The 1,3-diyne linker as a rigid "i,i+7" staple for α-helix stabilization: Stereochemistry at work.

J Pept Sci

Research Group of Organic Chemistry, Department of Chemistry and Department of Bioengineering Sciences, Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Brussels, Belgium.

Published: July 2019

Short alphahelical peptide sequences were stabilized through Glaser-Hay couplings of propargylated l- and/or d-serine residues at positions i and i+7. NMR analysis confirmed a full stabilization of the helical structure when a d-Ser (i), l-Ser (i+7) combination was applied. In case two l-Ser residues were involved in the cyclization, the helical conformation is disrupted outside the peptide's macrocycle.

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http://dx.doi.org/10.1002/psc.3194DOI Listing

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