Solution structure of a core peptide derived from scyllatoxin

Mark D. Pagel, David E. Wemmer

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

An analysis of the sequences of scyllatoxin and charybdotoxin suggested that it would be possible to design a core peptide sequence which would still fold to give the β‐hairpin and helix seen in the toxins, but which would eliminate one disulfide and connecting residues. The core sequence was modeled, then synthesized and purified. The cysteines oxidize in air to give the same disulfide pairings as seen in the parent toxins as the major product. The three‐dimensional structure of the core sequence peptide, termed Max, was determined using proton NMR spectroscopy and found to be identical in secondary structure to the toxins. However differences were found in the relative orientation of the β‐hairpin and helix. The use of this structural motif, found in many insect toxins, as a disulfide framework for exploring sequence/structure/activity relationships is discussed. © 1994 John Wiley & Sons, Inc.

Original languageEnglish (US)
Pages (from-to)205-215
Number of pages11
JournalProteins: Structure, Function, and Bioinformatics
Volume18
Issue number3
DOIs
StatePublished - Mar 1994

Keywords

  • NMR
  • distance geometry
  • disulfide framework
  • insect toxins
  • peptide folding

ASJC Scopus subject areas

  • Structural Biology
  • Biochemistry
  • Molecular Biology

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