The mitochondrial genome of the oribatid mite Paraleius leontonychus: new insights into tRNA evolution and phylogenetic relationships in acariform mites

Scientific Reports
Sylvia SchäfferGerhard G Thallinger

Abstract

Bilaterian mitochondrial (mt) genomes are circular molecules that typically contain 37 genes. To date, only a single complete mitogenome sequence is available for the species-rich sarcoptiform mite order Oribatida. We sequenced the mitogenome of Paraleius leontonychus, another species of this suborder. It is 14,186 bp long and contains 35 genes, including only 20 tRNAs, lacking tRNA Gly and tRNA Tyr . Re-annotation of the mitogenome of Steganacarus magnus increased the number of mt tRNAs for this species to 12. As typical for acariform mites, many tRNAs are highly truncated in both oribatid species. The total number of tRNAs and the number of tRNAs with a complete cloverleaf-like structure in P. leontonychus, however, clearly exceeds the numbers previously reported for Sarcoptiformes. This indicates, contrary to what has been previously assumed, that reduction of tRNAs is not a general characteristic for sarcoptiform mites. Compared to other Sarcoptiformes, the two oribatid species have the least rearranged mt genome with respect to the pattern observed in Limulus polyphemus, a basal arachnid species. Phylogenetic analysis of the newly sequenced mt genome and previously published data on other acariform mites confirms paraphyly...Continue Reading

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Datasets Mentioned

BETA
LT984407

Methods Mentioned

BETA
in vitro transcription
PCR
chip

Software Mentioned

MUSCLE
MITOS WebServer
MITOS2
TranslatorX
MITOS
CGView
MAFFT
GBlocks
SE
RNAfold

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