4YVB

Structure of D128N streptavidin

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	298	0.05 M HEPES, pH 7.5 with 7.5% PEG 8000

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.597	α = 90
b = 98.95	β = 112.58
c = 52.638	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	PIXEL	PSI PILATUS 6M		2011-01-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL12-2	1.0	SSRL	BL12-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	Rrim I (All)	Rpim I (All)	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	1.351	34.672	97	0.042	0.048	0.022	16.6	4.5	101243	101243

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Rpim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.35	1.42	93.9		1.096	1.096	0.564	0.7	4.5	14280

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	1MEP	1.351	33.97	101213	96132	5081	96.97	0.1289	0.1268	0.1702	RANDOM	16.922

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]
0.05		-0.03	-0.64		0.57

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.902
r_dihedral_angle_4_deg	15.639
r_dihedral_angle_3_deg	11.482
r_sphericity_free	10.829
r_sphericity_bonded	6.837
r_dihedral_angle_1_deg	6.801
r_scangle_it	5.87
r_mcangle_it	4.638
r_scbond_it	4.606
r_mcbond_it	3.611
r_mcbond_other	3.326
r_rigid_bond_restr	2.419
r_angle_refined_deg	1.77
r_angle_other_deg	0.991
r_chiral_restr	0.115
r_bond_refined_d	0.018
r_gen_planes_refined	0.009
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3569
Nucleic Acid Atoms
Solvent Atoms	407
Heterogen Atoms	64

Software

Software
Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data scaling
XDS	data reduction