Evidence map›Paper›PMID 21994443›Full record

ArticleJournal of virology2011

Site-specific proteolytic cleavage of the amino terminus of herpes simplex virus glycoprotein K on virion particles inhibits virus entry.

Nithya Jambunathan, Sona Chowdhury, Ramesh Subramanian, Vladimir N Chouljenko, Jason D Walker, Konstantin G Kousoulas

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 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
3.0field-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

25 citing papers in PubMed, 40 citations in OpenAlex.

  1. Article
  2. Article
  3. Frontiers in microbiology · 2022
    Review
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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 1 institution in 1 country.

Nithya JambunathanDivision of Biotechnology and Molecular Medicine and Department of Pathobiological Sciences, Louisiana State University, Skip Bertman Drive, Baton Rouge, LA 70803, USA.
Sona Chowdhury
Ramesh Subramanian
Vladimir N Chouljenko
Jason D Walker
Konstantin G Kousoulas
Louisiana State University · US

Funding

TNF AND MCP-1 IN RETROVIRUS-INDUCED BRAIN DISEASEP20RR020159 · NCRR · LOUISIANA STATE UNIV A&M COL BATON ROUGE · PI PAHAR, BAPI · 2004 to 2011
$16.1M
GENETICS &FUNCTIONS OF HSV1 GK IN VIRUS ENTRY &EGRESSR01AI043000 · NIAID · LOUISIANA STATE UNIV A&M COL BATON ROUGE · PI KOUSOULAS, KONSTANTIN G · 1999 to 2009
$2.4M
NCRR NIH HHS P20 RR020159NIAID NIH HHS AI43000NIAID NIH HHS R01 AI043000
6 · The paper itself

Abstract

Herpes simplex virus 1 (HSV-1) glycoprotein K (gK) is expressed on virions and functions in entry, inasmuch as HSV-1(KOS) virions devoid of gK enter cells substantially slower than is the case for the parental KOS virus (T. P. Foster, G. V. Rybachuk, and K. G. Kousoulas, J. Virol. 75:12431-12438, 2001). Deletion of the amino-terminal 68-amino-acid (aa) portion of gK caused a reduction in efficiency and kinetics of virus entry similar to that of the gK-null virus in comparison to the HSV-1(F) parental virus. The UL20 membrane protein and gK were readily detected on double-gradient-purified virion preparations. Immuno-electron microscopy confirmed the presence of gK and UL20 on purified virions. Coimmunoprecipitation experiments using purified virions revealed that gK interacted with UL20, as has been shown in virus-infected cells (T. P. Foster, V. N. Chouljenko, and K. G. Kousoulas, J. Virol. 82:6310-6323, 2008). Scanning of the HSV-1(F) viral genome revealed the presence of a single putative tobacco etch virus (TEV) protease site within gD, while additional TEV predicted sites were found within the UL5 (helicase-primase helicase subunit), UL23 (thymidine kinase), UL25 (DNA packaging tegument protein), and UL52 (helicase-primase primase subunit) proteins. The recombinant virus gDΔTEV was engineered to eliminate the single predicted gD TEV protease site without appreciably affecting its replication characteristics. The mutant virus gK-V5-TEV was subsequently constructed by insertion of a gene sequence encoding a V5 epitope tag in frame with the TEV protease site immediately after gK amino acid 68. The gK-V5-TEV, R-gK-V5-TEV (revertant virus), and gDΔTEV viruses exhibited similar plaque morphologies and replication characteristics. Treatment of the gK-V5-TEV virions with TEV protease caused approximately 32 to 34% reduction of virus entry, while treatment of gDΔTEV virions caused slightly increased virus entry. These results provide direct evidence that the gK and UL20 proteins, which are genetically and functionally linked to gB-mediated virus-induced cell fusion, are structural components of virions and function in virus entry. Site-specific cleavage of viral glycoproteins on mature and fully infectious virions utilizing unique protease sites may serve as a generalizable method of uncoupling the roles of viral glycoproteins in virus entry and virion assembly.

Indexed as

Virus InternalizationAnimalsChlorocebus aethiopsEndopeptidasesHerpesvirus 1, HumanMutant ProteinsProteolysisVero CellsViral ProteinsVirionEndopeptidasesMutant ProteinsTEV proteaseUL53 protein, Human herpesvirus 1Viral Proteins

Identifiers

PMID21994443
PMCPMC3233161
OpenAlexW2153496359

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.