Key Points
- To determine the genetic map and sequential gene order encoding poliovirus capsid proteins along the viral ribonucleic acid genome.
- Utilized pactamycin to selectively inhibit translation initiation and quantify differential synthesis of capsid proteins based on their distance from the initiation site.
- Performed pulse-labeling experiments terminated with emetine to evaluate the kinetics of radioactive precursor release from polyribosomes.
- Translation initiation inhibition with pactamycin altered capsid protein yields in direct relation to their proximity to the ribosomal initiation site.
- Both translation-inhibition and pulse-kinetic analyses consistently established the 5' to 3' poliovirus capsid protein gene order as VP4-VP2-VP3-VP1.
Structured PICO
PPopulationPoliovirus (in vitro model for mapping capsid proteins)
IInterventionPactamycin and emetine (used as pharmacological tools to inhibit protein synthesis)
OOutcomeGene order of the poliovirus capsid proteins
The study established the gene order of poliovirus capsid proteins as VP4-VP2-VP3-VP1 using translation inhibitors.