Evidence map›Paper›PMID 25462345›Full record

ArticleVirology2015

Structural characterization of the HSP70 interaction domain of the hepatitis C viral protein NS5A.

Ronik Khachatoorian, Piotr Ruchala, Alan Waring, Chun-Ling Jung, Ekambaram Ganapathy, Nicole Wheatley, Christopher Sundberg, Vaithilingaraja Arumugaswami, Asim Dasgupta, Samuel W French

Open access · greenAbstract read
In one paragraph

Article in Virology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed
0.4field-weighted citation impact, top 36% 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

9 citing papers in PubMed, 16 citations in OpenAlex.

  1. Review
  2. A Review: The Antiviral Activity of Cyclic Peptides.International journal of peptide research and therapeutics · 2023
    Review
  3. Review
  4. Review
  5. Therapeutic peptides ofFood science & nutrition · 2021
    Article
  6. Review
  7. Review
  8. Allosteric heat shock protein 70 inhibitors block hepatitis C virus assembly.International journal of antimicrobial agents · 2016
    Article
  9. Chaperones in hepatitis C virus infection.World journal of hepatology · 2016
    Review
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

10 authors at 3 institutions in 2 countries.

Ronik Khachatoorian *Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
Piotr Ruchala *Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
Alan WaringDivision of Molecular Medicine at the Department of Medicine, Los Angeles County Harbor-UCLA Medical Center, Torrance, California, United States of America.
Chun-Ling JungDepartment of Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, United States of America.
Ekambaram GanapathyDepartment of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
Nicole WheatleyMolecular Biology Interdepartmental Ph.D. Program (MBIDP), Molecular Biology Institute, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
Christopher SundbergDepartment of Human Genetics, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
Vaithilingaraja ArumugaswamiDepartment of Surgery, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
Asim DasguptaDepartment of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
Samuel W FrenchDepartment of Pathology and Laboratory Medicine, David Geffen School of Medicine at University of California, Los Angeles, California, United States of America.
University of California, Los Angeles · USCedars-Sinai Medical Center · USUCLA Medical Center · US

Funding

Pilot and Feasibility ProgramP30DK041301 · NIDDK · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI ROZENGURT, JUAN ENRIQUE · 1990 to 2019
$18.0M
Heat Shock Protein Synthesis Inhibitor Treatment of Hepatitis C Viral InfectionR01DK090794 · NIDDK · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI FRENCH, SAMUEL WHEELER · 2011 to 2015
$1.7M
The role of hepatitis C virus 5' untranslated region in virus morphogenesisR21AI084090 · NIAID · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI DASGUPTA, ASIM · 2010 to 2011
$411k
NIAID NIH HHS R21 AI084090NIAID NIH HHS R21AI084090NIDDK NIH HHS P30 DK041301NIDDK NIH HHS R01 DK090794NIDDK NIH HHS R01DK090794
6 · The paper itself

Abstract

We previously identified the NS5A/HSP70 binding site to be a hairpin moiety at C-terminus of NS5A domain I and showed a corresponding cyclized polyarginine-tagged synthetic peptide (HCV4) significantly blocks virus production. Here, sequence comparison confirmed five residues to be conserved. Based on NS5A domain I crystal structure, Phe171, Val173, and Tyr178 were predicted to form the binding interface. Substitution of Phe171 and Val173 with more hydrophobic unusual amino acids improved peptide antiviral activity and HSP70 binding, while similar substitutions at Tyr178 had a negative effect. Substitution of non-conserved residues with arginines maintained antiviral activity and HSP70 binding and dispensed with polyarginine tag for cellular entry. Peptide cyclization improved antiviral activity and HSP70 binding. The cyclic retro-inverso analog displayed the best antiviral properties. FTIR spectroscopy confirmed a secondary structure consisting of an N-terminal beta-sheet followed by a turn and a C-terminal beta-sheet. These peptides constitute a new class of anti-HCV compounds.

Indexed as

Amino Acid SubstitutionBinding SitesCell LineConserved SequenceHepacivirusHSP70 Heat-Shock ProteinsHumansModels, MolecularPlasmidsProtein ConformationProtein Structure, TertiaryRNA-Dependent RNA PolymeraseSpectroscopy, Fourier Transform InfraredSurface Plasmon ResonanceViral Nonstructural ProteinsHSP70 Heat-Shock ProteinsNS-5 protein, hepatitis C virusRNA-Dependent RNA PolymeraseViral Nonstructural ProteinsHCVHSP70IRESNS5APeptideProtein binding

Identifiers

PMID25462345
PMCPMC4284078
OpenAlexW2045182917

What OpenQuestion holds

Textmetadata
LicenceTDM
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.