Experiment: 3SIO

Ac-AChBP ligand binding domain (not including beta 9-10 linker) mutated to human alpha-7 nAChR

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	Other		MODIFIED 2-BYR

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		4.6	298	0.1M Sodium Acetate, 0.02M Calcium Chloride, 30% 2-Methyl-2,4-Pentanediol, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.81	56.18

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 143.218	α = 90
b = 142.366	β = 90.02
c = 144.477	γ = 90

Symmetry
Space Group	C 1 2 1

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 315r		2010-05-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.2		ALS	8.2.2

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	2.3	50	99.8	0.113	0.113	25.048	6.8		126320		-3	34.55

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	2.3	2.34	98.7		0.552	0.552	2.81	6.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	MODIFIED 2-BYR	2.32	48.16	119855	119855	6075	95.9	0.184	0.182	0.178	0.23	0.2236	39

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]
-1.0095		-2.9511	7.1713		-4.5254

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	22.042
f_angle_d	1.383
f_chiral_restr	0.101
f_bond_d	0.009
f_plane_restr	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	17296
Nucleic Acid Atoms
Solvent Atoms	832
Heterogen Atoms	1054

Software

Software
Software Name	Purpose
CCP4	model building
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
CCP4	phasing