Complete mitochondrial genomes of Trisidos kiyoni and Potiarca pilula: Varied mitochondrial genome size and highly rearranged gene order in Arcidae

We present the complete mitochondrial genomes (mitogenomes) of Trisidos kiyoni and Potiarca pilula , both important species from the family Arcidae (Arcoida: Arcacea). Typical bivalve mtDNA features were described, such as the relatively conserved gene number (36 and 37), a high A + T content (62.73...

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Bibliographic Details
Published in:Scientific reports 2016-09, Vol.6 (1), p.33794-33794, Article 33794
Main Authors: Sun, Shao’e, Li, Qi, Kong, Lingfeng, Yu, Hong
Format: Article
Language:English
Subjects:
38/77
631/181/2474
631/181/735
Codons
Gene order
Gene rearrangement
Genomes
Humanities and Social Sciences
Mitochondria
Mitochondrial DNA
multidisciplinary
Phylogeny
Science
tRNA
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Summary:We present the complete mitochondrial genomes (mitogenomes) of Trisidos kiyoni and Potiarca pilula , both important species from the family Arcidae (Arcoida: Arcacea). Typical bivalve mtDNA features were described, such as the relatively conserved gene number (36 and 37), a high A + T content (62.73% and 61.16%), the preference for A + T-rich codons and the evidence of non-optimal codon usage. The mitogenomes of Arcidae species are exceptional for their extraordinarily large and variable sizes and substantial gene rearrangements. The mitogenome of T. kiyoni (19,614 bp) and P. pilula (28,470 bp) are the two smallest Arcidae mitogenomes. The compact mitogenomes are weakly associated with gene number and primarily reflect shrinkage of the non-coding regions. The varied size in Arcidae mitogenomes reflect a dynamic history of expansion. A significant positive correlation is observed between mitogenome size and the combined length of cox1-3 , the lengths of Cytb and the combined length of rRNAs ( rrnS and rrnL ) ( P  
ISSN:2045-2322
2045-2322
DOI:10.1038/srep33794