Experiment: 3U8M

Crystal structure of the acetylcholine binding protein (AChBP) from Lymnaea stagnalis in complex with NS3920 (1-(6-bromopyridin-3-yl)-1,4-diazepane)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1UW6	PDB ENTRY 1UW6: PENTAMER, CHAIN A-E

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8	293	50mM Tris, 1.9M Ammonium sulfate, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.77

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 233.057	α = 90
b = 268.453	β = 90
c = 73.259	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	100	CCD	MAR CCD 165 mm		2010-04-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I911-2		MAX II	I911-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.7	30.01	94.9	0.109	0.109	14.1	5.3		120656			29.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.7	2.85	98		0.38	0.38	2	5.4

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-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 1UW6: PENTAMER, CHAIN A-E	2.7	30.01	1.34	120656	2501	97.8	0.22	0.219	0.2139	0.275	0.2748	32.16

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]
-12.7398			16.8861		-4.1464

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	14.607
f_angle_d	1.053
f_chiral_restr	0.064
f_bond_d	0.008
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	32059
Nucleic Acid Atoms
Solvent Atoms	328
Heterogen Atoms	365

Software

Software
Software Name	Purpose
SCALA	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
PHASER	phasing