SARS-CoV-2 ORF3A interacts with the Clic-like chloride channel-1 (CLCC1) and triggers an unfolded protein response [PeerJ]
Por um escritor misterioso
Last updated 28 setembro 2024
Understanding the interactions between SARS-CoV-2 and host cell machinery may reveal new targets to treat COVID-19. We focused on an interaction between the SARS-CoV-2 ORF3A accessory protein and the CLIC-like chloride channel-1 (CLCC1). We found that ORF3A partially co-localized with CLCC1 and that ORF3A and CLCC1 could be co-immunoprecipitated. Since CLCC1 plays a role in the unfolded protein response (UPR), we hypothesized that ORF3A may also play a role in the UPR. Indeed, ORF3A expression triggered a transcriptional UPR that was similar to knockdown of CLCC1. ORF3A expression in 293T cells induced cell death and this was rescued by the chemical chaperone taurodeoxycholic acid (TUDCA). Cells with CLCC1 knockdown were partially protected from ORF3A-mediated cell death. CLCC1 knockdown upregulated several of the homeostatic UPR targets induced by ORF3A expression, including HSPA6 and spliced XBP1, and these were not further upregulated by ORF3A. Our data suggest a model where CLCC1 silencing triggers a homeostatic UPR that prevents cell death due to ORF3A expression.
Mutation in the intracellular chloride channel CLCC1 associated with autosomal recessive retinitis pigmentosa. - Abstract - Europe PMC
Gregory Ku UCSF Health
Endoplasmic reticulum-associated SARS-CoV-2 ORF3a elicits heightened cytopathic effects despite robust ER-associated degradation
CLCC1 Antibody (NBP1-82793): Novus Biologicals
The SARS-CoV-2 accessory protein Orf3a is not an ion channel, but does interact with trafficking proteins
PDI (E7O2R) Mouse mAb Cell Signaling Technology
Crosstalk between endoplasmic reticulum stress and anti-viral activities: A novel therapeutic target for COVID-19 - ScienceDirect
Hannah Gruner - Postdoctoral Fellow - Swarthmore College
PeerJ Special Issue Advances in Illuminating the Druggable Genome
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