpha, as well as the monophyly of Acalyptratae. Within the Calyptratae group, the inclusion of Muscidae (Muscoidea) as a sister group of Calliphoridae (Oestroidea) implies in a potential conflict concerning the monophyly of the superfamily Oestroidea. (C) 2008 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 03/05444-2 - Evolução molecular do genoma mitocondrial da família Calliphoridae (Diptera: Brachycera)
• Beneficiário: Ana Carolina Martins Junqueira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 04/09654-4 - Análise da variabilidade genética e estrutura de populações de Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae) da América do Sul através de marcadores microssatélites e PCR-RFLP do DNA mitocondrial
• Beneficiário: Ana Maria Lima de Azeredo-Espin
• Modalidade de apoio: Auxílio à Pesquisa - Regular