ECB-ART-43813
Mitochondrial DNA A DNA Mapp Seq Anal
2016 Nov 01;276:4174-4175. doi: 10.3109/19401736.2014.1003899.
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Complete mitochondrial genome of the sandfish Holothuria scabra (Holothuroidea, Holothuriidae).
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The complete mitochondrial genome (mitogenome) sequence of Holothuria scabra, an economically and ecologically important tropical sea cucumber, was first sequenced and annotated. The mitochondrial DNA is 15,779 bp in length and contains 13 protein-coding genes (PCGs), 2 rRNA genes, 22 tRNA genes, and a 456 bp putative control region, of which gene order is identical to the echinoderm ground pattern. Comparative analyses between H. scabra and other holothurians revealed three new findings: (1) the mitogenome of H. scabra is highly compact having five regions with overlapping genes and least intergenic nucleotides among the sequenced holothurians, only accounting for 3.58% of its mitogenome; (2) the genus Holothuria mitogenomes show a pattern of high interspecies divergence at the 13 PCGs, and the genetic p-distance reaches 25.68% between H. scabra and H. forskali; (3) the incomplete stop codon T of cox2 shared with H. forskali may be a common feature in the genus Holothuria.
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Genes referenced: LOC100887844 mt-co2