✍ Scribed by Mark S. Searle
No coin nor oath required. For personal study only.
β‐Hairpin peptides (two anti‐parallel strands linked by a reverse β‐turn) have emerged as the simplest systems for probing weak interactions in β‐sheet folding. We describe a model 16‐residue hairpin system (peptide β1: KKYTVSIN****GKKITVSI) designed around the anti‐parallel β‐sheet DNA binding motif of the Met repressor dimer in which two β‐strand sequences are linked through an Asn‐Gly type I′ β‐turn. The peptide is significantly folded in aqueous solution and has a well‐defined conformation as evident from an abundance of NOE data. We review a number of analogues of β**1** designed to estimate the energetic contribution of electrostatic (ion pairing) interactions to hairpin stability, to examine effects of cooperativity and preorganization in determining the energetics of weak interactions, and examine the effects on stability and conformation of incorporation of a three‐histidine motif on one face of the hairpin capable of zinc complexation. © 2004 Wiley Periodicals, Inc. Biopolymers (Pept Sci), 2004
📜 SIMILAR VOLUMES
The solid-phase synthesis and characterization of a series of of the reverse-turn mimic. In N-acetylated tetrapeptide mimics incorporating the two different bicyclic lactams (a peptides (3-9), containing reverse-turn mimetic bicyclic lactams (1a, 1b), was reported in the preceding paper. The series