The complete mitochondrial genome of Atelura formicaria (Hexapoda: Zygentoma) and the phylogenetic relationships of basal insects

In this study, the complete sequence of the mitochondrial DNA (mtDNA) of Atelura formicaria (Hexapoda: Zygentoma) is described. The molecule is 15.205 bp in length and it is the third complete mt genome sequenced from the Zygentoma. The genome organization conforms with the putative ancestral insect...

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Bibliographic Details
Published in:Gene 2009-06, Vol.439 (1), p.25-34
Main Authors: Comandi, Sara, Carapelli, Antonio, Podsiadlowski, Lars, Nardi, Francesco, Frati, Francesco
Format: Article
Language:English
Subjects:
A+T-rich region
Animals
Basal hexapods
Base Sequence
DNA, Mitochondrial - genetics
Genes, Insect
Genome, Mitochondrial
Hexapoda
Insecta - genetics
Lepidotrichidae
Lepismatidae
Microcoryphia
Mitochondrial DNA
Molecular Sequence Data
Nucleic Acid Conformation
Phylogeny
Strand bias
Thermobia domestica
Tricholepidion gertschi
Zygentoma
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Summary:In this study, the complete sequence of the mitochondrial DNA (mtDNA) of Atelura formicaria (Hexapoda: Zygentoma) is described. The molecule is 15.205 bp in length and it is the third complete mt genome sequenced from the Zygentoma. The genome organization conforms with the putative ancestral insect gene arrangement. All protein coding genes use standard initiation codons (methionine and isoleucine). The exception is nad4 that starts with GTG, a codon used for this purpose in other insect species. A peculiar strand skew bias is observed, given that the PCGs encoded on the J-strand contain more thymines than adenines and more cytosines than guanines. This trend in nucleotide composition has been observed also in the “firebrat” Thermobia domestica (Zygentoma, Lepismatidae), but differs from that of the majority of hexapod species, including Tricholepidion gertschi (Zygentoma, Lepidotrichidae), where adenines and cytosines outnumber thymines and guanines. The presence of structural elements in the control region is also discussed, with emphasis on their potential implications in the regulation of replication and/or transcription of the mitochondrial genome. A mitogenomic phylogenetic analysis, centered on the internal relationships within Zygentoma and on the position of Microcoryphia and Zygentoma among Ectognatha, is performed.
ISSN:0378-1119
1879-0038
DOI:10.1016/j.gene.2009.02.020