Ca(2+) modulating ?-synuclein membrane transient interactions revealed by solution NMR spectroscopy.
Related Articles Ca(2+) modulating ?-synuclein membrane transient interactions revealed by solution NMR spectroscopy.
Biochim Biophys Acta. 2013 Dec 4;
Authors: Zhang Z, Dai C, Bai J, Xu G, Liu M, Li C
Abstract
?-synuclein is involved in Parkinson's disease and its interaction with cell membrane is crucial to its pathological and physiological functions. Membrane properties, such as curvature, lipid composition have been shown to affect the interactions by various techniques, but ion effects on ?-synuclein membrane interactions remain elusive. Ca(2+) dynamic fluctuation in neurons plays important roles in the onset of Parkinson's disease and its influx is considered as one of the reasons to cause cell death. Using solution NMR spectroscopy, here we show that Ca(2+) can modulate ?-synuclein membrane interactions through competitive binding to anionic lipids, resulting in dissociation of ?-synuclein from membranes. These results suggest a negative modulatory effect of Ca(2+) on membrane mediated normal function of ?-synuclein, which may provide a clue, to their dysfunction in neurodegenerative disease.
PMID: 24316000 [PubMed - as supplied by publisher]
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