Detection of transient interchain interactions in the intrinsically disordered protein alpha-synuclein by NMR paramagnetic relaxation enhancement.
NMR paramagnetic relaxation enhancement experiments were applied to the intrinsically disordered protein alpha-synuclein, the primary protein in Parkinson's disease, to directly characterize transient intermolecular complexes at neutral and low pH. At neutral pH, we observed weak N- to C-terminal interchain contacts driven by electrostatic interactions, while at low pH, the C- to C-terminal interchain interactions are significantly stronger and driven by hydrophobic contacts. Characterization of these first interchain interactions will provide fundamental insight into the mechanism of amyloid formation.
Wu
Kuen-Phon
KP
Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, New Jersey 08854, USA.
Baum
Jean
J
D008958:Models, Molecular; D019906:Nuclear Magnetic Resonance, Biomolecular; D011485:Protein Binding; D011487:Protein Conformation; D051844:alpha-Synuclein / Q000737:chemistry* / Q000378:metabolism*
D051844:alpha-Synuclein