Controlled micelle conjugation via charged peptide amphiphiles

Thien Van Truong, Mihir Ghosh, Basavaprabhu Hosamani, Thekke V. Baiju, Gunasekaran Dhandapani, Ellen Wachtel, Ellina Kesselman, Dganit Danino, Mordechai Sheves, Irishi N.N. Namboothiri, Guy Patchornik*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract. We report the first demonstration of nonionic detergent micelle conjugation and phase separation using purpose-synthesized, peptide amphiphiles, C10-(Asp)5 and C10-(Lys)5. Clustering is achieved in two different ways. Micelles containing the negatively charged peptide amphiphile C10-(Asp)5 are conjugated (a) via a water-soluble, penta-Lys mediator or (b) to micelles containing the C10-(Lys)5 peptide amphiphile. Both routes lead to phase separation in the form of oil-rich globules visible in the light microscope. The hydrophobic nature of these regions leads to spontaneous partitioning of hydrophobic dyes into globules that were found to be stable for weeks to months. Extension of the conjugation mechanism to micelles containing a recently discovered, light-driven proton pump King Sejong 1-2 (KS1-2) demonstrates that a membrane protein may be concentrated using peptide amphiphiles while preserving its native conformation as determined by characteristic UV absorption. The potential utility of these peptide amphiphiles for biophysical and biomedical applications is discussed.

Original languageEnglish
Article numbere3174
JournalJournal of Peptide Science
Volume25
Issue number6
DOIs
StatePublished - Jun 2019
Externally publishedYes

Keywords

  • amphiphile
  • conjugation
  • drug delivery
  • micelle
  • peptide

Fingerprint Dive into the research topics of 'Controlled micelle conjugation via charged peptide amphiphiles'. Together they form a unique fingerprint.

Cite this