NDLI: Nucleotide Composition of CO1 Sequences in Chelicerata (Arthropoda): Detecting New Mitogenomic Rearrangements

Content Provider	Springer Nature Link
Author	Arabi, Juliette Judson, Mark L. I. Deharveng, Louis Lourenço, Wilson R. Cruaud, Corinne Hassanin, Alexandre
Copyright Year	2012
Abstract	Here we study the evolution of nucleotide composition in third codon-positions of CO1 sequences of Chelicerata, using a phylogenetic framework, based on 180 taxa and three markers (CO1, 18S, and 28S rRNA; 5,218 nt). The analyses of nucleotide composition were also extended to all CO1 sequences of Chelicerata found in GenBank (1,701 taxa). The results show that most species of Chelicerata have a positive strand bias in CO1, i.e., in favor of C nucleotides, including all Amblypygi, Palpigradi, Ricinulei, Solifugae, Uropygi, and Xiphosura. However, several taxa show a negative strand bias, i.e., in favor of G nucleotides: all Scorpiones, Opisthothelae spiders and several taxa within Acari, Opiliones, Pseudoscorpiones, and Pycnogonida. Several reversals of strand-specific bias can be attributed to either a rearrangement of the control region or an inversion of a fragment containing the CO1 gene. Key taxa for which sequencing of complete mitochondrial genomes will be necessary to determine the origin and nature of mtDNA rearrangements involved in the reversals are identified. Acari, Opiliones, Pseudoscorpiones, and Pycnogonida were found to show a strong variability in nucleotide composition. In addition, both mitochondrial and nuclear genomes have been affected by higher substitution rates in Acari and Pseudoscorpiones. The results therefore indicate that these two orders are more liable to fix mutations of all types, including base substitutions, indels, and genomic rearrangements.
Starting Page	81
Ending Page	95
Page Count	15
File Format	PDF
ISSN	00222844
Journal	Journal of Molecular Evolution
Volume Number	74
Issue Number	1-2
e-ISSN	14321432
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-02-24
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chelicerata Mitochondrial genome Strand bias Rearrangements Inversion Control region Phylogeny Evolutionary Biology Microbiology Plant Sciences Cell Biology Animal Genetics and Genomics Plant Genetics & Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Ecology, Evolution, Behavior and Systematics

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