Transcriptome assemblies of two deep-sea octocorals Calyptrophora lyra and Chrysogorgia stellata from West Pacific seamount, Godin Guyot

Ryu, Taewoo; Hwang, Sun‐Tak; Woo, Seonock

doi:10.1016/j.margen.2022.101006

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…Colony 1 RG-2022, Stylophora pistillata [39], Palythoa heliodiscus [40], Palythoa grandis [40], and Ricordea florida. A few additional species could be added to this list (Acropora tenuis [41], Montipora digitata [42], Alveopora japonica [43], Parachrysogorgia stellata [44], and Fimbriaphyllia ancora [45]) thanks to transcriptomic evidence. Most of these species belong to different families within the order Scleractinia (i.e.…”

Section: Phylum Cnidariamentioning

confidence: 99%

Taxonomic Distribution and Molecular Evolution of Mytilectins

Gerdol,

Nerelli,

Martelossi

et al. 2023

Marine Drugs

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R-type lectins are a widespread group of sugar-binding proteins found in nearly all domains of life, characterized by the presence of a carbohydrate-binding domain that adopts a β-trefoil fold. Mytilectins represent a recently described subgroup of β-trefoil lectins, which have been functionally characterized in a few mussel species (Mollusca, Bivalvia) and display attractive properties, which may fuel the development of artificial lectins with different biotechnological applications. The detection of different paralogous genes in mussels, together with the description of orthologous sequences in brachiopods, supports the formal description of mytilectins as a gene family. However, to date, an investigation of the taxonomic distribution of these lectins and their molecular diversification and evolution was still lacking. Here, we provide a comprehensive overview of the evolutionary history of mytilectins, revealing an ancient monophyletic evolutionary origin and a very broad but highly discontinuous taxonomic distribution, ranging from heteroscleromorphan sponges to ophiuroid and crinoid echinoderms. Moreover, the overwhelming majority of mytilectins display a chimera-like architecture, which combines the β-trefoil carbohydrate recognition domain with a C-terminal pore-forming domain, suggesting that the simpler structure of most functionally characterized mytilectins derives from a secondary domain loss.

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Section: Phylum Cnidariamentioning

confidence: 99%

Taxonomic Distribution and Molecular Evolution of Mytilectins

Gerdol,

Nerelli,

Martelossi

et al. 2023

Marine Drugs

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Gene expression profiles of Japanese precious coral Corallium japonicum during gametogenesis

Pepino,

Manalili,

Sekida

et al. 2024

PeerJ

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Background Corallium japonicum, a prized resource in Japan, plays a vital role in traditional arts and fishing industries. Because of diminished stock due to overexploitation, ongoing efforts are focused on restoration through transplantation. This study aimed to enhance our understanding of the reproductive biology of these valuable corals and find more efficient methods for sex determination, which may significantly contribute to conservation initiatives. Methods We used 12 three-month aquarium reared C. japonicum colony fragments, conducted histological analysis for maturity and sex verification, and performed transcriptome analysis via de novo assembly and mapping using the C. rubrum transcriptome to explore gene expression differences between female and male C. japonicum. Results Our histological observations enabled sex identification in 33% of incompletely mature samples. However, the sex of the remaining 67% of samples, classified as immature, could not be identified. RNA-seq yielded approximately 21–31 million short reads from 12 samples. De novo assembly yielded 404,439 highly expressed transcripts. Among them, 855 showed significant differential expression, with 786 differentially expressed transcripts between females and males. Heatmap analysis highlighted 283 female-specific and 525 male-specific upregulated transcripts. Transcriptome assembly mapped to C. rubrum yielded 28,092 contigs, leading to the identification of 190 highly differentially expressed genes, with 113 upregulated exclusively in females and 70 upregulated exclusively in males. Blastp analysis provided putative protein annotations for 83 female and 72 male transcripts. Annotation analysis revealed that female biological processes were related to oocyte proliferation and reproduction, whereas those in males were associated with cell adhesion. Discussion Transcriptome analysis revealed sex-specific gene upregulation in incompletely mature C. japonicum and shared transcripts with C. rubrum, providing insight into its gene expression patterns. This study highlights the importance of using both de novo and reference-based assembly methods. Functional enrichment analysis showed that females exhibited enrichment in cell proliferation and reproduction pathways, while males exhibited enrichment in cell adhesion pathways. To the best of our knowledge, this is the first report on the gene expressions of each sex during the spawning season. Our findings offer valuable insights into the physiological ecology of incompletely mature red Japanese precious corals and suggest a method for identifying sex using various genes expressed in female and male individuals. In the future, techniques such as transplantation, artificial fertilization, and larval rearing may involve sex determination methods based on differences in gene expression to help conserve precious coral resources and ecosystems.

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Transcriptome assemblies of two deep-sea octocorals Calyptrophora lyra and Chrysogorgia stellata from West Pacific seamount, Godin Guyot

Cited by 2 publications

References 20 publications

Taxonomic Distribution and Molecular Evolution of Mytilectins

Taxonomic Distribution and Molecular Evolution of Mytilectins

Gene expression profiles of Japanese precious coral Corallium japonicum during gametogenesis

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