What question did this study set out to answer?

To comprehensively map protein-protein interactions among poliovirus P3 nonstructural proteins and identify the binding determinants governing viral replication complexes.

August 1, 1998Journal of VirologyOpen Access

Complete Protein Linkage Map of Poliovirus P3 Proteins: Interaction of Polymerase 3Dpolwith VPg and with Genetic Variants of 3AB

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Population

Poliovirus P3 proteins (VPg, 3Dpol, 3AB variants) analyzed in an inducible yeast two-hybrid system

Design

Preclinical

Authors

WXWenkai XiangNational University of Defense Technology ACAndrea CuconatiRutgers, The State University of New Jersey DHDebra A. HopeUniversity of Colorado Boulder

Discussion

Member takes

Implication

Does not yet alter clinical practice; hypothesis-generating for poliovirus replication complex assembly and antiviral targeting.

Key Points

To comprehensively map protein-protein interactions among poliovirus P3 nonstructural proteins and identify the binding determinants governing viral replication complexes.
Screened homo- and heterodimer interactions among poliovirus P3 nonstructural proteins using an inducible yeast two-hybrid system.
Evaluated a panel of 3AB variants—comprising eight clustered-charge-to-alanine mutants and five single-amino-acid mutants—to map interaction interfaces.
Assessed protein interactions and oligomerization using glutaraldehyde cross-linking and far-Western blotting.
Identified 16 homo- and heterodimer interaction signals among P3 nonstructural proteins classified into three distinct groups.
Discovered a direct binding affinity between the RNA-dependent RNA polymerase 3Dpol and the genome-linked protein VPg.
Mapped separate amino acid determinants on protein 3AB required for self-interaction versus binding to polymerase 3Dpol, while proteinase 3Cpro showed no self-interaction or P3 binding in yeast.

Structured PICO

Population

Poliovirus P3 proteins (VPg, 3Dpol, 3AB variants) analyzed in an inducible yeast two-hybrid system

Intervention

Protein-protein interaction analysis using yeast two-hybrid system, far-Western blotting, and glutaraldehyde cross-linking

Outcome

Protein-protein interactions among P3 proteinssurrogate

The study maps the protein-protein interactions of poliovirus P3 proteins, revealing a novel interaction between VPg and 3Dpol that may be critical for viral genome replication.

Cite This Study

Xiang et al. (1998) studied this question.

synapsesocial.com/papers/6a7c48267eebcb99d4a16134 https://doi.org/10.1128/jvi.72.8.6732-6741.1998

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Complete Protein Linkage Map of Poliovirus P3 Proteins: Interaction of Polymerase 3Dpolwith VPg and with Genetic Variants of 3AB

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Complete Protein Linkage Map of Poliovirus P3 Proteins: Interaction of Polymerase 3Dpolwith VPg and with Genetic Variants of 3AB

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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