Codon usage regulates protein structure and function by affecting translation elongation speed in Drosophila cells

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Codon usage bias is prevalent in all genomes and influences translation.
• While codon optimality affects translation speed in fungi, its role in animals remains unclear.

Purpose of the Study:

• To investigate the effect of codon usage on mRNA translation elongation speed in animal systems.
• To determine if codon optimality influences ribosome movement and protein folding.

Main Methods:

• Utilized a Drosophila cell-free translation system to measure mRNA translation velocity.
• Analyzed ribosome movement and stalling on mRNA based on codon usage.

Main Results:

• Optimal synonymous codons were found to accelerate translation elongation.
• Non-optimal codons were observed to slow down translation and affect ribosome dynamics.
• Codon usage impacts protein structure and function in vitro and in vivo.

Conclusions:

• Codon usage-dependent translation elongation speed is a conserved mechanism in eukaryotes, from fungi to animals.
• This mechanism influences protein folding and function in eukaryotic organisms.