6QW4

Engineered streptavidin variant (ACGR) in complex with the Strep-tag II peptide

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	7.5	293	lithium sulfate, 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid

Crystal Properties
Matthews coefficient	Solvent content
2.62	53.02

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.16	α = 90
b = 57.16	β = 90
c = 175.08	γ = 90

Symmetry
Space Group	I 41 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	100	CCD	MARMOSAIC 225 mm CCD	Si mirror	2013-12-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.2	0.91841	BESSY	14.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	Rrim I (All)	Rpim I (All)	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	2.1	54.337	100	0.117	0.123	0.039	14.2	10		8934

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Rrim I (All)	Rpim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.21	100		0.36	0.36	0.379	0.117	2	10.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	1RST	2.1	36.72	8486	423	99.9	0.2018	0.2	0.2397	RANDOM	20.896

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]
0.19			0.19		-0.38

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	26.456
r_dihedral_angle_4_deg	19.702
r_dihedral_angle_3_deg	14.124
r_dihedral_angle_1_deg	7.875
r_angle_refined_deg	1.621
r_angle_other_deg	1.065
r_chiral_restr	0.082
r_bond_refined_d	0.013
r_gen_planes_refined	0.009
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	26.456
r_dihedral_angle_4_deg	19.702
r_dihedral_angle_3_deg	14.124
r_dihedral_angle_1_deg	7.875
r_angle_refined_deg	1.621
r_angle_other_deg	1.065
r_chiral_restr	0.082
r_bond_refined_d	0.013
r_gen_planes_refined	0.009
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	963
Nucleic Acid Atoms
Solvent Atoms	57
Heterogen Atoms	1

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.