Solution structure of a core peptide derived from scyllatoxin

Mark "Marty" Pagel, D. E. Wemmer

Research output: Contribution to journalArticle

11 Citations (Scopus)

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.

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

Fingerprint

Disulfides
Peptides
Charybdotoxin
Structure-Activity Relationship
Nuclear magnetic resonance spectroscopy
Cysteine
Sequence Analysis
Insects
Protons
Magnetic Resonance Spectroscopy
Air
leiurotoxin I

Keywords

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

ASJC Scopus subject areas

  • Biochemistry
  • Genetics
  • Structural Biology

Cite this

Solution structure of a core peptide derived from scyllatoxin. / Pagel, Mark "Marty"; Wemmer, D. E.

In: Proteins: Structure, Function and Genetics, Vol. 18, No. 3, 1994, p. 205-215.

Research output: Contribution to journalArticle

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