2RTR

STREPTAVIDIN-2-IMINOBIOTIN COMPLEX, PH 4.0, SPACE GROUP I222

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		4		ROOM TEMPERATURE, PH 4.00. SYNTHETIC MOTHER LIQUOR OF 75% SATURATED AMMONIUM SULFATE, 25% 1.0 M POTASSIUM ACETATE ADJUSTED TO PH 4.0.

Crystal Properties
Matthews coefficient	Solvent content
2.16	23.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 95.41	α = 90
b = 106.54	β = 90
c = 48.31	γ = 90

Symmetry
Space Group	I 2 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray		IMAGE PLATE	RIGAKU			M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

Data Collection

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.62	1.69	62.2			2.8

Refinement

Statistics
Diffraction ID	Structure Solution 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	Mean Isotropic B
X-RAY DIFFRACTION		1.62	7.5	1.5	27936		91	0.189	0.189	0.234

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
x_dihedral_angle_d	27.2
x_angle_deg	3.3
x_bond_d	0.017
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1819
Nucleic Acid Atoms
Solvent Atoms	125
Heterogen Atoms	32

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
bioteX	data reduction
X-PLOR	phasing