Comparative Mitogenomics in <i>Hyalella</i> (Amphipoda: Crustacea)

Show simple item record Zapelloni, F. Jurado-Rivera, J.A. Jaume, D. Juan, C. Pons, J. 2021-03-18T07:57:39Z 2021-03-18T07:57:39Z
dc.description.abstract [eng] We present the sequencing and comparative analysis of 17 mitochondrial genomes of Nearctic and Neotropical amphipods of the genus Hyalella, most from the Andean Altiplano. The mitogenomes obtained comprised the usual 37 gene-set of the metazoan mitochondrial genome showing a gene rearrangement (a reverse transposition and a reversal) between the North and South American Hyalella mitogenomes. Hyalella mitochondrial genomes show the typical AT-richness and strong nucleotide bias among codon sites and strands of pancrustaceans. Protein-coding sequences are biased towards AT-rich codons, with a preference for leucine and serine amino acids. Numerous base changes (539) were found in tRNA stems, with 103 classified as fully compensatory, 253 hemi-compensatory and the remaining base mismatches and indels. Most compensatory Watson-Crick switches were AU -> GC linked in the same haplotype, whereas most hemi-compensatory changes resulted in wobble GU and a few AC pairs. These results suggest a pairing fitness increase in tRNAs after crossing low fitness valleys. Branch-site level models detected positive selection for several amino acid positions in up to eight mitochondrial genes, with atp6 and nad5 as the genes displaying more sites under selection.
dc.format application/pdf
dc.relation.ispartof Genes, 2021, vol. 12, num. 2, p. 292
dc.rights , 2021
dc.subject.classification 57 - Biologia
dc.subject.other 57 - Biological sciences in general
dc.title Comparative Mitogenomics in <i>Hyalella</i> (Amphipoda: Crustacea)
dc.type info:eu-repo/semantics/article 2021-03-18T07:57:39Z
dc.subject.keywords compensatory mutation
dc.subject.keywords tRNA secondary structure
dc.subject.keywords selection
dc.subject.keywords Hyalella
dc.subject.keywords crustaceans
dc.rights.accessRights info:eu-repo/semantics/openAccess

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search Repository

Advanced Search


My Account