2ZD9

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
5.29	76.75

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 283.287	α = 90
b = 283.287	β = 90
c = 103.507	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			2007-01-15	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	4	141.42					26095

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	4	141.42	26095	1324	99.59	0.308	0.307	0.333	RANDOM	142.676

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]
-12.14	-6.07		-12.14		18.21

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.727
r_dihedral_angle_3_deg	16.952
r_dihedral_angle_4_deg	11.778
r_dihedral_angle_1_deg	4.108
r_angle_refined_deg	0.931
r_nbtor_refined	0.295
r_metal_ion_refined	0.226
r_nbd_refined	0.197
r_symmetry_vdw_refined	0.155
r_xyhbond_nbd_refined	0.109
r_chiral_restr	0.053
r_bond_refined_d	0.006
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6696
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	5

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction