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Solid State NMR Structure of the low-temperature form of the Pf1 Major Coat Protein in Magnetically Aligned Bacteriophage
SOLID-STATE NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
PISEMA
Approximately 50 mg/ml Pf1 bacteriophage, u-15N
5 mM sodium borate buffer
8
ambient
273
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AVANCE
750
NMR Refinement
Method
Details
Software
Determination of torsion angles between adjacent residues
using solid-state NMR frequencies
This is a backbone only model. Constant peptide plane
geometry was assumed. Torsion angles phi and psi were
allowed to vary within 10-20 degrees relative to phi=-65,
psi=-40. Radial and angular positioning of subunits in a
manner similar to and in comparison with structure 1PJF,
which involved minimization against published neutron
diffraction distance constraints and energy minimization
with sidechains using the program SCWRL.
NMRPipe
NMR Ensemble Information
Conformer Selection Criteria
structural fitting of PISEMA spectrum with fixed peptide plane geometry
Conformers Calculated Total Number
100
Conformers Submitted Total Number
27
Representative Model
1 (closest to the average)
Additional NMR Experimental Information
Details
MODEL 1 IS THE BASIC SOLID-STATE NMR STRUCTURE (NO
SIDECHAINS), WHILE MODELS 2-27 ARE IDENTICAL TRANSLATED
AND ROTATED COPIES OF MODEL 1 INCLUDED TO PRESENT THE
MODEL OF THE WHOLE BACTERIOPHAGE ASSEMBLY.