Issue 36, 2020

Enzyme-responsive chiral self-sorting in amyloid-inspired minimalistic peptide amphiphiles

Abstract

Self-sorting is a spontaneous phenomenon that ensures the formation of complex yet ordered multicomponent systems and conceptualizes the design of artificial and orthogonally functional compartments. In the present study, we envisage chirality-mediated self-sorting in β-amyloid-inspired minimalistic peptide amphiphile (C10-L/D-VFFAKK)-based nanofibers. The fidelity and stereoselectivity of chiral self-sorting was ascertained by Förster resonance energy transfer (FRET) by the judicious choice of a pyrene (Py)-hydroxy coumarin (HOCou) donor–acceptor pair tethered to the peptide sequences. Seed-promoted elongation of the homochiral peptide amphiphiles investigated by AFM image analyses and Thioflavin-T (ThT) binding study further validated the chiral recognition of the L/D peptide nanofibers. Moreover, direct visualization of the chirality-driven self-sorted nanofibers is reported using super-resolution microscopy that exhibits enantioselective enzymatic degradation for L-peptide fibers. Such enantioselective weakening of the hydrogels may be used for designing stimuli-responsive orthogonal compartments for delivery applications.

Graphical abstract: Enzyme-responsive chiral self-sorting in amyloid-inspired minimalistic peptide amphiphiles

Supplementary files

Article information

Article type
Paper
Submitted
17 Jun 2020
Accepted
07 Aug 2020
First published
13 Aug 2020

Nanoscale, 2020,12, 18692-18700

Enzyme-responsive chiral self-sorting in amyloid-inspired minimalistic peptide amphiphiles

D. Gupta, R. Sasmal, A. Singh, J. P. Joseph, C. Miglani, S. S. Agasti and A. Pal, Nanoscale, 2020, 12, 18692 DOI: 10.1039/D0NR04581K

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