3BEH

Structure of a Bacterial Cyclic Nucleotide Regulated Ion Channel

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6	298	PEG2000, pH 6.0, temperature 298K, VAPOR DIFFUSION, SITTING DROP

Crystal Properties
Matthews coefficient	Solvent content
5.37	77.09

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 282.73	α = 90
b = 282.73	β = 90
c = 105.46	γ = 120

Symmetry
Space Group	H 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray		CCD			2006-09-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X29A	1.08	NSLS	X29A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	3.1	48.45					56604

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.1	3.18

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		THROUGHOUT	3.1	48.45	56604	1970	99.31	0.276	0.276	0.286	RANDOM	61.192

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
r_dihedral_angle_2_deg	28.985
r_dihedral_angle_3_deg	15.606
r_dihedral_angle_4_deg	10.55
r_dihedral_angle_1_deg	3.881
r_angle_refined_deg	0.898
r_scangle_it	0.327
r_nbtor_refined	0.291
r_nbd_refined	0.18
r_scbond_it	0.176
r_symmetry_vdw_refined	0.131
r_mcangle_it	0.13
r_metal_ion_refined	0.126
r_xyhbond_nbd_refined	0.108
r_mcbond_it	0.069
r_chiral_restr	0.051
r_bond_refined_d	0.006
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6581
Nucleic Acid Atoms
Solvent Atoms	23
Heterogen Atoms	69

Software

Software
Software Name	Purpose
REFMAC	refinement
XSCALE	data scaling