4GGT

Structure of apo Bradavidin2 (Form B)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROBATCH	3	293	1 uL drop of 3.4 mg/mL protein in 0.5 M acetic acid, pH 3.0, with 0.12 M magnesium formate, diffraction parameters improved with later addition of 0.1 M sodium bromide, MICROBATCH, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.48	50.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 34.771	α = 106.59
b = 46.118	β = 106.92
c = 46.449	γ = 106.82

Symmetry
Space Group	P 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	DECTRIS PILATUS 6M		2011-04-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29	0.98	ESRF	ID29

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	1.693	50	86			23010	23010

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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3EW1	1.693	40.66	21850	21850	1159	85.42	0.21473	0.21229	0.25972	RANDOM	26.69

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]
0.6	-0.16	-1.48	-1.02	-1.22	-1.23

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.351
r_dihedral_angle_4_deg	22.716
r_dihedral_angle_3_deg	18.539
r_dihedral_angle_1_deg	7.177
r_scangle_it	3.94
r_scbond_it	2.721
r_mcangle_it	1.853
r_angle_refined_deg	1.677
r_mcbond_it	1.073
r_nbtor_refined	0.32
r_symmetry_vdw_refined	0.301
r_nbd_refined	0.244
r_symmetry_hbond_refined	0.224
r_xyhbond_nbd_refined	0.161
r_chiral_restr	0.147
r_bond_refined_d	0.014
r_gen_planes_refined	0.007
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1644
Nucleic Acid Atoms
Solvent Atoms	135
Heterogen Atoms

Software

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