3RY1

Wild-type core streptavidin at atomic resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.5	298	52% MPD, pH 4.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.018	α = 90
b = 84.432	β = 98.81
c = 45.994	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	IMAGE PLATE	MARRESEARCH		2001-04-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.97	SSRL	BL9-1

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	1.03	47.46	97.4	0.037	27.227		206004	206004

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	1.03	1.05	99.8		0.222			10544

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	Isomorphous to previous structure	THROUGHOUT	1.03	47.46	209009	198537	10472	95.46	0.1178	0.1178	0.1169	0.135	RANDOM	13.428

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]
-0.16		0.04	0.36		-0.2

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.321
r_dihedral_angle_4_deg	15.078
r_dihedral_angle_3_deg	12.003
r_sphericity_free	10.035
r_dihedral_angle_1_deg	7.654
r_sphericity_bonded	5.662
r_scangle_it	5.002
r_scbond_it	3.784
r_mcangle_it	3.662
r_mcbond_other	2.701
r_mcbond_it	2.648
r_rigid_bond_restr	1.967
r_angle_refined_deg	1.818
r_angle_other_deg	1.257
r_chiral_restr	0.281
r_bond_refined_d	0.016
r_gen_planes_refined	0.01
r_gen_planes_other	0.004
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3625
Nucleic Acid Atoms
Solvent Atoms	576
Heterogen Atoms	80

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
Blu-Ice	data collection
Fc	phasing