1US4

PUTATIVE GLUR0 LIGAND BINDING CORE WITH L-GLUTAMATE

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	5	291	VAPOUR DIFFUSION METHOD, 10 MG/ML OF PROTEIN SOLUTION WAS MIXED WITH RESERVOIR SOLUTION (20.3% PEG4000, 0.09M SODIUM CITRATE PH 5.0) AND EQUILIBRATED AGAINST RESERVOIR SOLUTION AT ROOM TEMPERATURE (291 K). CRYSTALS IN FORM OF PARALLELEPIPEDS WERE GROWN TO 0.05X0.05X0.15 MM WITHIN 10 DAYS. CRYOPROTECTANT CONTENT: 25% PEG4000, 18% ETHYLENE GLYCOL AND 0.1M SODIUM CITRATE PH 5.0.

Crystal Properties
Matthews coefficient	Solvent content
2.12	41.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.518	α = 90
b = 68.092	β = 90
c = 81.381	γ = 90

Symmetry
Space Group	P 21 21 21

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 IMAGE PLATE		2003-04-15	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL26B1	0.9, 0.9789, 0.9793	SPring-8	BL26B1

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	1.75	50	95.2	0.067	25.1	4.4		28082		-1	9.4

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	1.75	1.81	98		0.153	13.6

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	MAD	THROUGHOUT	1.75	28.91	50956	2440	91.5	0.178	0.178	0.206	RANDOM	13

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]
-1.75			0.28		1.47

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.6
c_scangle_it	4.88
c_scbond_it	3.53
c_mcangle_it	2.75
c_mcbond_it	2.08
c_angle_deg	1.3
c_improper_angle_d	0.8
c_bond_d	0.005
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2237
Nucleic Acid Atoms
Solvent Atoms	235
Heterogen Atoms	14

Software

Software
Software Name	Purpose
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing
ARP/wARP	phasing
CNS	refinement