RNA codon expansion platform enables precise protein engineering in mammalian cells

To overcome the inherent challenge of translation termination interference caused by stop codon reprogramming in mammalian cells, researchers from Peking University led by Chen Peng from College of Chemistry and Molecular Engineering and Yi Chengqi from School of Life Sciences have developed a novel codon expansion strategy that enables precise incorporation of noncanonical amino acids (ncAAs) without perturbing natural genetic codes.