3SZJ

Structure of the shwanavidin-biotin complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROBATCH		293	1.0M NaKPO4, pH range of 6.6-6.9, microbatch, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
1.99	38.14

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 42.725	α = 90
b = 56.031	β = 90
c = 86.62	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	ADSC QUANTUM 315r		2009-04-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1	0.875	ESRF	ID23-1

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	1.45	47.04	99.8				37616	1	1

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.45	47	35673	35673	1880	99.77	0.16344	0.16197	0.19	RANDOM	12.396

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]
-0.38			-0.01		0.39

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.206
r_dihedral_angle_3_deg	10.856
r_dihedral_angle_1_deg	6.648
r_dihedral_angle_4_deg	6.22
r_sphericity_free	4.438
r_scangle_it	3.319
r_sphericity_bonded	2.75
r_scbond_it	2.58
r_mcangle_it	1.795
r_angle_refined_deg	1.546
r_rigid_bond_restr	1.511
r_mcbond_it	1.209
r_symmetry_hbond_refined	0.461
r_nbtor_refined	0.302
r_nbd_refined	0.223
r_symmetry_vdw_refined	0.201
r_xyhbond_nbd_refined	0.137
r_chiral_restr	0.107
r_bond_refined_d	0.012
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1800
Nucleic Acid Atoms
Solvent Atoms	197
Heterogen Atoms	50

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling