Distinct hydration properties of wild-type and familial point mutant A53T of α-synuclein associated with Parkinson's disease.
Biophys J
; 101(9): 2260-6, 2011 Nov 02.
Article
in En
| MEDLINE
| ID: mdl-22067166
ABSTRACT
The propensity of α-synuclein to form amyloid plays an important role in Parkinson's disease. Three familial mutations, A30P, E46K, and A53T, correlate with Parkinson's disease. Therefore, unraveling the structural effects of these mutations has basic implications in understanding the molecular basis of the disease. Here, we address this issue through comparing details of the hydration of wild-type α-synuclein and its A53T mutant by a combination of wide-line NMR, differential scanning calorimetry, and molecular dynamics simulations. All three approaches suggest a hydrate shell compatible with a largely disordered state of both proteins. Its fine details, however, are different, with the mutant displaying a somewhat higher level of hydration, suggesting a bias to more open structures, favorable for protein-protein interactions leading to amyloid formation. These differences disappear in the amyloid state, suggesting basically the same surface topology, irrespective of the initial monomeric state.
Full text:
1
Database:
MEDLINE
Main subject:
Parkinson Disease
/
Water
/
Point Mutation
/
Amino Acid Substitution
/
Mutant Proteins
/
Alpha-Synuclein
Type of study:
Risk_factors_studies
Limits:
Humans
Language:
En
Year:
2011
Type:
Article