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Protein & Peptide Letters

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General Review Article

Solvent Perturbation of Protein Structures - A Review Study with Lectins

Author(s): Pritha Mandal and Anisur R. Molla*

Volume 27, Issue 6, 2020

Page: [538 - 550] Pages: 13

DOI: 10.2174/0929866526666191104145511

Price: $65

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Abstract

Use of organic molecules as co-solvent with water, the ubiquitous biological solvent, to perturb the structure of proteins is popular in the research area of protein structure and folding. These organic co-solvents are believed to somehow mimic the environment near the cell membrane. Apart from that they induce non-native states which can be present in the protein folding pathway or those states also may be representative of the off pathway structures leading to amyloid formation, responsible for various fatal diseases. In this review, we shall focus on organic co-solvent induced structure perturbation of various members of lectin family. Lectins are excellent model systems for protein folding study because of its wide occurrence, diverse structure and versatile biological functions. Lectins were mainly perturbed by two fluoroalcohols – 2,2,2- trifluoroethanol and 1,1,1,3,3,3-hexafluoroisopropanol whereas glycerol, ethylene glycol and polyethylene glycols were used in some cases. Overall, all native lectins were denatured by alcohols and most of the denatured lectins have predominant helical secondary structure. But characterization of the helical states and the transition pathway for various lectins revealed diverse result.

Keywords: Lectins, solvent perturbation, trifluoroethanol, hexafluoroisopropanol, protein aggregation, secondary structure.

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