2I0B

Crystal structure of the GluR6 ligand binding core ELKQ mutant dimer at 1.96 Angstroms Resolution

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.2	293	Reservoir: 1.5 M Ammonium Sulfate, 0.1 M NaCl, 0.1 M HEPES. 0.015 M Na Acetate; Protein: 12-22 mg/ml, 10 mM L-glutamate, 20 mM NaCl, 1 mM EDTA, pH 7.0, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.75	55.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 94.215	α = 90
b = 94.215	β = 90
c = 219.836	γ = 90

Symmetry
Space Group	P 43 21 2

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	MARRESEARCH		2005-04-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1.00000	APS	22-ID

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	1.96	29.79	99.92	0.058	13	6.5	68095	68095	1	1	30.4

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)
1	1.96	2.03	100		0.452	3.8	6.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 17SY	1.96	30	68095	68095	3668	99.98	0.17404	0.17404	0.17208	0.21055	RANDOM	30.993

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]
-0.41			-0.41		0.82

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.72
r_dihedral_angle_4_deg	13.367
r_dihedral_angle_3_deg	12.182
r_dihedral_angle_1_deg	3.545
r_scangle_it	2.73
r_mcangle_it	2.369
r_scbond_it	1.824
r_angle_refined_deg	1.671
r_mcbond_it	1.602
r_nbtor_refined	0.323

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.72
r_dihedral_angle_4_deg	13.367
r_dihedral_angle_3_deg	12.182
r_dihedral_angle_1_deg	3.545
r_scangle_it	2.73
r_mcangle_it	2.369
r_scbond_it	1.824
r_angle_refined_deg	1.671
r_mcbond_it	1.602
r_nbtor_refined	0.323
r_symmetry_hbond_refined	0.282
r_nbd_refined	0.228
r_xyhbond_nbd_refined	0.222
r_symmetry_vdw_refined	0.213
r_chiral_restr	0.126
r_bond_refined_d	0.015
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6094
Nucleic Acid Atoms
Solvent Atoms	538
Heterogen Atoms	35

Software

Software
Software Name	Purpose
REFMAC	refinement
SERGUI	data collection
MAR345	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	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.