A learning algorithm to discover soluble vesicle-binding helical peptides

Sharlene Denos, Eric Gotkowski, Martin Gruebele

Research output: Contribution to journalArticle

Abstract

Membrane peptide folding studies require peptides that bind to lipid vesicles while remaining water-soluble. Currently available peptides are either artificial designs, or they have membrane-disrupting antimicrobial or venomous activity. As a first step to derive new soluble membrane-binding peptides from naturally occurring membrane proteins, we trained a learning algorithm on several water-soluble and insoluble helical peptides by comparing its predictions with experimental solubility and fluorescence vesicle binding assays. The algorithm yielded an easily computed score S to discover soluble peptides in databases of transmembrane helical proteins. To validate the algorithm, we selected four helices based on a good S score. Experiments showed that all four are soluble at >25 M, and that three bind to vesicles. We illustrate with an example that the vesicle binding of such peptides can be temperature-tuned. Finally, we predict four additional peptides that should be water-soluble and able to bind to lipid vesicles.

Original languageEnglish (US)
Pages (from-to)4909-4914
Number of pages6
JournalJournal of Physical Chemistry B
Volume114
Issue number14
DOIs
StatePublished - Apr 15 2010

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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