6GC5

Molecular basis for AU-rich element recognition and dimerization by the HuR C-terminal RRM

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	298	20 mM Tris (pH8), 100 mM NaCl, 10% (w/v) Glycerol, 1mM TCEP precipitant: 2 M Ammonium sulfate, 0.1 M Bis-Tris well

Crystal Properties
Matthews coefficient	Solvent content
2.23	44.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 151.287	α = 90
b = 40.258	β = 132.95
c = 106.496	γ = 90

Symmetry
Space Group	C 1 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	80	PIXEL	PSI PILATUS 6M		2014-10-06	M	SINGLE WAVELENGTH

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

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	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	1.9	77.95	95.1	0.04556	0.05447	0.999	15.23	3.4		35681

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.9	1.968	81.19		0.6683	0.854

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	3HI9	1.9	77.946	1.35	35638	1784	94.99	0.2023	0.2007	0.2312

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]
-9.7789		2.0232	17.0258		-7.2469

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	12.004
f_angle_d	1.216
f_chiral_restr	0.09
f_bond_d	0.015
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2320
Nucleic Acid Atoms	304
Solvent Atoms	191
Heterogen Atoms

Software

Software
Software Name	Purpose
XDS	data scaling
XDS	data reduction
PHASER	phasing
PHENIX	refinement
Coot	model building

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.