8AM9
Cryo-EM structure of the proline-rich antimicrobial peptide drosocin bound to the elongating ribosome
This is a non-PDB format compatible entry.
Summary for 8AM9
| Entry DOI | 10.2210/pdb8am9/pdb |
| Related | 8AKN |
| EMDB information | 15488 15523 |
| Related PRD ID | PRD_002425 |
| Descriptor | 50S ribosomal protein L33, 30S ribosomal protein S5, 30S ribosomal protein S6, fully modified isoform, ... (61 entities in total) |
| Functional Keywords | e.coli, 70s, drosocin, dro1, antimicrobial peptide, proline-rich, pramp, initiator trna, elongation, ribosome, leucine trna |
| Biological source | Drosophila melanogaster (fruit fly) More |
| Total number of polymer chains | 56 |
| Total formula weight | 2203313.42 |
| Authors | Koller, T.O.,Morici, M.,Wilson, D.N. (deposition date: 2022-08-03, release date: 2023-03-08, Last modification date: 2025-03-12) |
| Primary citation | Koller, T.O.,Morici, M.,Berger, M.,Safdari, H.A.,Lele, D.S.,Beckert, B.,Kaur, K.J.,Wilson, D.N. Structural basis for translation inhibition by the glycosylated drosocin peptide. Nat.Chem.Biol., 19:1072-1081, 2023 Cited by PubMed Abstract: The proline-rich antimicrobial peptide (PrAMP) drosocin is produced by Drosophila species to combat bacterial infection. Unlike many PrAMPs, drosocin is O-glycosylated at threonine 11, a post-translation modification that enhances its antimicrobial activity. Here we demonstrate that the O-glycosylation not only influences cellular uptake of the peptide but also interacts with its intracellular target, the ribosome. Cryogenic electron microscopy structures of glycosylated drosocin on the ribosome at 2.0-2.8-Å resolution reveal that the peptide interferes with translation termination by binding within the polypeptide exit tunnel and trapping RF1 on the ribosome, reminiscent of that reported for the PrAMP apidaecin. The glycosylation of drosocin enables multiple interactions with U2609 of the 23S rRNA, leading to conformational changes that break the canonical base pair with A752. Collectively, our study reveals novel molecular insights into the interaction of O-glycosylated drosocin with the ribosome, which provide a structural basis for future development of this class of antimicrobials. PubMed: 36997646DOI: 10.1038/s41589-023-01293-7 PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (2.8 Å) |
Structure validation
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