D-amino acid aminotransferase1 regulates grain chalkiness in rice by modulating endoplasmic reticulum stress response - PubMed
5 days ago
- #rice grain quality
- #D-amino acid aminotransferase
- #endoplasmic reticulum stress
- OsDAAT1, a rice D-amino acid aminotransferase, regulates grain chalkiness by modulating endoplasmic reticulum stress response.
- OsDAAT1 is highly expressed in rice vascular tissue and interconverts D-amino acids in vitro.
- Mutation in OsDAAT1 elevates D-alanine levels, altering peptide/protein isomerization and triggering ER stress, leading to chalky grains.
- OsDAAT1Hap1 is identified as a low-chalkiness haplotype, suggesting selection during rice domestication.
- Findings highlight a novel role for D-amino acid metabolism in plants and potential for improving rice grain quality.