Ontology highlight
ABSTRACT:
PROVIDER: PRJNA577468 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR10276190_1.fastq.gz | Fastqsanger.gz | |||
| SRR10276190_2.fastq.gz | Fastqsanger.gz | |||
| SRR10276191_1.fastq.gz | Fastqsanger.gz | |||
| SRR10276191_2.fastq.gz | Fastqsanger.gz | |||
| SRR10276192_1.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 6 |
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Project description:An animal’s ability to effectively capture prey and defend against predators is pivotal to its survival1. A key innovation in many predator-prey interactions is venom, which consists of many toxin proteins that shape its phenotype2. Its unusually direct relationship of gene-toxin-phenotype make it an appealing system for studies at the organismal level 3,4. In this work we use the sea anemone Nematostella vectensis as a model organism as it provides us with the opportunity to test for the first time how toxin-genotypes impact predator-prey interactions. Specifically, we compare a native-population5 and a transgenic line which both have significantly reduced levels of Nv1, the major toxin in adult Nematostella6, to animals with wildtype levels of Nv1. We demonstrate that the transgenic strain phenocopies native anemones lacking Nv1 as they both have impaired ability to defend themselves against grass shrimp, a native predator. Mummichog killifish, unexpectedly are attracted to Nematostella with wildtype-levels of Nv1, highlighting that Nv1 plays a complex role in shaping interspecific-interactions. Finally, we demonstrate an evolutionary tradeoff as the reduction of Nv1 levels causes faster growth and increased reproductive rates compared to Nematostella control lines. Overall, our results experimentally link organism’s venom to its physiology, reproduction and interspecific interactions.
2023-12-31 | PXD043447 | Pride
Project description:An animal’s ability to effectively capture prey and defend against predators is pivotal to its survival1. A key innovation in many predator-prey interactions is venom, which consists of many toxin proteins that shape its phenotype2. Its unusually direct relationship of gene-toxin-phenotype make it an appealing system for studies at the organismal level 3,4. In this work we use the sea anemone Nematostella vectensis as a model organism as it provides us with the opportunity to test for the first time how toxin-genotypes impact predator-prey interactions. Specifically, we compare a native-population5 and a transgenic line which both have significantly reduced levels of Nv1, the major toxin in adult Nematostella6, to animals with wildtype levels of Nv1. We demonstrate that the transgenic strain phenocopies native anemones lacking Nv1 as they both have impaired ability to defend themselves against grass shrimp, a native predator. Mummichog killifish, unexpectedly are attracted to Nematostella with wildtype-levels of Nv1, highlighting that Nv1 plays a complex role in shaping interspecific-interactions. Finally, we demonstrate an evolutionary tradeoff as the reduction of Nv1 levels causes faster growth and increased reproductive rates compared to Nematostella control lines. Overall, our results experimentally link organism’s venom to its physiology, reproduction and interspecific interactions.
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Project description:Predator-prey interactions between bacteria and the nematode Caenorhabditis elegans via interkingdom signaling molecule indole
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Project description:Bdellovibrio bacteriovorus is a Gram-negative bacterium that is a pathogen of other Gram-negative bacteria, including many bacteria which are pathogens of humans, animals and plants. As such Bdellovibrio has potential as a biocontrol agent, or living antibiotic. B. bacteriovorus HD100 has a large genome and it is not yet known which of it encodes the molecular machinery and genetic control of predatory processes. We have tried to fill this knowledge-gap using mixtures of predator and prey mRNAs to monitor changes in Bdellovibrio gene expression at a timepoint of early-stage prey infection and prey killing in comparison to control cultures of predator and prey alone and also in comparison to Bdellovibrio growing axenically (in a prey-or host independent “HI” manner) on artificial media containing peptone and tryptone. From this we have highlighted genes of the early predatosome with predicted roles in prey killing and digestion and have gained insights into possible regulatory mechanisms as Bdellovibrio enter and establish within the prey bdelloplast. Approximately seven percent of all Bdellovibrio genes were significantly up-regulated at 30 minutes of infection- but not in HI growth- implicating the role of these genes in prey digestion. Five percent were down-regulated significantly, implicating their role in free-swimming, attack-phase physiology. This study gives the first post- genomic insight into the predatory process and reveals some of the important genes that Bdellovibrio expresses inside the prey bacterium during the initial attack. Keywords: Transcriptional analysis
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