Reference - Detail
| RRC ID | 81780 |
|---|---|
| Author | Miyauchi K, Kimura S, Akiyama N, Inoue K, Ishiguro K, Vu TS, Srisuknimit V, Koyama K, Hayashi G, Soma A, Nagao A, Shirouzu M, Okamoto A, Waldor MK, Suzuki T. |
| Title | A tRNA modification with aminovaleramide facilitates AUA decoding in protein synthesis. |
| Journal | Nat Chem Biol |
| Abstract |
Modified tRNA anticodons are critical for proper mRNA translation during protein synthesis. It is generally thought that almost all bacterial tRNAsIle use a modified cytidine-lysidine (L)-at the first position (34) of the anticodon to decipher the AUA codon as isoleucine (Ile). Here we report that tRNAsIle from plant organelles and a subset of bacteria contain a new cytidine derivative, designated 2-aminovaleramididine (ava2C). Like L34, ava2C34 governs both Ile-charging ability and AUA decoding. Cryo-electron microscopy structural analyses revealed molecular details of codon recognition by ava2C34 with a specific interaction between its terminal amide group and an mRNA residue 3'-adjacent to the AUA codon. These findings reveal the evolutionary variation of an essential tRNA modification and demonstrate the molecular basis of AUA decoding mediated by a unique tRNA modification. |
| Published | 2024-9-19 |
| DOI | 10.1038/s41589-024-01726-x |
| PII | 10.1038/s41589-024-01726-x |
| PMID | 39300229 |
| IF | 12.587 |
| Resource | |
| Arabidopsis / Cultured plant cells, genes | rpc00001 |