The interconversion of two secondary structure types (alpha-helix reversible beta-sheet) induced by external conditions such as pH, temperature, concentration, and solvent could be proved in a new class of amphiphilic peptides (switch peptides) in aqueous solution. The pH-dependent conformational changes were studied by CD spectroscopy. Special attention was given to the investigations of four newly synthesized peptides with similar sequences.
Pierre Vandergheynst, Felix Naef, Cédric Gobet, Francesco Craighero, Mohan Vamsi Nallapareddy
Anne-Florence Raphaëlle Bitbol, Damiano Sgarbossa, Umberto Lupo