2D4U

Crystal Structure of the ligand binding domain of the bacterial serine chemoreceptor Tsr

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	7.5	293	15-20% PEG 10000, 0.1M Tris HCl, pH 7.5, VAPOR DIFFUSION, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.16	42.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 42.48	α = 90
b = 55.06	β = 93.73
c = 73.33	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	35	CCD	ADSC QUANTUM 315		2005-04-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL41XU	0.972	SPring-8	BL41XU

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.95	43.85	98.8	0.056		4	24764	24467

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.95	2.06	98.2		0.219	5.9	4.1

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 2lig	1.95	43.85	24453	23211	1242	98.52	0.21805	0.21805	0.21588	0.25854	RANDOM	37.558

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]
2.69		1.23			-2.53

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	18.764
r_scangle_it	4.778
r_dihedral_angle_1_deg	2.829
r_scbond_it	2.82
r_mcangle_it	1.707
r_angle_refined_deg	1.322
r_mcbond_it	0.914
r_xyhbond_nbd_refined	0.313
r_nbd_refined	0.263
r_symmetry_vdw_refined	0.22
r_symmetry_hbond_refined	0.217
r_chiral_restr	0.083
r_bond_refined_d	0.013
r_gen_planes_refined	0.006
r_bond_other_d
r_angle_other_deg
r_dihedral_angle_2_deg
r_dihedral_angle_4_deg
r_gen_planes_other
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2544
Nucleic Acid Atoms
Solvent Atoms	424
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
MOLREP	phasing