Octopus sinensis
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1095235 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR28537241_1.fastq.gz | Fastqsanger.gz | |||
| SRR28537241_2.fastq.gz | Fastqsanger.gz | |||
| SRR28537242_1.fastq.gz | Fastqsanger.gz | |||
| SRR28537242_2.fastq.gz | Fastqsanger.gz | |||
| SRR28537243_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 12 |
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Project description:Octopus sinensis isolate:Ov201803 Genome sequencing and assembly
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Project description:The Chinese sturgeon (Acipenser sinensis) is anadromous fish distributed in Yangtze River and East China Sea. In this study, we reported cleft-palate Chinese sturgeons in artificial population for the first time. In order to explore the genetic basis of palate malformation in A. sinensis, Illumina RNA-seq technology was used to analyze the transcriptome data of normal and cleft-palate individuals in farmed Chinese sturgeons. Raw reads were obtained and assembled into 808,612 unigenes, with an average length of 509.33 bp and an N50 of 574 bp. Sequence similarity analyses against four public databases (Nr, Uniprot, KEGG and COGs) found 158,642 unigenes that can be annotated. GABAergic synapse and TGF-β signal pathway were the most two enriched pathways with high Richfactor in the analyses of different expressed genes. In these two signal pathways, six genes (GABRA4, GS, GNS, S6K, PITX2, and BMP8) were found as cleft-palate genes in Chinese sturgeon. These findings contribute to our understanding of the genetic basis of cleft palate in sturgeon, while simultaneously adding to our knowledge about craniofacial development.
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Project description:Common octopus, Octopus vulgaris, is an economically important cephalopod species. However, its rearing under captivity is currently challenged by massive mortalities previous to their juvenile stage due to nutritional and environmental factors. Dissecting the genetic basis and regulatory mechanism behind this mortality requires genomic background knowledge. A transcriptomic sequencing of 10 dph octopus paralarvae from different experimental conditions was constructed via RNA-seq. A total of 613,767,530 raw reads were filtered and de novo assembled into 363,527 contigs of which 82,513 were annotated in UniProt carrying also their GO and KEGG information. Differential gene expression analysis was carried out on paralarvae reared under different diet regimes and temperatures, also including wild paralarvae. Genes related to lipid metabolism exhibited higher transcriptional levels in individuals whose diet includes crustacean zoeas, which had an impact over their development and immune response capability. High temperature induces acclimation processes at the time that increase metabolic demands and oxidative stress. Wild individuals show an expression profile unexpectedly similar to Artemia fed individuals. Proteomic results support the hypothesis revealed by transcriptional analysis. The comparative study of the O. vulgaris transcriptomic profiles allowed the identification of genes that deserve to be further studied as candidates for biomarkers of development and health. The results obtained here on the transcriptional variations of genes caused by diet and temperature will provide new perspectives in understanding the molecular mechanisms behind nutritional and temperature requirements of common octopus that will open new opportunities to deepen in paralarvae rearing requirements.
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Project description:Octopuses are mollusks that evolved intricate neural systems which are comparable with vertebrates in terms of cell number, complexity and size. Exactly how an octopus increases its neural cell number so dramatically and whether an increase in cell type diversity enables higher cognitive function and complex behavior is still unknown. To profile the cell diversity of the developing octopus brain we applied 10x Genomics’ single-cell/nuclei RNA sequencing technology. At hatching, the Octopus vulgaris brain possesses the main lobes and connections of an adult brain, but which cell types are present remains elusive. We were able to identify 42 robust cell types comprising mostly neural cells, as well as multiple glial subtypes and other non-neuronal populations such as endothelial cells and fibroblasts. In situ expression analysis of marker genes allowed spatial mapping of clusters, including vertical lobe cells and several optic lobe cell types. Investigation of cell type conservation indicated similar gene expression signatures between glial cells of mice, fly and octopus. Genes related to memory and learning were found enriched in vertical lobe cells, that showed molecular similarities with Kenyon cells in Drosophila but not to any mouse cell type. Lastly, we also analyzed the expression of newly expanded gene families (protocadherins, C2H2 zinc-finger transcription factors and G-protein coupled receptors) and found that these are enriched in specific cell types. Taken together, our data gives insight into cell type evolution and the composition of the complex octopus brain.
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