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Title: Structural basis of typhoid: Salmonella typhi type IVb pilin (PilS) and cystic fibrosis transmembrane conductance regulator interaction
Authors: Balakrishna, A.M.
Saxena, A.M.
Mok, H.Y.-K. 
Swaminathan, K. 
Keywords: Complex X-ray crystal structure
Cystic fibrosis transmembrane conductance regulator (CFTR) peptide
Salmonella typhi
Type IVb pilin
Issue Date: 1-Nov-2009
Citation: Balakrishna, A.M., Saxena, A.M., Mok, H.Y.-K., Swaminathan, K. (2009-11-01). Structural basis of typhoid: Salmonella typhi type IVb pilin (PilS) and cystic fibrosis transmembrane conductance regulator interaction. Proteins: Structure, Function and Bioinformatics 77 (2) : 253-261. ScholarBank@NUS Repository.
Abstract: The type IVb pilus of the enteropathogenic bacteria Salmonella typhi is a major adhesion factor during the entry of this pathogen into gastrointestinal epithelial cells. Its target of adhesion is a stretch of 10 residues from the first extracellular domain of cystic fibrosis transmembrane conductance regulator (CFTR). The crystal structure of the N-terminal 25 amino acid deleted S. typhi native PilS protein (ΔPilS), which makes the pilus, was determined at 1.9 Å resolution by the multiwavelength anomalous dispersion method. Also, the structure of the complex of ΔPilS and a target CFTR peptide, determined at 1.8 Å, confirms that residues 113-117 (NKEER) of CFTR are involved in binding with the pilin protein and gives us insight on the amino acids that are essential for binding. Furthermore, we have also explored the role of a conserved disulfide bridge in pilus formation. The subunit structure and assembly architecture are crucial for understanding pilus functions and designing suitable therapeutics against typhoid. © 2009 Wiley-Liss, Inc.
Source Title: Proteins: Structure, Function and Bioinformatics
ISSN: 08873585
DOI: 10.1002/prot.22500
Appears in Collections:Staff Publications

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