Experiment: 4O3B

Crystal structure of an open/closed glua2 ligand-binding domain dimer at 1.91 A resolution

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1FTL	pdb entry 1FTL

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.5	279	20% PEG 4000, 0.1 M lithium sulfate and 0.1 M phosphate-citrate, pH 4.5, VAPOR DIFFUSION, HANGING DROP, temperature 279K

Crystal Properties
Matthews coefficient	Solvent content
2.44	49.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.72	α = 90
b = 93.72	β = 90
c = 97.14	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	CCD	MAR CCD 165 mm		2009-09-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I911-5	0.9081	MAX II	I911-5

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	1.91	27.96	98.1	0.049	19.8	3.7	44501	45335			16.71

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.91	2.01	92.1		0.083	0.083	11	3.3	5483

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1FTL	1.906	27.505	1.33	44448	2250	97.94	0.1397	0.1376	0.152	0.1782	0.19	RANDOM	20.881

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.995
f_angle_d	1.251
f_chiral_restr	0.077
f_bond_d	0.011
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4047
Nucleic Acid Atoms
Solvent Atoms	554
Heterogen Atoms	91

Software

Software
Software Name	Purpose
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
SCALA	data scaling