3HI9

The x-ray crystal structure of the first RNA recognition motif (RRM1) of the AU-rich element (ARE) binding protein HuR at 2.0 angstrom resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	293	0.2 M Di-ammonium citrate, 20% w/v PEG 3350, 5% Glycerol, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.22	61.75

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.804	α = 90
b = 74.804	β = 90
c = 147.361	γ = 120

Symmetry
Space Group	P 31 2 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	CCD	MARMOSAIC 225 mm CCD		2006-06-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	1.00778	SLS	X10SA

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	2	30	99.3	0.096	7.9	3		32767		-3	33.895

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2	2.08	99.5		0.484	3.2	3	3709

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1FXL	2	29.76	32762	1639	99.3	0.199	0.197	0.232	RANDOM	32.295

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]
0.01	0.01		0.01		-0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.591
r_dihedral_angle_4_deg	15.798
r_dihedral_angle_3_deg	14.225
r_dihedral_angle_1_deg	5.276
r_scangle_it	4.815
r_scbond_it	2.769
r_mcangle_it	1.818
r_angle_refined_deg	1.361
r_mcbond_it	0.942
r_chiral_restr	0.095

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.591
r_dihedral_angle_4_deg	15.798
r_dihedral_angle_3_deg	14.225
r_dihedral_angle_1_deg	5.276
r_scangle_it	4.815
r_scbond_it	2.769
r_mcangle_it	1.818
r_angle_refined_deg	1.361
r_mcbond_it	0.942
r_chiral_restr	0.095
r_bond_refined_d	0.013
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2504
Nucleic Acid Atoms
Solvent Atoms	197
Heterogen Atoms

Software

Software
Software Name	Purpose
XSCALE	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection

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.