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Environmental and molecular regulation of asexual reproduction in the cnidarian Nematostella vectensis

ABSTRACT: Environmental and molecular regulation of asexual reproduction in the cnidarian Nematostella vectensis

PROVIDER: PRJNA928393 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23242632.fastq.gz	Fastqsanger.gz
	SRR23242633.fastq.gz	Fastqsanger.gz
	SRR23242634.fastq.gz	Fastqsanger.gz
	SRR23242635.fastq.gz	Fastqsanger.gz
	SRR23242636.fastq.gz	Fastqsanger.gz

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Post transcriptional modifications of miRNAs in the cnidarian Nematostella vectensis

Project description:MicroRNAs of bilaterian animals undergo posttranscriptional modifications such as methylation, tailing and trimming that regulate miRNA stability and function. To gain insight on the evolution of miRNA posttranscriptional modification, we studied regulation of miRNA stability by methylation in the sea anemone Nematostella vectensis, a representative of Cnidaria, the sister group of Bilateria.

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Cyclic dinucleotide stimulation of Nematostella vectensis

Project description:In mammals, the cGAS-cGAMP-STING pathway is crucial for sensing viral infection and initiating an anti-viral type I interferon response. cGAS and STING are highly conserved genes that originated in bacteria and are present in most animals. By contrast, interferons only emerged in vertebrates; thus, the function of STING in invertebrates is unclear. Here, we use the STING ligand 2'3'-cGAMP to activate immune responses in a model cnidarian invertebrate, the starlet sea anemone Nematostella vectensis. Using RNA-Seq, we found that 2'3'-cGAMP induces robust transcription of both anti-viral and anti-bacterial genes, including the conserved transcription factor NF-κB. Knockdown experiments identified a role for NF-κB in specifically inducing anti-bacterial genes downstream of 2'3'-cGAMP, and some of these genes were also found to be induced during Pseudomonas aeruginosa infection. Furthermore, we characterized the protein product of one of the putative anti-bacterial genes, the N. vectensis homolog of Dae4, and found that it has conserved anti-bacterial activity. This work describes an unexpected role of a cGAMP sensing pathway in anti-bacterial immunity and suggests that a broad transcriptional response is an evolutionarily ancestral output of 2'3'-cGAMP signaling in animals.

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