Transfer RNA supplementation rescues HARS deficiency in a humanized yeast model of Charcot-Marie-Tooth Disease

Aminoacyl-tRNA synthetases are indispensable enzymes in all cells, ensuring the correct pairing of amino acids to their cognate tRNAs to maintain translational fidelity. Autosomal dominant mutations V133F and Y330C in histidyl-tRNA synthetase (HARS) cause the genetic disorder Charcot-Marie-Tooth type 2W (CMT2W). HARS V133F and Y330C cause mistranslation as validated by mass spectrometry and growth defects that persist with histidine supplementation. The growth defects and translation fidelity for both V133F and Y330C mutants were rescued by supplementation with human tRNAHis in a humanized yeast model.