Transferred nuclear Overhauser effect spectroscopy study of a peptide from the PapG pilus subunit bound by the Escherichia coli PapD chaperone

Björn Walse, Jan Kihlberg, Katarina Flemmer Karlsson, Mikael Nilsson, Karl Gustav Wahlund, Jerome S. Pinkner, Scott J. Hultgren, Torbjörn Drakenberg

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5 Scopus citations

Abstract

Interaction of the Escherichia coli PapD chaperone with the synthetic peptide PapG308-314 (Thr-Met-Val-Leu-Ser-Phe-Pro), corresponding to the seven C-terminal residues of the PapG pilus subunit, was studied by transferred nuclear Overhauser effect (TRNOE) spectroscopy. The observation of cross-peaks corresponding to either intraresidue or sequential C(α)H/NH and C(β)H/NH TRNOEs and the absence of sequential NH(i)/NH(i+1) TROEs indicate that the peptide binds to PapD in an extended conformation. In addition, line-broadening effects gave information of the peptide's mode of interaction with PapD. These observations were in excellent agreement with a recent crystal structure of a PapG peptide complexed with PapD.

Original languageEnglish
Pages (from-to)115-120
Number of pages6
JournalFEBS Letters
Volume412
Issue number1
DOIs
StatePublished - Jul 21 1997

Keywords

  • NMR
  • P pili
  • PapD chaperone
  • Protein-peptide interaction
  • Transferred NOE

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