1I5N

Crystal structure of the P1 domain of CheA from Salmonella typhimurium

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5	285	POLYETHYLENE GLYCOL 2000 MONOMETHYL ETHER, AMMONIUM SULFATE, SODIUM ACETATE, pH 5.0, VAPOR DIFFUSION, HANGING DROP, temperature 285K

Crystal Properties
Matthews coefficient	Solvent content
2.06	39.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.95	α = 90
b = 88.72	β = 90
c = 115.82	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MARRESEARCH		1999-09-18	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7A	0.9802, 0.9300, 0.9805	EMBL/DESY, Hamburg	BW7A

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	2.14	35.3	98.3	0.048	6.8	6.6	206627	31247			21.2

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)
	2.14	2.26	91.3		0.167		5.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	2.14	35.3	31179	31179	1548	98.3	0.212	0.212	0.21	0.248	RANDOM	23.6

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
c_dihedral_angle_d	17.6
c_scangle_it	4.5
c_scbond_it	3.44
c_mcangle_it	2.6
c_mcbond_it	1.9
c_angle_deg	1.1
c_improper_angle_d	0.79
c_bond_d	0.007
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4024
Nucleic Acid Atoms
Solvent Atoms	215
Heterogen Atoms	5

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
SOLVE	phasing
SHARP	phasing
AMoRE	phasing
CNS	refinement
CCP4	data scaling