6CRO

CRYSTAL STRUCTURE OF LAMBDA-CRO BOUND TO A CONSENSUS OPERATOR AT 3.0 ANGSTROM RESOLUTION

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.9	293	CRO PROTEIN WAS SUSPENDED IN 20MM SODIUM CACODYLATE PH6.9 THEN MIXED WITH A 30% EXCESS OF THE 19BP DNA FRAGMENT. THE COMPLEX WAS THEN MIXED WITH AN EQUAL VOLUME OF PRECIPITANT SOLUTION (70MM AMMONIUM SULFATE, 13% PEG3350) AND ALLOWED TO EQUILIBRATE VIA THE HANGING DROP METHOD AT ROOM TEMPERATURE. COCRYSTALS TYPICALLY TAKE 3-4 MONTHS TO APPEAR., vapor diffusion - hanging drop, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.3	47.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 102.97	α = 90
b = 102.97	β = 90
c = 102.97	γ = 90

Symmetry
Space Group	I 21 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	295	AREA DETECTOR	SDMS	COLLIMATOR	1993-02-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	3	20	99.9	0.072		17.7	3758	3758			40.8

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MIR, WITH SUBSEQUENT MOLECULAR REPLACEMENT	TRUNCATED VERSION OF THE PREVIOUS LOW-RESOLUTION COMPLEX STRUCTURE	3	20	3758	3758		99.9	0.194

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
t_dihedral_angle_d	23.244
t_angle_deg	2.587
t_it	1.811
t_nbd	0.033
t_gen_planes	0.016
t_bond_d	0.014
t_trig_c_planes	0.011
t_incorr_chiral_ct
t_pseud_angle

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	472
Nucleic Acid Atoms	814
Solvent Atoms	7
Heterogen Atoms	5

Software

Software
Software Name	Purpose
VERIFY	model building
EDPDB	model building
TNT	refinement
SDMS	data reduction
SDMS	data scaling
VERIFY	phasing
EDPDB	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.