2OZ9 | pdb_00002oz9

E. coli TRP holorepressor, orthorhombic crystal form

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1WRP	1wrp dimer

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	5	298	crystallization conditions: 2.5 M sodium phosphate, 0.6 M ammonium chloride, 2.5 mM L-tryptophan. Prior to data collection the crystal was equilibrated to 2.4 M ammonium sulfate, 0.4 M sodium chloride, 2.4 mM L-tryptophan, 50 mM sodium acetate., pH 5.0, VAPOR DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
1.93	36.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.3	α = 90
b = 53.6	β = 90
c = 33.1	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	FILM	KODAK	graphite monochromator		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ELLIOTT GX-6	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.65	20				10945	10945	2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	NONE	1wrp dimer	1.65	5	2	10699			0.18			17.284

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
p_angle_deg	2
p_bond_d	0.012

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	828
Nucleic Acid Atoms
Solvent Atoms	85
Heterogen Atoms	21

Software

Software
Software Name	Purpose
PROFFT	refinement
DENZO	data reduction
SCALEPACK	data scaling
MERLOT	phasing