1ZN5

Solid State NMR Structure of the low-temperature form of the Pf1 Major Coat Protein in Magnetically Aligned Bacteriophage

SOLID-STATE NMR

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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.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	data analysis	NMRPipe	2.2
2	data analysis	Felix	2000.1
3	structure solution	Matlab scripts	1.0	Nevzorov A.A., Opella, S.J.
4	refinement	SCWRL		Bower et al.