High-resolution 3D structure determination of kaliotoxin by solid-state NMR spectroscopy.
High-resolution solid-state NMR spectroscopy can provide structural information of proteins that cannot be studied by X-ray crystallography or solution NMR spectroscopy. Here we demonstrate that it is possible to determine a protein structure by solid-state NMR to a resolution comparable to that by solution NMR. Using an iterative assignment and structure calculation protocol, a large number of distance restraints was extracted from (1)H/(1)H mixing experiments recorded on a single uniformly labeled sample under magic angle spinning conditions. The calculated structure has a coordinate precision of 0.6 A and 1.3 A for the backbone and side chain heavy atoms, respectively, and deviates from the structure observed in solution. The approach is expected to be applicable to larger systems enabling the determination of high-resolution structures of amyloid or membrane proteins.
Korukottu
Jegannath
J
Department for NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.
Schneider
Robert
R
Vijayan
Vinesh
V
Lange
Adam
A
Pongs
Olaf
O
Becker
Stefan
S
Baldus
Marc
M
Zweckstetter
Markus
M
D008958:Models, Molecular; D015394:Molecular Structure; D012604:Scorpion Venoms / Q000737:chemistry*
D012604:Scorpion Venoms; C072276:kaliotoxin