1XOK

crystal structure of alfalfa mosaic virus RNA 3'UTR in complex with coat protein N terminal peptide

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	295	2.45M ammonium sulfate, 0.01M magnesium acetate, 0.01M mes, 0.001M samarium chloride, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.1	α = 90
b = 123	β = 90
c = 53.6	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	CUSTOM-MADE		2003-08-10	M	MAD
2	1	x-ray	100	CCD	CUSTOM-MADE		2003-08-10	M	SINGLE WAVELENGTH
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID	0.91942, 0.91997, 0.92181	APS	19-ID
2	SYNCHROTRON	APS BEAMLINE 19-ID	0.91942	APS	19-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1,2	3	99	99.4	0.085	25	11.9	3508	3487

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1,2	3	3.19	98.1		0.405	4.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	3	20	0.001	3237	3236	326	99.97	0.251	0.251	0.249	0.26888	RANDOM	45.218

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
-3.42			6.93		-3.51

RMS Deviations
Key	Refinement Restraint Deviation
r_scangle_it	2.229
r_angle_refined_deg	2.118
r_mcangle_it	1.761
r_scbond_it	1.392
r_mcbond_it	0.849
r_symmetry_vdw_refined	0.313
r_symmetry_hbond_refined	0.307
r_nbd_refined	0.237
r_xyhbond_nbd_refined	0.202
r_chiral_restr	0.091

RMS Deviations
Key	Refinement Restraint Deviation
r_scangle_it	2.229
r_angle_refined_deg	2.118
r_mcangle_it	1.761
r_scbond_it	1.392
r_mcbond_it	0.849
r_symmetry_vdw_refined	0.313
r_symmetry_hbond_refined	0.307
r_nbd_refined	0.237
r_xyhbond_nbd_refined	0.202
r_chiral_restr	0.091
r_dihedral_angle_1_deg	0.027
r_bond_refined_d	0.013
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	244
Nucleic Acid Atoms	765
Solvent Atoms	7
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SHARP	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.