3lek | pdb_00003lek

Lectin Domain of Lectinolysin complexed with Lewis B Antigen

spinqualitylabelsall models 3lek, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3lek is a 1 chain structure with sequence from Atcc 49456. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, NI, FUC, GAL, NDG Related: 3leo, 3leg, 3lei Gene: samhpaf (ATCC 49456) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The cholesterol-dependent cytolysins (CDCs) punch holes in target cell membranes through a highly regulated process. Streptococcus mitis lectinolysin (LLY) exhibits another layer of regulation with a lectin domain that enhances the pore-forming activity of the toxin. We have determined the crystal structures of the lectin domain by itself and in complex with various glycans that reveal the molecular basis for the Lewis antigen specificity of LLY. A small-angle X-ray scattering study of intact LLY reveals the molecule is flat and elongated with the lectin domain oriented so that the Lewis antigen-binding site is exposed. We suggest that the lectin domain enhances the pore-forming activity of LLY by concentrating toxin molecules at fucose-rich sites on membranes, thus promoting the formation of prepore oligomers on the surface of susceptible cells. Structure of the lectin regulatory domain of the cholesterol-dependent cytolysin lectinolysin reveals the basis for its lewis antigen specificity.,Feil SC, Lawrence S, Mulhern TD, Holien JK, Hotze EM, Farrand S, Tweten RK, Parker MW Structure. 2012 Feb 8;20(2):248-58. PMID:22325774 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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