2F36

Crystal Structure of the GluR5 Ligand Binding Core Dimer with Glutamate At 2.1 Angstroms Resolution

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1TXF	PDB 1TXf

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.1	293	1.75 M Ammonium Sulfate 100 mM HEPES 10 mM glutamic acid, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.2	44.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.694	α = 90
b = 73.784	β = 99.74
c = 115.918	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	CCD	MARRESEARCH		2004-10-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	0.99997	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	2.1	30	99.8	0.084	12.3	3.4	53310	53310	2.11	1

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	2.1	2.18	100		0.344	3.62

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 1TXf	2.11	29.87	53310	53310	6016	100	0.19124	0.19124	0.18562	0.24111	RANDOM	28.726

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]
-0.13		0.37	0.14		0.11

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.596
r_dihedral_angle_4_deg	13.914
r_dihedral_angle_3_deg	11.392
r_dihedral_angle_1_deg	2.689
r_mcangle_it	2.323
r_scangle_it	2.208
r_angle_refined_deg	1.839
r_mcbond_it	1.529
r_scbond_it	1.51
r_symmetry_hbond_refined	0.326
r_nbtor_refined	0.322
r_symmetry_vdw_refined	0.291
r_nbd_refined	0.238
r_xyhbond_nbd_refined	0.227
r_chiral_restr	0.144
r_bond_refined_d	0.016
r_gen_planes_refined	0.007
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8008
Nucleic Acid Atoms
Solvent Atoms	439
Heterogen Atoms	60

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing