De novo designed peptide and protein hairpins self‐assemble into sheets and nanoparticles

Johanna M. Galloway, Harriet E. V. Bray, Deborah K. Shoemark, Lorna R. Hodgson, Jennifer Coombs, Judith M. Mantell, Ruth S. Rose, James F. Ross, Caroline Morris, Robert L. Harniman, Christopher W. Wood, Christopher Arthur, Paul Verkade, Derek N. Woolfson

Research output: Contribution to journalArticlepeer-review

Abstract

The design and assembly of peptide‐based materials has advanced considerably, leading to a variety of fibrous, sheet, and nanoparticle structures. A remaining challenge is to account for and control different possible supramolecular outcomes accessible to the same or similar peptide building blocks. Here a de novo peptide system is presented that forms nanoparticles or sheets depending on the strategic placement of a “disulfide pin” between two elements of secondary structure that drive self‐assembly. Specifically, homodimerizing and homotrimerizing de novo coiled‐coil α‐helices are joined with a flexible linker to generate a series of linear peptides. The helices are pinned back‐to‐back, constraining them as hairpins by a disulfide bond placed either proximal or distal to the linker. Computational modeling indicates, and advanced microscopy shows, that the proximally pinned hairpins self‐assemble into nanoparticles, whereas the distally pinned constructs form sheets. These peptides can be made synthetically or recombinantly to allow both chemical modifications and the introduction of whole protein cargoes as required.
Original languageEnglish
Article number2100472
Number of pages11
JournalSmall
Early online date15 Feb 2021
DOIs
Publication statusE-pub ahead of print - 15 Feb 2021

Keywords

  • coiled coil
  • computational modeling
  • peptide design
  • protein design
  • self-assembly

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