6CHY

STRUCTURE OF CHEMOTAXIS PROTEIN CHEY

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				18% PEG 3350 AND 0.2 M AMMONIUM SULFATE

Crystal Properties
Matthews coefficient	Solvent content
2.14	42.47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 95.78	α = 90
b = 76.7	β = 90
c = 32.64	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	80	CCD				M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X8C		NSLS	X8C

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	2.3		72.5	0.051				7861

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.33	2.45	43.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	MODIFIED WILD-TYPE CHEY	2.33	10	2	7698		72.5	0.185		11.04

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_transverse_tor	27.7
p_staggered_tor	20.9
p_planar_tor	2
p_mcangle_it	1.029
p_scangle_it	0.987
p_mcbond_it	0.605
p_scbond_it	0.586
p_xyhbond_nbd	0.275
p_multtor_nbd	0.251
p_singtor_nbd	0.2
p_chiral_restr	0.163
p_planar_d	0.049
p_angle_d	0.048
p_bond_d	0.014
p_plane_restr	0.011
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1951
Nucleic Acid Atoms
Solvent Atoms	177
Heterogen Atoms	5

Software

Software
Software Name	Purpose
MERLOT	phasing
PROFFT	refinement
MADNES	data reduction
MADNES	data scaling