2NS1

Crystal structure of the e. coli ammonia channel AMTB complexed with the signal transduction protein GLNK

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	293	20% PEG 550MME, 0.12M TRIS(HYDROXYMETHYL)AMINOMETHANE, 2mM ADENOSINE-5'-TRIPHOSPHATE, 25mM AMONIUM SULFATE, 0.04M B-OCTYLGLUCOSIDE, 2mM DITHIOTHREITOL, 0.05M SODIUM CHLORIDE, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.28	62.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 102.032	α = 90
b = 102.032	β = 90
c = 363.849	γ = 120

Symmetry
Space Group	H 3 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 4	SI(111)	2006-08-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	1.1159	ALS	8.3.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	1.962	43.07	98.9	0.083	41.2	7.2	53722	52357		2	32.4

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.962	2.03	93.4		0.611	2.1	4.2	4864

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1U7G and PDB ENTRY 2GNK	1.962	43.07	1	48839	48839	2562	97.47	0.16435	0.16248	0.19838	RANDOM	30.533

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]
0.12	0.06		0.12		-0.19

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.139
r_dihedral_angle_4_deg	16.037
r_dihedral_angle_3_deg	13.042
r_scangle_it	5.74
r_dihedral_angle_1_deg	5.505
r_mcangle_it	4.879
r_mcbond_it	4.458
r_scbond_it	4.359
r_angle_other_deg	1.49
r_angle_refined_deg	1.484
r_mcbond_other	1.261
r_symmetry_vdw_other	0.236
r_chiral_restr	0.224
r_nbd_refined	0.207
r_nbtor_refined	0.185
r_nbd_other	0.184
r_xyhbond_nbd_refined	0.17
r_symmetry_hbond_refined	0.169
r_symmetry_vdw_refined	0.154
r_nbtor_other	0.086
r_xyhbond_nbd_other	0.017
r_bond_refined_d	0.012
r_gen_planes_refined	0.005
r_bond_other_d	0.002
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3838
Nucleic Acid Atoms
Solvent Atoms	498
Heterogen Atoms	203

Software

Software
Software Name	Purpose
REFMAC	refinement
ADSC	data collection
HKL-2000	data reduction
SCALEPACK	data scaling
PHASER	phasing