Experiment: 4BX5

cis-divalent streptavidin

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3RY1	PDB ENTRY 3RY1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		2.5 % W/V POLYETHYLENE GLYCOL (PEG) 1000, 12.5 % W/V PEG 3350, 12.5 % V/V MPD, 30 MM OF ETHYLENE GLYCOL MIX (DI-ETHYLENEGLYCOL, TRI-ETHYLENEGLYCOL, TETRA-ETHYLENEGLYCOL, PENTA-ETHYLENEGLYCOL) AND 0.1 M MES/IMIDAZOLE PH 6.5, CORRESPONDING TO CONDITION E4 OF THE MORPHEUS SCREEN

Crystal Properties
Matthews coefficient	Solvent content
2.12	41.44

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.22	α = 90
b = 84.24	β = 98.81
c = 58.25	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	CCD	MARRESEARCH 300MM		2012-03-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04-1		Diamond	I04-1

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	1.43	42.12	92.6	0.06	11.4	3.6		75108		2	14.65

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	1.43	1.48	91.6		0.58	2.21	3.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 3RY1	1.431	42.12	1.35	75104	3785	92.58	0.1614	0.1601	0.1685	0.1873	0.1962	22

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
f_dihedral_angle_d	11.858
f_angle_d	1.298
f_chiral_restr	0.081
f_bond_d	0.01
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3585
Nucleic Acid Atoms
Solvent Atoms	517
Heterogen Atoms	42

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing