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Targeting Insulin Amyloid Assembly by Aminosugars and Their Derivatives

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The use of small carbohydrates that stabilize proteins from misfolding is important from pharmaceutical point of view. We have investigated the role of small isomeric amino sugars on the in vitro aggregation of insulin amyloid. Using mass spectrometry, we screened 6 isomeric aminosugars for their role on inhibition of insulin amyloid formation and the results were compared with transmission electron microscopy imaging. We found that three N-acetylamino sugars promote insulin fibril formation. Among three isomeric aminosugars studied, only galactosamine showed few fibrils whereas other two isomers showed enhanced fibrils. The results demonstrated here may contribute to future designing of small amine derivatised galactose sugars as amyloid inhibitors and understanding their action.

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Keywords: Insulin; N-acetylhexosamines; amino sugars; amyloid; fibrils; mass spectrometry; transmission electron microscopy

Document Type: Research Article

Publication date: June 1, 2011

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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