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Related Experiment Video

Updated: Jul 4, 2026

Isolation of Fidelity Variants of RNA Viruses and Characterization of Virus Mutation Frequency

Isolation of Fidelity Variants of RNA Viruses and Characterization of Virus Mutation Frequency

Published on: June 16, 2011

Virus attenuation by genome-scale changes in codon pair bias.

J Robert Coleman¹, Dimitris Papamichail, Steven Skiena

¹Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, NY 11794, USA.

Science (New York, N.Y.)

|June 28, 2008

Summary

Scientists engineered poliovirus by altering codon pairs, slowing protein translation. This "death by a thousand cuts" strategy attenuated the virus, creating a potential vaccine candidate for protective immunity.

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Area of Science:

Genetics
Virology
Molecular Biology

Background:

The genetic code's redundancy allows multiple codon pairs to encode amino acids.
Species-specific codon pair bias influences the frequency of synonymous codon pair usage.
Understanding codon pair bias is crucial for synthetic biology and viral attenuation.

Purpose of the Study:

To investigate the impact of codon pair bias on viral protein translation and attenuation.
To develop a novel viral attenuation strategy using synonymous codon manipulation.
To assess the immunogenicity and protective efficacy of engineered poliovirus.

Main Methods:

De novo synthesis of large DNA molecules encoding poliovirus capsid protein with selected codon pairs.
Incorporation of overrepresented and underrepresented synonymous codon pairs.
Assessment of protein translation rates in engineered viruses.
In vivo studies in mice to evaluate viral attenuation and protective immunity.

Main Results:

Underrepresented codon pairs significantly decreased protein translation rates.
Engineered polioviruses with modified codon pairs exhibited attenuation in mice.
Customized polioviruses elicited protective immunity against subsequent viral challenge.
The strategy demonstrated potential for broad applicability in viral attenuation.

Conclusions:

Synonymous codon pair usage directly impacts protein translation speed and viral attenuation.
Codon pair bias manipulation offers a viable strategy for creating attenuated virus vaccine candidates.
The
death by a thousand cuts
approach shows promise for attenuating diverse viral pathogens.