9TEY
DalDro bound to the terminating Escherichia coli 70S ribosome
This is a non-PDB format compatible entry.
Summary for 9TEY
| Entry DOI | 10.2210/pdb9tey/pdb |
| EMDB information | 55847 |
| Descriptor | Large ribosomal subunit protein bL33, 30S ribosomal protein S6, fully modified isoform, 30S ribosomal protein S7, ... (58 entities in total) |
| Functional Keywords | daldro, dal2, drosocin, pramp, translation, inhibitor, termination, ncpet, ribosome, cryo-em, antibiotic |
| Biological source | Escherichia coli BW25113 More |
| Total number of polymer chains | 56 |
| Total formula weight | 2247041.30 |
| Authors | |
| Primary citation | Huang, W.,Berger, M.J.,Safdari, H.A.,Klepacki, D.,Paternoga, H.,Baliga, C.,Wilson, D.N.,Vazquez-Laslop, N.,Mankin, A.S. Flipping antimicrobial peptides in the exit tunnel of the bacterial ribosome. Nat Commun, 17:-, 2026 Cited by PubMed Abstract: Proline-rich antimicrobial peptides (PrAMPs) kill bacteria by binding in the ribosomal nascent peptide exit tunnel. Type II PrAMPs bind in an orientation matching that of the nascent protein, trap the release factors and arrest ribosomes at stop codons. Conversely, Type I PrAMPs bind in an opposite orientation: their N-terminus invades the peptidyl transferase center arresting translation at start codons. Here, by mining the genome databases, we identify a number of PrAMPs with high sequence similarity to the Type II PrAMP Drosocin. Notably, many of the new PrAMPs do not stall ribosomes at stop codons, but act as Type I PrAMPs arresting translation at start codons. Structural analysis shows that such peptides bind with a Type I orientation. Minimal alterations in the peptide structure can flip the orientation of the PrAMP in the exit tunnel, switching the mechanism of translation inhibition. Altering the mode of binding and action of a PrAMP by only few mutations could be exploited by the host to combat newly emerging bacterial pathogens. PubMed: 42236475DOI: 10.1038/s41467-026-74007-x PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (3.11 Å) |
Structure validation
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