Loss of tRNA uridine thiolation affects mRNA translation, protein production, and metabolite accumulation in Arabidopsis.

Loss of U34 tRNA thiolation in Arabidopsis impairs decoding of AAA, GAA, and CAA codons, reducing protein production for genes enriched in these codons.

• Why it matters: Understanding how tRNA modifications influence translation and metabolism in plants can reveal mechanisms linking nutritional status to growth and pathogen interactions, which are less studied than in yeast and animals.
• What they did: Researchers used Arabidopsis thaliana to investigate the effects of losing U34 tRNA thiolation, examining impacts on codon decoding, protein levels, and metabolite accumulation, especially under sulfur limitation.
• The result: The absence of U34 thiolation alters protein levels involved in sulfur and amino acid metabolism, affects metabolite accumulation, and influences plant growth and interactions with bacteria, highlighting its role in linking nutrition to translation.