2FJ1

Crystal Structure Analysis of Tet Repressor (class D) in Complex with 7-Chlortetracycline-Nickel(II)

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.2	293	1.58 M Ammonium sulphate, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.937	α = 90
b = 68.937	β = 90
c = 180.893	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	277	IMAGE PLATE	MARRESEARCH		1997-01-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR571	1.5418

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	2.2	64.5	97.6	0.06	16.4	4.5	10706	10706			32.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.2	2.258			0.268	3.2		751

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 2TCT	2.2	64.55	10706	10706	544	97.62	0.14942	0.14942	0.14638	0.2147	RANDOM	33.999

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]
0.78			0.78		-1.55

RMS Deviations
Key	Refinement Restraint Deviation
r_scangle_it	6.745
r_dihedral_angle_1_deg	6.039
r_scbond_it	4.094
r_mcangle_it	3.042
r_angle_refined_deg	2.464
r_mcbond_it	1.609
r_angle_other_deg	1.146
r_symmetry_vdw_other	0.312
r_nbd_other	0.252
r_symmetry_hbond_refined	0.245
r_nbd_refined	0.242
r_symmetry_vdw_refined	0.24
r_xyhbond_nbd_refined	0.195
r_chiral_restr	0.167
r_nbtor_other	0.113
r_bond_refined_d	0.034
r_gen_planes_refined	0.014
r_gen_planes_other	0.01
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1641
Nucleic Acid Atoms
Solvent Atoms	102
Heterogen Atoms	37

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345	data collection
SCALEPACK	data scaling