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Cyclic dinucleotide stimulation of Nematostella vectensis

ABSTRACT: Cyclic dinucleotide stimulation of Nematostella vectensis

PROVIDER: PRJNA734503 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14711000.fastq.gz	Fastqsanger.gz
	SRR14711001.fastq.gz	Fastqsanger.gz
	SRR14711002.fastq.gz	Fastqsanger.gz
	SRR14711003.fastq.gz	Fastqsanger.gz
	SRR14711004.fastq.gz	Fastqsanger.gz

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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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