Evidence map›Paper›PMID 35438536›Full record

ArticleJournal of virology2022

The HIV-1 Viral Protease Is Activated during Assembly and Budding Prior to Particle Release.

Caroline O Tabler, Sarah J Wegman, Jiji Chen, Hari Shroff, Najwa Alhusaini, John C Tilton

Open access · greenAbstract read
In one paragraph

Article in Journal of virology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
2.4field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 35 citations in OpenAlex.

  1. Mechanisms of HIV-1 assembly, release and maturation.Nature reviews. Microbiology · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Caroline O TablerCenter for Proteomics and Bioinformatics, Department of Nutrition, School of Medicine, Case Western Reserve Universitygrid.67105.35, Cleveland, Ohio, USA.
Sarah J WegmanCenter for Proteomics and Bioinformatics, Department of Nutrition, School of Medicine, Case Western Reserve Universitygrid.67105.35, Cleveland, Ohio, USA.
Jiji ChenAdvanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, Maryland, USA.
Hari ShroffAdvanced Imaging and Microscopy Resource, National Institutes of Health, Bethesda, Maryland, USA.
Najwa AlhusainiCenter for Proteomics and Bioinformatics, Department of Nutrition, School of Medicine, Case Western Reserve Universitygrid.67105.35, Cleveland, Ohio, USA.
John C TiltonCenter for Proteomics and Bioinformatics, Department of Nutrition, School of Medicine, Case Western Reserve Universitygrid.67105.35, Cleveland, Ohio, USA.ORCID 0000-0002-4218-5870
Case Western Reserve University · USNational Institutes of Health · US

Funding

WG3: HIV, Co-infections and Co-morbiditiesP30AI036219 · NIAID · CASE WESTERN RESERVE UNIVERSITY · PI Alan David Levine · 1994 to 2026
$50.0M
Section on High Resolution Optical ImagingZIAEB000074 · NIBIB · NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING · PI SHROFF, HARI · 2010 to 2022
$15.2M
Novel approaches to understanding precursor protease autoprocessing in intact virusesR01AI140847 · NIAID · CASE WESTERN RESERVE UNIVERSITY · PI TILTON, JOHN CHRISTIAN · 2019 to 2023
$2.6M
Training Program in HIV CureT32AI127201 · NIAID · CASE WESTERN RESERVE UNIVERSITY · PI LEVINE, ALAN DAVID · 2016 to 2020
$919k
NIAID NIH HHS P30 AI036219NIAID NIH HHS R01 AI140847NIAID NIH HHS T32 AI127201
6 · The paper itself

Abstract

HIV-1 encodes a viral protease that is essential for the maturation of infectious viral particles. While protease inhibitors are effective antiretroviral agents, recent studies have shown that prematurely activating, rather than inhibiting, protease function leads to the pyroptotic death of infected cells, with exciting implications for efforts to eradicate viral reservoirs. Despite 40 years of research into the kinetics of protease activation, it remains unclear exactly when protease becomes activated. Recent reports have estimated that protease activation occurs minutes to hours after viral release, suggesting that premature protease activation is challenging to induce efficiently. Here, monitoring viral protease activity with sensitive techniques, including nanoscale flow cytometry and instant structured illumination microscopy, we demonstrate that the viral protease is activated within cells prior to the release of free virions. Using genetic mutants that lock protease into a precursor conformation, we further show that both the precursor and mature protease have rapid activation kinetics and that the activity of the precursor protease is sufficient for viral fusion with target cells. Our finding that HIV-1 protease is activated within producer cells prior to release of free virions helps resolve a long-standing question of when protease is activated and suggests that only a modest acceleration of protease activation kinetics is required to induce potent and specific elimination of HIV-infected cells.

Indexed as

HIV-1HIV ProteaseEnzyme ActivationHIV InfectionsHumansProtease InhibitorsHIV ProteaseProtease InhibitorsHIV-1 proteaseinstant structured illumination microscopymature proteasenanoscale flow cytometryprecursor proteaseprotease activation

Identifiers

PMID35438536
PMCPMC9093094
OpenAlexW4224242126

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.