Codons mapping to the same amino acid are functionally interchangeable
the verdict
REFUTED
the evidence says no
confidence 3/100
Codons mapping to the same amino acid are not functionally interchangeable; synonymous codon choice significantly impacts translation kinetics, protein folding, and cellular fitness.
Evidence against · 3
A slight mismatch between a gene's codon usage and the cellular tRNA supply is beneficial.
2026 · cited by 2
Demonstrates that synonymous codons are not functionally interchangeable because a slight mismatch with tRNA supply affects bacterial growth rates and fitness.
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More against · 2
Mapping the inter- and intra-genic codon-usage landscape in <i>Homo sapiens</i>.
2026 · cited by 2
Shows that codon usage bias acts as a functional constraint influencing mRNA stability, translation kinetics, and protein folding rather than mere silent variation.
Native CFTR codon bias controls translation rate to balance off-pathway aggregation and channel function by conformational imprinting.
2025 · cited by 2
Establishes that native codon usage dictates translation rates via pauses that are critical for proper protein folding, meaning synonymous substitutions alter protein structure and function.