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Title: NMR structure of a Type IVb pilin from Salmonella typhi and its assembly into pilus
Authors: Xu, X.-F.
Tan, Y.-W.
Lam, L.
Hackett, J.
Zhang, M.
Mok, Y.-K. 
Issue Date: 23-Jul-2004
Citation: Xu, X.-F., Tan, Y.-W., Lam, L., Hackett, J., Zhang, M., Mok, Y.-K. (2004-07-23). NMR structure of a Type IVb pilin from Salmonella typhi and its assembly into pilus. Journal of Biological Chemistry 279 (30) : 31599-31605. ScholarBank@NUS Repository.
Abstract: The structure of the N-terminal-truncated Type IVb structural pilin (t-PilS) from Salmonella typhi was determined by NMR. Although topologically similar to the recently determined x-ray structure of pilin from Vibrio cholerae toxin-coregulated pilus, the only Type IVb pilin with known structure, t-PilS contains many distinct structural features. The protein contains an extra pair of β-strands in the N-terminal αβ loop that align with the major β-strands to form a continuous 7-stranded antiparallel β-sheet. The C-terminal disulfide-bonded region of t-PilS is only half the length of that of toxin-coregulated pilus pilin. A model of S. typhi pilus has been proposed and mutagenesis studies suggested that residues on both the αβ loop and the C-terminal disulfide-bonded region of PilS might be involved in binding specificity of the pilus. This model structure reveals an exposed surface between adjacent subunits of PilS that could be a potential binding site for the cystic fibrosis transmembrane conductance regulator.
Source Title: Journal of Biological Chemistry
ISSN: 00219258
DOI: 10.1074/jbc.M404727200
Appears in Collections:Staff Publications

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