首页   按字顺浏览 期刊浏览 卷期浏览 Oxidative folding and preparation of α‐conotoxins for use in high‐throughput structure–...
Oxidative folding and preparation of α‐conotoxins for use in high‐throughput structure–activity relationship studies

 

作者: Reena Gyanda,   Jayati Banerjee,   Yi‐Pin Chang,   Angela M. Phillips,   Lawrence Toll,   Christopher J. Armishaw,  

 

期刊: Journal of Peptide Science  (WILEY Available online 2013)
卷期: Volume 19, issue 1  

页码: 16-24

 

ISSN:1075-2617

 

年代: 2013

 

DOI:10.1002/psc.2467

 

关键词: conotoxin folding;disulfide bonds;high‐throughput purification;combinatorial chemistry

 

数据来源: WILEY

 

摘要:

α‐Conotoxins are peptide neurotoxins that selectively inhibit various subtypes of nicotinic acetylcholine receptors. They are important research tools for studying numerous pharmacological disorders, with profound potential for developing drug leads for treating pain, tobacco addiction, and other conditions. They are characterized by the presence of two disulfide bonds connected in a globular arrangement, which stabilizes a bioactive helical conformation. Despite extensive structure–activity relationship studies that have produced α‐conotoxin analogs with increased potency and selectivity towards specific nicotinic acetylcholine receptor subtypes, the efficient production of diversity‐oriented α‐conotoxin combinatorial libraries has been limited by inefficient folding and purification procedures. We have investigated the optimized conditions for the reliable folding of α‐conotoxins using simplified oxidation procedures for use in the accelerated production of synthetic combinatorial libraries of α‐conotoxins. To this end, the effect of co‐solvent, redox reagents, pH, and temperature on the proportion of disulfide bond isomers was determined for α‐conotoxins exhibiting commonly known Cys loop spacing frameworks. In addition, we have developed high‐throughput ‘semi‐purification’ methods for the quick and efficient parallel preparation of α‐conotoxin libraries for use in accelerated structure–activity relationship studies. Our simplified procedures represent an effective strategy for the preparation of large arrays of correctly folded α‐conotoxin analogs and permit the rapid identification of active hits directly from high‐throughput pharmacological screening assays. Copyright © 2012 Europea

 

点击下载:  PDF (758KB)



返 回