Experiment: 9CST

Streptavidin-E101Q-K121A bound to Cu(II)-biotin-ethyl-dipicolylamine cofactor

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2QCB

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4	293	ammonium sulfate, sodium acetate

Crystal Properties
Matthews coefficient	Solvent content
2.33	47.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.82	α = 90
b = 57.82	β = 90
c = 184.139	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	PIXEL	DECTRIS EIGER2 S 16M		2024-03-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL12-2	0.8856	SSRL	BL12-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	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	1.13	42.09	99.7	0.764	0.08369	0.946	60.09	79.7		58555			13.62

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.13	1.172	99.88		3.208	3.229	0.3621	0.784	2.15

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	FREE R-VALUE	1.13	42.09	1.34	58555	5620	99.69	0.1425	0.1415	0.1415	0.1604	0.1604	20.09

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	8.1498
f_angle_d	1.4735
f_chiral_restr	0.1061
f_plane_restr	0.0198
f_bond_d	0.0143

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	924
Nucleic Acid Atoms
Solvent Atoms	129
Heterogen Atoms	37

Software

Software
Software Name	Purpose
MOSFLM	data reduction
Aimless	data scaling
PHASER	phasing
PHENIX	refinement