3B81

Crystal structure of predicted DNA-binding transcriptional regulator of TetR/AcrR family (NP_350189.1) from Clostridium acetobutylicum at 2.10 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		277	NANODROP, 25.0% Ethylene glycol, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.03	59.41

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.967	α = 90
b = 89.967	β = 90
c = 70.274	γ = 90

Symmetry
Space Group	P 42 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	100	CCD	ADSC QUANTUM 315		2007-10-05	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.2	0.9798, 0.9537, 0.9796	ALS	8.2.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.1	29.988	100	0.089	0.089	6	6.5		17429

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.15	100		0.983	0.983	0.7	6.8	1282

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	2.1	29.988	17389	882	99.9	0.204	0.203	0.234	RANDOM	41.914

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]
-1.65			-1.65		3.29

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.353
r_dihedral_angle_4_deg	20.909
r_dihedral_angle_3_deg	11.533
r_scangle_it	7.034
r_scbond_it	4.707
r_dihedral_angle_1_deg	3.409
r_mcangle_it	3.054
r_mcbond_it	1.621
r_angle_refined_deg	1.514
r_angle_other_deg	1.298
r_mcbond_other	0.329
r_nbd_refined	0.176
r_nbtor_refined	0.159
r_symmetry_vdw_other	0.135
r_symmetry_vdw_refined	0.128
r_nbd_other	0.124
r_chiral_restr	0.098
r_xyhbond_nbd_refined	0.096
r_symmetry_hbond_refined	0.089
r_nbtor_other	0.072
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
r_bond_other_d	0.003
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1468
Nucleic Acid Atoms
Solvent Atoms	82
Heterogen Atoms	13

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
SCALA	data scaling
PDB_EXTRACT	data extraction
ADSC	data collection
MOSFLM	data reduction
SHELXD	phasing
SHARP	phasing