DUS3L (dihydrouridine synthase 3 like) catalyzes the synthesis of dihydrouridine, a modified nucleobase in cellular RNAs 1. The enzyme primarily modifies uridine at position 47 (U47) in the D-loop of cytoplasmic transfer RNAs (tRNAs) 1, and also mediates dihydrouridine formation in messenger RNAs (mRNAs) and long non-coding RNAs (lncRNAs) to regulate translation 1. DUS3L functions within the broader epitranscriptomic landscape of RNA modifications, which regulate RNA structure, folding, and protein-RNA interactions critical for gene expression 2. Functionally, DUS3L-knockout cells demonstrate compromised protein translation rates and impaired cellular proliferation, establishing the biological significance of dihydrouridine modifications 1. Beyond its established role in RNA modification, DUS3L has been identified as a candidate gene in disease contexts: it was implicated in familial inflammatory bowel disease as a carrier of potentially deleterious rare variants 3, and appears in integrated analyses of aortic aneurysm and dissection alongside genes involved in extracellular matrix organization and cellular adhesion 4. These disease associations suggest DUS3L may contribute to pathophysiological mechanisms beyond its primary tRNA modification function, though mechanistic connections require further investigation.