AI Article Synopsis
- The study investigates the mitochondrial genome of gryphaeid oysters, revealing a complete mtDNA sequence of 30,385 bp with 12 protein-coding genes, 26 tRNA genes, and 2 rRNA genes.
- Unique features include specific gene duplications and rearrangements that differ from true oysters, suggesting molecular diversity within the Gryphaeidae family.
- Phylogenetic analysis shows Gryphaeidae as closely related to Ostreidae, contributing valuable insights for future research on gene order variations in the Ostreoidea superfamily.
Article Abstract
Different from the true oyster (family Ostreidae), the molecular diversity of the gryphaeid oyster (family Gryphaeidae) has never been sufficiently investigated. In the present study, the complete mitochondrial (mt) genome of was sequenced and compared with those of other ostreoids. The total length of mtDNA is 30,385 bp, encoding 12 protein-coding-genes (PCGs), 26 transfer RNA (tRNA) genes and two ribosomal RNA (rRNA) genes. The nucleotide composition and codon usage preference of mtDNA is similar to that of within the same genus. On the other hand, the presence of three and three genes of was not detected neither in nor other ostroid species. Another unique character of mtDNA is that both and have a nearly identical duplication. The PCG order of is identical to and the two congener species also share an identical block of 12 tRNA genes. The tRNA rearrangements mostly happen in the region from to , the same area where the duplicated genes are located. The rearrangements within Gryphaeidae could be explained by a "repeat-random loss model". Phylogenetic analyses revealed Gryphaeidae formed by + as sister to Ostreidae, whereas the phylogenetic relationship within the latter group remains unresolved. The present study indicated the mitogenomic diversity within Gryphaeidae and could also provide important data for future better understanding the gene order rearrangements within superfamily Ostreoidea.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10848854 | PMC |
| http://dx.doi.org/10.3897/BDJ.11.e101333 | DOI Listing |
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