5v6k

Crystal Structure of the Second beta-Prism Domain of RbmC from V. cholerae Bound to N-acetylglucosaminyl-beta-1,2-mannose

spinqualitylabelsall models 5v6k, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5v6k is a 1 chain structure with sequence from Vibrio cholerae O1 biovar El Tor str. N16961. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: GOL, MAN, NAG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q9KTH2_VIBCH Publication Abstract from PubMed Vibrio cholerae is an aquatic gram-negative microbe responsible for cholera, a pandemic disease causing life-threatening diarrheal outbreaks in populations with limited access to health care. Like most pathogenic bacteria, V. cholerae secretes virulence factors to assist colonization of human hosts, several of which bind carbohydrate receptors found on cell-surfaces. Understanding how pathogenic virulence proteins specifically target host cells is important for the development of treatment strategies to fight bacterial infections. Vibrio cholerae cytolysin (VCC) is a secreted pore-forming toxin with a carboxy-terminal beta-prism domain that targets complex N-glycans found on mammalian cell-surface proteins. To investigate glycan selectivity, we studied the VCC beta-prism domain and two additional beta-prism domains found within the V. cholerae biofilm matrix protein RbmC. We show that the two RbmC beta-prism domains target a similar repertoire of complex N-glycan receptors as VCC and find through binding and modeling studies that a branched pentasaccharide core (GlcNAc2-Man3) represents the likely footprint interacting with these domains. To understand the structural basis of V. cholerae beta-prism selectivity, we solved high-resolution crystal structures of fragments of the pentasaccharide core bound to one RbmC beta-prism domain and conducted mutagenesis experiments on the VCC toxin. Our results highlight a common strategy for cell-targeting utilized by both toxin and biofilm matrix proteins in Vibrio cholerae and provide a structural framework for understanding the specificity for individual receptors. Our results suggest that a common strategy for disrupting carbohydrate interactions could affect multiple virulence factors produced by V. cholerae, as well as similar beta-prism domains found in other vibrio pathogens. Structural basis of mammalian glycan targeting by Vibrio cholerae cytolysin and biofilm proteins.,De S, Kaus K, Sinclair S, Case BC, Olson R PLoS Pathog. 2018 Feb 12;14(2):e1006841. doi: 10.1371/journal.ppat.1006841., eCollection 2018 Feb. PMID:29432487 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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