Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Isomerization of the Xaa‐Pro peptide bond induced by ionic interactions of arginine

Isomerization of the Xaa‐Pro peptide bond induced by ionic interactions of arginine Inclusion of Arg or Pro residues in proteins and peptides has been proved to play an essential role in biochemical functions through ionic interactions, conformational transitions, and formation of turns as well. In this study we present the conformational properties of the Ac‐Arg‐Ala‐Pro (1), Ac‐Arg‐Ala‐Pro‐NH2 (2), Ac‐Arg‐Pro‐Asp‐NH2 (3), and Ac‐Arg‐Pro‐Asp (4) tripeptides, using 1H‐nmr spectroscopy and molecular dynamics. These peptides were modeled with the aim of studying the role of the Arg‐guanidinium to carboxylate ionic interactions on the Xaa‐Pro peptide bond isomerization. It was found with 1 and 4 that arginine preferentially interacts with the C‐terminal carboxylate group, even though the β‐carboxylate is also accessible. This tendency of the Arg moiety was found to induce the cis disposition of the Ala‐Pro peptide bond in 1. It was also confirmed that the Arg…Asp side chain‐side chain ionic interaction in 3 plays a key role in backbone folding and structural stabilization through a type I β‐turn. The nmr pattern for 3 showed a remarkable similarity with that for various Arg‐Tyr‐Asp containing peptides, a sequence that is crucial for the adhesion properties of the Leishmania gp63 glycoprotein. © 1996 John Wiley & Sons, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biopolymers Wiley

Isomerization of the Xaa‐Pro peptide bond induced by ionic interactions of arginine

Loading next page...
 
/lp/wiley/isomerization-of-the-xaa-pro-peptide-bond-induced-by-ionic-rVYQGeGS6t

References (30)

Publisher
Wiley
Copyright
Copyright © 1996 Wiley Subscription Services
ISSN
0006-3525
eISSN
1097-0282
DOI
10.1002/(SICI)1097-0282(199606)38:6<673::AID-BIP1>3.0.CO;2-O
Publisher site
See Article on Publisher Site

Abstract

Inclusion of Arg or Pro residues in proteins and peptides has been proved to play an essential role in biochemical functions through ionic interactions, conformational transitions, and formation of turns as well. In this study we present the conformational properties of the Ac‐Arg‐Ala‐Pro (1), Ac‐Arg‐Ala‐Pro‐NH2 (2), Ac‐Arg‐Pro‐Asp‐NH2 (3), and Ac‐Arg‐Pro‐Asp (4) tripeptides, using 1H‐nmr spectroscopy and molecular dynamics. These peptides were modeled with the aim of studying the role of the Arg‐guanidinium to carboxylate ionic interactions on the Xaa‐Pro peptide bond isomerization. It was found with 1 and 4 that arginine preferentially interacts with the C‐terminal carboxylate group, even though the β‐carboxylate is also accessible. This tendency of the Arg moiety was found to induce the cis disposition of the Ala‐Pro peptide bond in 1. It was also confirmed that the Arg…Asp side chain‐side chain ionic interaction in 3 plays a key role in backbone folding and structural stabilization through a type I β‐turn. The nmr pattern for 3 showed a remarkable similarity with that for various Arg‐Tyr‐Asp containing peptides, a sequence that is crucial for the adhesion properties of the Leishmania gp63 glycoprotein. © 1996 John Wiley & Sons, Inc.

Journal

BiopolymersWiley

Published: Jan 1, 1996

There are no references for this article.