Effect of osmolytes on the conformation and aggregation of some amyloid peptides: CD spectroscopic data

Mohammed Inayathullah; Jayakumar Rajadas

doi:10.1016/j.dib.2016.04.070

Effect of osmolytes on the conformation and aggregation of some amyloid peptides: CD spectroscopic data

Data Brief. 2016 May 4:7:1643-51. doi: 10.1016/j.dib.2016.04.070. eCollection 2016 Jun.

Authors

Mohammed Inayathullah¹, Jayakumar Rajadas²

Affiliations

¹ Biomaterials and Advanced Drug Delivery Laboratory, School of Medicine, Stanford University, Palo Alto, CA 94304, USA; Bioorganic and Neurochemistry Laboratory, Central Leather Research Institute, Adyar, Chennai, Tamilnadu 600020, India; Cardiovascular Pharmacology Division, Cardiovascular Institute, School of Medicine, Stanford University, Stanford, CA 94305, USA.
² Biomaterials and Advanced Drug Delivery Laboratory, School of Medicine, Stanford University, Palo Alto, CA 94304, USA; Cardiovascular Pharmacology Division, Cardiovascular Institute, School of Medicine, Stanford University, Stanford, CA 94305, USA.

Abstract

Protein misfolding and aggregation are responsible for a large number of diseases called protein conformational diseases or disorders that include Alzheimer׳s disease, Huntington׳s diseases, Prion related encephalopathies and type-II diabetes (http://dx.doi.org/10.1038/35041139) (Kopito and Ron, 2000) [1]. A variety of studies have shown that some small organic molecules, known as osmolytes have the ability to stabilize native conformation of proteins and prevent misfolding and aggregation (http://www.la-press.com/article.php?article_id=447) (Zhao et al., 2008) [2]. It has been shown that certain short segment or fragment of respective proteins can also form amyloids, and the segments also promote the aggregation in the full-length protein (http://dx.doi.org/10.2174/0929867023369187) (Gazit, 2002) [3]. This article presents circular dichroism spectroscopic data on conformational analysis and effect of osmolytes on Aβ peptide fragments, different lengths of polyglutamine peptide and the amyloidogenic segment of islet amyloid polypeptide.

Keywords: Aggregation; Amyloid β-protein; Circular dichroism; Conformation; Islet amyloid polypeptide; Osmolytes; Peptides; Polyglutamine.