Journal
BIOPOLYMERS
Volume 83, Issue 3, Pages 226-232Publisher
WILEY
DOI: 10.1002/bip.20550
Keywords
alpha-synuclein; circular dichroism; g-factor; aggregation; GAV motif; FTIR
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alpha-Synuclein (alpha-Syn) has been identified as a component of intracellular fibrillar deposits in Parkinson's disease. Though the real pathogenesis is still unknown, many investigations have revealed that conformational alteration and fibril formation of alpha-Syn protein have an important role in causing the disease. In this work, we introduced the g-factor spectra of solid-state circular dichroism to estimate the secondary structure contents of alpha-Syn fragments in amyloids. Fourier-transform infrared (FTIR) was also applied to confirm the structural formation. The results suggest that the central hydrophobic region is critical for beta-sheet formation and the conformational alteration is the foundation of protein abnormal aggregation. The research provides a practical approach to estimate the secondary structure contents of protein amyloids and further insight into the relevance of structural transformation and amyloidogenesis. (c) 2006 Wiley Periodicals, Inc.
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