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The complete mitochondrial genome of Calicogorgia granulosa (Anthozoa: Octocorallia): Potential gene novelty in unidentified ORFs formed by repeat expansion and segmental duplication

Title
The complete mitochondrial genome of Calicogorgia granulosa (Anthozoa: Octocorallia): Potential gene novelty in unidentified ORFs formed by repeat expansion and segmental duplication
Authors
Park E.Song J.-I.Won Y.-J.
Ewha Authors
송준임원용진
SCOPUS Author ID
송준임scopus; 원용진scopus
Issue Date
2011
Journal Title
Gene
ISSN
0378-1119JCR Link
Citation
vol. 486, no. 41276, pp. 81 - 87
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Mitochondrial genomes of many nonbilaterian animals show high diversity of genome size and gene content, revealing many intergenic regions (IGRs), diverse repeats and additional genes. Here we present a new complete mitogenome of the cnidarian sea fan species, Calicogorgia granulosa (Anthozoa: Octocorallia) and its novel genomic features. The 20,246. bp of the complete mitogenome, which is the largest among the nine octocorals sequenced to date, contains 13 protein coding genes, 2 rRNAs and a tRNA within its circular form of mitochondrial DNA. We found an identical segmental duplication (S1 and S2, 913. bp) composed of an ORF (672. bp) coding for a hypothetical protein within which Direct Variant Repeat (DVR) expansions reside in-frame to the coding sequence. Additionally, the duplicated segmental DNA showed no variation in nucleotide sequences both between S1 and S2 and across multiple individual samples. Upon these observations, we discuss plausible causes for the intramitochondrial segmental duplication and the absence of sequence variation, and a need for further investigation of the novel ORF as well. In conclusion the present mitogenome of C. granulosa adds more information to our understanding of the diversity and evolution of mitogenomes of nonbilaterian animals. © 2011 Elsevier B.V.
DOI
10.1016/j.gene.2011.07.003
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자연과학대학 > 생명과학전공 > Journal papers
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