Next Article in Journal
Inroads to Predict in Vivo Toxicology—An Introduction to the eTOX Project
Previous Article in Journal
Increasing the X-ray Diffraction Power of Protein Crystals by Dehydration: The Case of Bovine Serum Albumin and a Survey of Literature Data
Previous Article in Special Issue
Unraveling the Early Events of Amyloid-β Protein (Aβ) Aggregation: Techniques for the Determination of Aβ Aggregate Size
Int. J. Mol. Sci. 2012, 13(3), 3801-3819; doi:10.3390/ijms13033801

The Effect of Osmolytes on Protein Fibrillation

1 iNANO, Center for Insoluble Protein Structures (inSPIN), Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, DK-8000 Aarhus C, Denmark 2 Hochschule Biberach, Pharmaceutical Biotechnology, Hubertus-Liebrecht-Str. 35, D-88400 Biberach, Germany Present address: Zealand Pharma A/S, Smedeland 36, 2600 Glostrup, Denmark.
* Author to whom correspondence should be addressed.
Received: 9 February 2012 / Revised: 10 March 2012 / Accepted: 13 March 2012 / Published: 21 March 2012
(This article belongs to the Special Issue Protein Aggregation)
View Full-Text   |   Download PDF [413 KB, uploaded 19 June 2014]   |   Browse Figures


Osmolytes are small molecules that are exploited by cells as a protective system against stress conditions. They favour compact protein states which makes them stabilize globular proteins in vitro and promote folding. Conversely, this preference for compact states promotes aggregation of unstructured proteins. Here we combine a brief review of the effect of osmolytes on protein fibrillation with a report of the effect of osmolytes on the unstructured peptide hormone glucagon. Our results show that osmolytes either accelerate the fibrillation kinetics or leave them unaffected, with the exception of the osmolyte taurine. Furthermore, the osmolytes that affected the shape of the fibrillation time profile led to fibrils with different structure as revealed by CD. The structural changes induced by Pro, Ser and choline-O-sulfate could be due to specific osmolytes binding to the peptides, stabilizing an otherwise labile fibrillation intermediate.
Keywords: glucagon; amyloid; taurine; polymorphism; fibrillation mechanism glucagon; amyloid; taurine; polymorphism; fibrillation mechanism
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
MDPI and ACS Style

Macchi, F.; Eisenkolb, M.; Kiefer, H.; Otzen, D.E. The Effect of Osmolytes on Protein Fibrillation. Int. J. Mol. Sci. 2012, 13, 3801-3819.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here


Cited By

[Return to top]
Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert