4R3H

The crystal structure of an apo RNA binding protein

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	293	25% PEG3350, 0.2M Ammonium Sulphate, 0.1M bis-tris, pH 6.5, vapor diffusion, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.3	45.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 39.264	α = 90
b = 103.026	β = 105.86
c = 41.585	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS		2014-03-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.8	27.31	99.1	0.086	10.9	3.6		28931

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.8	1.84	90.3		0.901	0.574	1.7	3.3	1528

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MIR	THROUGHOUT	1.9	25	24951	1007	99.63	0.193	0.1909	0.24	THIN SHELLS (SFTOOLS)	32.1817

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]
0.8		0.86	-1.01		-0.24

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.688
r_dihedral_angle_4_deg	16.973
r_dihedral_angle_3_deg	12.366
r_dihedral_angle_1_deg	6.242
r_mcangle_it	2.446
r_mcbond_it	1.634
r_mcbond_other	1.633
r_angle_refined_deg	1.338
r_angle_other_deg	0.761
r_chiral_restr	0.082
r_bond_refined_d	0.014
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2427
Nucleic Acid Atoms
Solvent Atoms	158
Heterogen Atoms	16

Software

Software
Software Name	Purpose
Aimless	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction