1TQ3

Higher resolution crystal structure of the third PDZ domain of post synaptic PSD-95 protein

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.9	295	1.0 M sodium citrate, 0.1 M HEPES, pH 6.9, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.262	α = 90
b = 89.262	β = 90
c = 89.262	γ = 90

Symmetry
Space Group	P 41 3 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		2003-07-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 14-BM-C	1.0	APS	14-BM-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.89	28.23					10234

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.89	19.96	1	9630	485	98.82	0.23812	0.235	0.29575	RANDOM	38.398

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
r_dihedral_angle_1_deg	8.318
r_scangle_it	6.255
r_scbond_it	4.156
r_mcangle_it	2.78
r_angle_refined_deg	2.554
r_mcbond_it	1.675
r_angle_other_deg	1.154
r_symmetry_hbond_refined	0.362
r_symmetry_vdw_other	0.344
r_nbd_other	0.277
r_nbd_refined	0.241
r_xyhbond_nbd_refined	0.222
r_chiral_restr	0.154
r_symmetry_vdw_refined	0.126
r_nbtor_other	0.099
r_bond_refined_d	0.036
r_gen_planes_refined	0.013
r_bond_other_d	0.003
r_gen_planes_other	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	827
Nucleic Acid Atoms
Solvent Atoms	61
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
d*TREK	data scaling
XTALVIEW	refinement