Evidence map›Paper›PMID 21106735›Full record

ArticleJournal of virology2011

HIV-1 maturation inhibitor bevirimat stabilizes the immature Gag lattice.

Paul W Keller, Catherine S Adamson, J Bernard Heymann, Eric O Freed, Alasdair C Steven

Open access · bronzeAbstract read
In one paragraph

Article in Journal of virology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
3.6field-weighted citation impact, top 6% 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

81 citing papers in PubMed, 117 citations in OpenAlex.

  1. Trial
  2. Mechanisms of HIV-1 assembly, release and maturation.Nature reviews. Microbiology · 2026
    Review
  3. Synthesis ofMagnetic resonance in chemistry : MRC · 2026
    Article
  4. Lenacapavir binding to immature Gag induces giant virions and causes protease-dependent inhibition of viral release.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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  19. High resolution electron tomography and segmentation-by-modeling interpretation in Bsoft.Protein science : a publication of the Protein Society · 2021
    Article
  20. Viral structural proteins as targets for antivirals.Current opinion in virology · 2020
    Review

21 more citing papers are in PubMed but not listed here.

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

5 authors at 3 institutions in 2 countries.

Paul W KellerLaboratory of Structural Biology Research, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Building 50, Room 1517, 50 South Drive, MSC 8025, Bethesda, MD 20892, USA.
Catherine S Adamson
J Bernard Heymann
Eric O Freed
Alasdair C Steven
National Cancer Institute · USNational Institute of Arthritis and Musculoskeletal and Skin Diseases · USNational Institutes of Health · US

Funding

Inhibition of HIV-1 MaturationZIABC010778 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI FREED, ERIC · 2009 to 2025
$9.7M
Structural Biology Of Retrovirus AssemblyZIAAR041166 · NIAMS · NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES · PI STEVEN, ALASDAIR C. · 2009 to 2020
$9.2M
Intramural NIH HHS
6 · The paper itself

Abstract

Maturation of nascent virions, a key step in retroviral replication, involves cleavage of the Gag polyprotein by the viral protease into its matrix (MA), capsid (CA), and nucleocapsid (NC) components and their subsequent reorganization. Bevirimat (BVM) defines a new class of antiviral drugs termed maturation inhibitors. BVM acts by blocking the final cleavage event in Gag processing, the separation of CA from its C-terminal spacer peptide 1 (SP1). Prior evidence suggests that BVM binds to Gag assembled in immature virions, preventing the protease from accessing the CA-SP1 cleavage site. To investigate this hypothesis, we used cryo-electron tomography to examine the structures of (noninfectious) HIV-1 viral particles isolated from BVM-treated cells. We find that these particles contain an incomplete shell of density underlying the viral envelope, with a hexagonal honeycomb structure similar to the Gag lattice of immature HIV but lacking the innermost, NC-related, layer. We conclude that the shell represents a remnant of the immature Gag lattice that has been processed, except at the CA-SP1 sites, but has remained largely intact. We also compared BVM-treated particles with virions formed by the mutant CA5, in which cleavage between CA and SP1 is also blocked. Here, we find a thinner CA-related shell with no visible evidence of honeycomb organization, indicative of an altered conformation and further suggesting that binding of BVM stabilizes the immature lattice. In both cases, the observed failure to assemble mature capsids correlates with the loss of infectivity.

Indexed as

Anti-HIV Agentsgag Gene Products, Human Immunodeficiency VirusGenes, gagHeLa CellsHIV-1HumansMutationPentacyclic TriterpenesSuccinatesTomographyTriterpenesVirionVirus AssemblyAnti-HIV Agentsbevirimatgag Gene Products, Human Immunodeficiency VirusPentacyclic TriterpenesSuccinatesTriterpenes

Identifiers

PMID21106735
PMCPMC3028903
OpenAlexW2160176988

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.