2BJ0

Crystal Structure of AChBP from Bulinus truncatus revals the conserved structural scaffold and sites of variation in nicotinic acetylcholine receptors

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		10.5		0.1 M CAPS PH10.5, 0.2 M LITHIUMSULFATE, 2 M AMMONIUM SULFATE, pH 10.50

Crystal Properties
Matthews coefficient	Solvent content
2.9	57.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 76.945	α = 90
b = 219.018	β = 90
c = 166.965	γ = 90

Symmetry
Space Group	C 2 2 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	CCD	ADSC CCD		2003-03-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4		ESRF	ID14-4

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	44.72	98	0.13	12	5.1		93560		1.7

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)
1	2	2.07	89		0.77	1.7	3.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1I9B	2	12	88439	4645	97.7	0.212	0.21	0.249	RANDOM	34.23

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]
3.91			-2.11		-1.8

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.107
r_dihedral_angle_4_deg	25.374
r_dihedral_angle_3_deg	15.954
r_dihedral_angle_1_deg	7.008
r_scangle_it	3.961
r_scbond_it	2.478
r_mcangle_it	1.846
r_angle_refined_deg	1.523
r_mcbond_it	1.112
r_symmetry_vdw_refined	0.238
r_nbd_refined	0.211
r_xyhbond_nbd_refined	0.159
r_symmetry_hbond_refined	0.139
r_chiral_restr	0.104
r_bond_refined_d	0.013
r_gen_planes_refined	0.006
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8050
Nucleic Acid Atoms
Solvent Atoms	424
Heterogen Atoms	56

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALEPACK	data scaling
AMoRE	phasing