Cited by 84Viral Infectious Diseases and Gene Expression in InsectsGenomics and Chromatin DynamicsVirology and Viral Diseases

Structural comparison of the Autographa californica nuclear polyhedrosis virus-induced RNA polymerase and the three nuclear RNA polymerases from the host, Spodoptera frugiperda

Yang, Chun Li, Stetler, Dean A., Weaver, Robert F.·1991·Virus Research

Abstract

A partial subunit structure has been determined for the novel RNA polymerase that is induced in fall armyworm (Spodoptera frugiperda) cells upon infection with the Autographa californica nuclear polyhedrosis virus (AcNPV). The putative structure includes nine polypeptides; the complexity of this structure is in accord with the high sedimentation coefficient (15S) estimated for this enzyme. A comparison of the putative structure of the virus-induced polymerase with those of the three host nuclear RNA polymerases shows that the structure of the viral polymerase is apparently unlike any of the host nuclear polymerases. This conclusion is reinforced by immunoblot experiments that show no cross-reactivity between the virus-induced polymerase and an antiserum directed against Drosophila RNA polymerase II. The virus-induced RNA polymerase appears at the onset of the late phase of infection and still appears when viral DNA synthesis is blocked by aphidicolin. Thus, the virus-induced polymerase seems to be composed of early viral products.

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Crossref · 10.1016/0168-1702(91)90079-b

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  • Mutations that restore the original stem-loop structure in the IRES are frequently found in vaccine-related isolates from healthy OPV recipients, patients with VAPP, and the environment.

    “Mutations that restore the original stem-loop structure in the IRES [Sabin 1: G480A (backmutation) or U525C (suppressor); Sabin 2: A481G;Sabin3:U472C]arefrequentlyfound in vaccine-related isolates from healthy OPV recipients (127, 132) and patients with VAPP (61), as well as from the environment (228).”
  • The critical attenuating mutations of the Sabin strains frequently revert well before nucleotide substitutions accumulate to the level of 1%.

    “Indeed, the critical attenuating mutations of the Sabin strains frequently revert well before nucleotide substitutions accumulate to the level of 1% (126, 127, 228).”

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Authors
Yang, C. L., Stetler, D. A., & Weaver, R. F.
Affiliations
University of Kansas (US)
Corresponding author
Weaver, Robert F.
Venue
Virus Research
Publisher
Elsevier BV
Published
1991-08
Volume
20
Issue
3
Pages
251-264
ISSN
0168-1702 (ISSN-L)
OpenAlex
W2082572239
Cited by
84
References
27
Citations by year
2020: 1 · 2014: 2 · 2012: 3
FWCI
2.38
Type
journal article
Language
en
Open access
closed
Locations
  • Virus Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (GM22127)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Viral Infectious Diseases and Gene Expression in Insects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Health Sciences › Medicine › Epidemiology › Virology and Viral Diseases
Keywords
Autographa californica nuclear polyhedrosis virus, Spodoptera frugiperda, nuclear RNA polymerase, host RNA polymerase, structural comparison, aphidicolin, viral DNA replication, insect virus infection
MeSH terms
Animals, Centrifugation, Density Gradient, Chromatography, Ion Exchange, Cross Reactions, Electrophoresis, Polyacrylamide Gel, Moths, DNA-Directed RNA Polymerases, RNA, Viral, Time Factors, Transcription, Genetic, RNA, Nuclear, Immunoblotting, DNA Probes, Baculoviridae, Aphidicolin

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