Non-proteinogenic (np) amino acids in the food chain present challenges for the human translation machinery. Here the authors show that, while AlaRS and ProRS activate toxic np azetidine-2-carboxylic acid (Aze) present in sugar beets and lilies, only the AlaRS editing system rejects Aze.
- Youngzee Song
- Huihao Zhou
- Paul Schimmel
