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Cysteines and Disulfide Bonds As Structure-Forming Units: Insights From Different Domains of Life and the Potential for Characterization by NMR

Overview
Journal Front Chem
Specialty Chemistry
Date 2020 May 12
PMID 32391319
Citations 55
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Abstract

Disulfide bridges establish a fundamental element in the molecular architecture of proteins and peptides which are involved e.g., in basic biological processes or acting as toxins. NMR spectroscopy is one method to characterize the structure of bioactive compounds including cystine-containing molecules. Although the disulfide bridge itself is invisible in NMR, constraints obtained via the neighboring NMR-active nuclei allow to define the underlying conformation and thereby to resolve their functional background. In this mini-review we present shortly the impact of cysteine and disulfide bonds in the proteasome from different domains of life and give a condensed overview of recent NMR applications for the characterization of disulfide-bond containing biomolecules including advantages and limitations of the different approaches.

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