JE Carette et al. Nature 000, 1-4 (2011) - Virus entry in HOPS complex and NPC1 deficient cells

Oct 20, 2026

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This research document, published in Nature (2011), investigates the mechanisms of viral entry, specifically focusing on the role of the HOPS complex and the Niemann-Pick C1 (NPC1) protein. Through a series of experimental assays, the study demonstrates that viral entry is arrested at a critical late stage in cells deficient for these components. The content includes detailed visualization of viral particles, infectivity assays in HAP1 cells, and comparative cellular analysis using various genetic models including VPS11, VPS33A, and NPC1 mutants. The evidence highlights that both the HOPS complex and NPC1 are essential for the successful trafficking and entry of viruses like Ebola, providing significant insights into viral pathogenesis and potential therapeutic targets. By analyzing morphological changes through imaging and viral load quantification, the authors establish a clear functional requirement for these host factors in late-stage viral entry pathways.

LanguageEnglish

CategoryResearch & Report

FormatPPT

Pages1

Reading Time3 min

AccessFree to download

Viral Entry Arrest in Deficient Cells

Experimental Analysis of VPS and NPC1

Viral Infectivity Assays

Morphological Observations of Viral Entry

FAQs

What happens to viral entry in cells deficient for the HOPS complex and NPC1?

The research indicates that viral entry is arrested at a late step within these deficient cells, preventing successful infection.

Which specific genetic models were used to study this effect?

The study utilized HAP1 cells, focusing on genetic deficiencies including VPS11GT, VPS33AGT, NPC1GT1, and NPC1GT2.

How does the study demonstrate the impact of these deficiencies on viral infectivity?

The study uses viral infectivity assays (measuring -log10[IU ml-1]) and visualizes the process via microscopy, showing significant reductions in infectivity compared to control cells when these proteins are absent.

Oct 20, 2026

Upload by Mia