Abstract
We describe the complete mitochondrial genome of the house centipede Scutigera coleoptrata. Its gene order is unique among characterized arthropod mitochondrial genomes. Comparison to the gene order in the horseshoe crab mtDNA implies 10 or more translocations. By extending comparisons to 30 arthropod mitochondrial genomes plus two outgroups, we identify two different patterns of gene order change. The first, only affecting position and orientation of tRNAs, is much more frequent than the second, which also involves protein encoding and ribosomal genes. The analysis of the same data set using available algorithms for phylogenetic reconstruction based on gene order results in unreliable trees. This indicates that the current methods for analyzing gene order rearrangement are not suitable for wide-ranging phylogenetic studies.
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