6q8d | pdb_00006q8d

Structure of Fucosylated D-antimicrobial peptide SB15 in complex with the Fucose-binding lectin PA-IIL at 1.630 Angstrom resolution

spinqualitylabelsall models 6q8d, resolution 1.63Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6q8d is a 2 chain structure with sequence from "bacillus_aeruginosus"_(schroeter_1872)_trevisan_1885 "bacillus aeruginosus" (schroeter 1872) trevisan 1885. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, ZDC NonStd Res: DAL, DLE, DLY, DTY Related: 6q6w, 6q6x, 6q77, 6q79, 6q85, 6q86, 6q87 Gene: lecB, C0043_24310, C0044_25260, C0046_23510, CAZ10_21840, CW299_25270, DI492_13230, DT376_00595, PAERUG_E15_London_28_01_14_00983, PAMH19_1713, RW109_RW109_02453 ("Bacillus aeruginosus" (Schroeter 1872) Trevisan 1885) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Herein, we report X-ray crystal structures of 11-13 residue antimicrobial peptides (AMPs) active against Pseudomonas aeruginosa as complexes of fucosylated d-enantiomeric sequences with the P. aeruginosa lectin LecB. These represent the first crystal structures of short AMPs. In 24 individual structures of eight different peptides, we found mostly alpha-helices assembled as two-helix or four-helix bundles with a hydrophobic core and cationic residues pointing outside. Two of the analogs formed an extended structure engaging in multiple contacts with the lectin. Molecular dynamics (MD) simulations showed that alpha-helices are stabilized by bundle formation and suggested that the N-terminal acyl group present in the linker to the fucosyl group can extend the helix by one additional H-bond and increase alpha-helix amphiphilicity. Investigating N-terminal acylation led to AMPs with equivalent and partly stronger antibacterial effects compared to the free peptide. X-ray Crystal Structures of Short Antimicrobial Peptides as Pseudomonas aeruginosa Lectin B Complexes.,Baeriswyl S, Gan BH, Siriwardena TN, Visini R, Robadey M, Javor S, Stocker A, Darbre T, Reymond JL ACS Chem Biol. 2019 Mar 11. doi: 10.1021/acschembio.9b00047. PMID:30830745 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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