1KC4

NMR Structural Analysis of the Complex Formed Between alpha-Bungarotoxin and the Principal alpha-Neurotoxin Binding Sequence on the alpha7 Subunit of a Neuronal Nicotinic Acetylcholine Receptor


SOLUTION NMR Experimental Data


Experimental Details
Sample Conditions
Sample Contents1.6 mM alpha-bungarotoxin/[U-15N]-alpha 7 19mer complex 30 mM sodium phosphate, pH 5.5 50 micromolar sodium azide 50 micromolar TMSP
Solvent95% H2O/5% D2O
Ionic Strengthn/a
pH5.5
Pressureambient
Temperature (K)308
Experiment(s):2D NOESY, 2D TOCSY, 3D_15N-separated_NOESY, 3D_15N-separated_TOCSY, 2D 1H-15N HSQC, HNHA
Spectrometer Information
Manufacturer Model Field Strength
Bruker Avance 400.0
Bruker Avance 600.0
NMR Refinement
Method distance geometry dynamical simulated annealing
Details RMS DEVIATIONS FROM IDEAL VALUES: BOND LENGTH(A) 0.0039, ANGLES(DEG) 0.61, IMPROPERS(DEG) 0.53
NMR Ensemble Information
Conformer Selection Criteria The submitted conformer models are the 10 with the lowest energy from a pool of over 100 accepted structures that had no restraint violations.
Conformers Submitted Total Number 10
Representative Model Choice Rationale
1 determined by nmrclust 1.2
Additional NMR Experimental Information
1 THE WELL-DEFINED REGIONS IN THE COMPLEX, EXHIBITING EXTENSIVE LONG RANGE NOES, ARE: BGTX: 1-16, 22-28, 39-48, AND 54-68 ALPHA 7 19MER: 185-194
Computation: NMR Software
# Classification Software Name Author
1 collection version: 2.1 XWINNMR --
2 processing version: 1.8 NMRPipe Delaglio, F., et al.
3 data analysis version: 3.87 Sparky Goddard, T.D. and Kneller, D.G.
4 refinement version: 1.0 CNS Brunger, A.T., et al.