Experiment: 4IRW

Co-crystallization of streptavidin-biotin complex with a lanthanide-ligand complex gives rise to a novel crystal form

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	298	1.5 uL protein (pH 8.0) incubated with saturated biotin solution + 1.5 uL 200 mM Na3[Tb(Dpa)3] + 3 uL 60% v/v MPD, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.38	48.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.423	α = 90
b = 71.395	β = 90
c = 55.494	γ = 90

Symmetry
Space Group	C 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	93.15	IMAGE PLATE	RIGAKU RAXIS IV++		2011-08-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.5417

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	1.396	27.86	81.5	0.066	15.4	6.26		21044

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	1.396	1.45	22.9		0.377	1.8	2.08	583

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	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	SAD	1.396	27.859	21015	1957	79.56	0.1256	0.1226	0.1459	0.1536	0.1671	26.7835

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	8.92
f_angle_d	1.431
f_chiral_restr	0.077
f_bond_d	0.009
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	910
Nucleic Acid Atoms
Solvent Atoms	115
Heterogen Atoms	151

Software

Software
Software Name	Purpose
d*TREK	data scaling
d*TREK	data reduction
PHENIX	refinement
PDB_EXTRACT	data extraction
PHENIX	phasing