Cited by 48Viral Infections and Immunology ResearchVirology and Viral DiseasesEvolution and Genetic Dynamics

Studies on the Attenuation Phenotype of Polio Vaccines: Poliovirus RNA Polymerase Derived from Sabin Type 1 Sequence Is Temperature Sensitive in the Uridylylation of VPg

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Paul, Aniko V., Mugavero, JoAnn, Yin, Jiang, Hobson, Scott, Schultz, Steve, van Boom, Jacques H., Wimmer, Eckard·2000·Virology

Abstract

Determinants of temperature sensitivity and/or attenuation in Sabin type 1 poliovirus reside in the 5' NTR and coding sequences of the capsid proteins and viral RNA polymerase, 3D(pol). Previous studies have implicated at least two mutations in 3D(pol) of Sabin 1 vaccine strain [PV1(S)], including a Y73H change, as contributing to these phenotypes. We have used an in vitro assay to test the first step in RNA synthesis, the uridylylation of the terminal protein VPg with 3D(pol) isolated from PV1(S). Wt and two mutant 3D(pol) proteins (Y73H, D53N/Y73H) were expressed in Escherichia coli and were purified, and their activities were measured in the synthesis of VPgpU(pU) and of VPg-linked poly(U) at 30 and 39.5 degrees C. Our results show that at 39.5 degrees C the Y73H mutation leads to a defect in the synthesis of VPgpUp(U) and of VPg-poly(U) but not in the elongation of a (dT)(15) primer. The double mutant protein had the same activities as Y73H 3D(pol). Using the yeast two-hybrid assay, we detected a reduced interaction between 3D(pol) molecules carrying either the single or double mutations. Tyrosine-73 maps to the finger domain in the three-dimensional structure of 3D(pol). A model will be presented in which a change of Y73 to H73 may interfere with an interaction between two polymerase molecules that, in turn, may interfere with VPg uridylylation. Alternative explanations, however, cannot be excluded at the present time.

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Crossref · 10.1006/viro.2000.0354

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  • Sabin and other developers of OPV strains struck a balance between low neuropathogenicity, good immunogenicity, and acceptable levels of genetic stability.

    “Sabin and other developers of OPV strains struck a balance between low neuropathogenicity, good immunogenicity, and acceptable levels of genetic stability (150).”

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Authors
Paul, A. V., Mugavero, J., Yin, J., Hobson, S., Schultz, S., van Boom, J. H., & Wimmer, E.
Affiliations
  • Stony Brook University (US)
  • University of Colorado Boulder (US)
Venue
Virology
Publisher
Elsevier BV
Published
2000-06
Volume
272
Issue
1
Pages
72-84
ISSN
0042-6822 (ISSN-L)
OpenAlex
W1970725479
Cited by
48
References
52
Citations by year
2025: 3 · 2024: 2 · 2023: 1 · 2022: 1 · 2020: 1 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 3 · 2014: 5 · 2013: 1 · 2012: 1
FWCI
1.24
Type
journal article
Language
en
Open access
Locations
  • Virology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Allergy and Infectious Diseases (R01 AI-15122, R01AI015122)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Viral Infections and Immunology Research
  • Health Sciences › Medicine › Epidemiology › Virology and Viral Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
Keywords
temperature sensitivity, viral RNA polymerase, 3D polymerase, finger domain
MeSH terms
Amino Acid Sequence, HeLa Cells, Humans, Hydrogen Bonding, Models, Molecular, Molecular Sequence Data, Mutation, Phenotype, Viral Plaque Assay, Poliovirus Vaccine, Oral, Poly U, Protein Binding, Protein Conformation, DNA-Directed RNA Polymerases, RNA-Dependent RNA Polymerase, RNA, Messenger, RNA, Viral, Temperature, Transcription, Genetic, Protein Biosynthesis, Vaccines, Attenuated, Viral Core Proteins, Poliovirus, Amino Acid Substitution, Two-Hybrid System Techniques

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