6S5P

Cfucosylated peptide SBL2 bound to Fucose binding Lectin LecB (PA-IIL) from Pseudomonas aeruginosa at 1.46 Angstrom resolution

Summary for 6S5P

• Entry DOI: 10.2210/pdb6s5p/pdb
• Descriptor: Fucose-binding lectin, SBL2, CALCIUM ION, ... (5 entities in total)
• Functional Keywords: lectin, fucosylated, sugar binding protein
• Biological source: Pseudomonas aeruginosa; More
• Total number of polymer chains: 7
• Total formula weight: 50381.29

Authors

Baeriswyl, S.,Stocker, A.,Reymond, J.-L. (deposition date: 2019-07-02, release date: 2019-08-21, Last modification date: 2024-11-20)

Primary citation

Baeriswyl, S.,Gan, B.H.,Siriwardena, T.N.,Visini, R.,Robadey, M.,Javor, S.,Stocker, A.,Darbre, T.,Reymond, J.L.
X-ray Crystal Structures of Short Antimicrobial Peptides as Pseudomonas aeruginosa Lectin B Complexes.
Acs Chem.Biol., 14:758-766, 2019

PubMed Abstract: 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 α-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 α-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 α-helix amphiphilicity. Investigating N-terminal acylation led to AMPs with equivalent and partly stronger antibacterial effects compared to the free peptide.

PubMed: 30830745
DOI: 10.1021/acschembio.9b00047

Experimental method

X-RAY DIFFRACTION (1.46 Å)