Null
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB89854 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR15075903_1.fastq.gz | Fastqsanger.gz | |||
| ERR15075903_2.fastq.gz | Fastqsanger.gz | |||
| ERR15075904_1.fastq.gz | Fastqsanger.gz | |||
| ERR15075904_2.fastq.gz | Fastqsanger.gz | |||
| ERR15075905_1.fastq.gz | Fastqsanger.gz |
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Project description:Efficient virus replication in its vector, Aedes mosquitoes, is essential for the transmission of arboviral diseases like dengue virus (DENV) in populations. In order to identify RNA-independent host factors involved in DENV replication in mosquitoes, we established a system expressing all non-structural proteins within the context of the macro protein complex as observed during viral infections. Mosquito host factors interacting with 3xFLAGED-tagged DENV non-structural proteins NS1 or NS5 proteins were identified by label-free mass spectrometry.
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Project description:We report a global survey of viral small RNAs (vsmRNAs) from >200 Aedes aegypti samples to identify many mosquito viruses that actively infect this prominent arboviral vector. Ae. aegypti viruses in the Americas were abundant, with some displaying geographical boundaries. Viruses infecting Asian Ae. aegypti were similar to those in the Americas and revealed the first wild example of dengue vsmRNAs. African Ae. aegypti displayed vsmRNAs from viruses unique to these African strains. Academic lab colonies generally lacked viruses, yet two commercial strains were deeply infected by a tombus-like virus that is related to plant viruses. Comparing matched viral long RNAs to vsmRNAs revealed viral transcripts evading the mosquito RNA interference (RNAi) pathway. By infecting mosquito cells with Ae. aegypti homogenates, we generated stably infected cell lines which produced vsmRNAs that were comparable to native mosquito vsmRNA patterns. Lastly, we demonstrate that these stably infected mosquito cells producing vsmRNAs can exert gene silencing of reporters bearing viral sequence segments, providing a potential explanation for how Ae. aegypti can tolerate the persistence of viral infections. This vsmRNA genomics approach in Ae. aegypti can add to existing vector surveillance approaches by discovering new viruses that persist in mosquito populations.
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Project description:We report a global survey of viral small RNAs (vsmRNAs) from >200 Aedes aegypti samples to identify many mosquito viruses that actively infect this prominent arboviral vector. Ae. aegypti viruses in the Americas were abundant, with some displaying geographical boundaries. Viruses infecting Asian Ae. aegypti were similar to those in the Americas and revealed the first wild example of dengue vsmRNAs. African Ae. aegypti displayed vsmRNAs from viruses unique to these African strains. Academic lab colonies generally lacked viruses, yet two commercial strains were deeply infected by a tombus-like virus that is related to plant viruses. Comparing matched viral long RNAs to vsmRNAs revealed viral transcripts evading the mosquito RNA interference (RNAi) pathway. By infecting mosquito cells with Ae. aegypti homogenates, we generated stably infected cell lines which produced vsmRNAs that were comparable to native mosquito vsmRNA patterns. Lastly, we demonstrate that these stably infected mosquito cells producing vsmRNAs can exert gene silencing of reporters bearing viral sequence segments, providing a potential explanation for how Ae. aegypti can tolerate the persistence of viral infections. This vsmRNA genomics approach in Ae. aegypti can add to existing vector surveillance approaches by discovering new viruses that persist in mosquito populations.
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Project description:In this study, we describe a viral suppressor of RNA silencing encoded by the prototype flavivirus, yellow fever virus (YFV). We show that the YFV capsid protein inhibits RNA silencing in the mosquito Aedes aegypti by interfering with Dicer. These results suggest a molecular arms race between vector and pathogen underlies the continued existence of flaviviruses in nature.
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