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Functional interrogation of a SARS-CoV-2 host protein interactome identifies unique and shared coronavirus host factors

ABSTRACT: Functional interrogation of a SARS-CoV-2 host protein interactome identifies unique and shared coronavirus host factors

PROVIDER: PRJNA680345 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13118500.fastq.gz	Fastqsanger.gz
	SRR13118501.fastq.gz	Fastqsanger.gz
	SRR13118502.fastq.gz	Fastqsanger.gz
	SRR13118503.fastq.gz	Fastqsanger.gz
	SRR13118504.fastq.gz	Fastqsanger.gz

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Functional interrogation of a SARS-CoV-2 host protein interactome identifies unique and shared coronavirus host factors

Project description:The ongoing SARS-CoV-2 pandemic has devastated the global economy and claimed more than one million lives, presenting an urgent global health crisis. To identify host factors required for infection by SARS-CoV-2 and seasonal coronaviruses, we designed a focused high-coverage CRISPR-Cas9 library targeting 332 members of a recently published SARS-CoV-2 protein interactome. We leveraged the compact nature of this library to systematically screen SARS-CoV-2 at two physiologically relevant temperatures (33 ºC and 37 ºC) along with three related coronaviruses (HCoV-229E, HCoV-NL63, and HCoV-OC43), allowing us to probe this interactome at a much higher resolution relative to genome scale studies. This approach yielded several new insights, including unexpected virus-specific differences in Rab GTPase requirements and GPI anchor biosynthesis, as well as identification of multiple pan-coronavirus factors involved in cholesterol homeostasis. This coronavirus essentiality catalog could inform ongoing drug development efforts aimed at intercepting and treating COVID-19, and help prepare for future coronavirus outbreaks.

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Project description:The coronavirus disease 2019 (COVID-19) pandemic was caused by severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2). Understanding the molecular functions of SARS-CoV-2 proteins is thus imperative to developing effective antiviral treatments. Here, we use enhanced crosslinking and immunoprecipitation to investigate SARS-CoV-2 protein interactions with viral and host RNAs. SARS-CoV-2 proteins, NSP8 and NSP12, are found to specifically bind to untranslated regions of the RNA viral genome, with NSP12 additionally binding to all transcription regulatory sequences. This provides evidence for their central roles in replication and transcription. Moreover, we discovered a potential site of NSP12 mediated genome recombination, which could explain the genetic diversity found in coronaviruses. SARS-CoV-2 proteins exogenously expressed in human lung epithelial cells bind to 4,281 unique host RNAs. Nine SARS-CoV-2 proteins upregulate target gene expression, including NSP12 which upregulates mitochondrial electron transport and N-linked glycosylation proteins. Furthermore, siRNA knockdown of NSP12-targeted proteins in human lung organoid cells demonstrates substantial antiviral effects. Conversely, NSP9 inhibits host gene expression via blocking mRNA export and dampens antiviral inflammation response such as interleukin 1α (IL1α) production. Our extensive viral protein-RNA interactome provides a catalog of potential therapeutic targets and offers insight into the etiology of COVID-19 as a safeguard against future pandemics.

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