4HQP

Alpha7 nicotinic receptor chimera and its complex with Alpha bungarotoxin

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
4.82	74.49

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 142.15	α = 90
b = 142.15	β = 90
c = 518.135	γ = 120

Symmetry
Space Group	P 65 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	200	CCD	ADSC QUANTUM 315r			M	SINGLE WAVELENGTH
2	1	x-ray		CCD	MARMOSAIC 300 mm CCD
3	1	x-ray		CCD	MARMOSAIC 300 mm CCD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1	ALS	8.2.1
2	SYNCHROTRON	APS BEAMLINE 23-ID-B	1	APS	23-ID-B
3	SYNCHROTRON	APS BEAMLINE 21-ID-D	1	APS	21-ID-D

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	3.5	45.8					38979

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	MOLECULAR REPLACEMENT	THROUGHOUT	3.51	45.8	38979	3912	97.8	0.311	0.311	0.321	RANDOM	159.7

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]
22.74			22.74		-45.47

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	24.6
c_angle_deg	1
c_mcangle_it	0.75
c_improper_angle_d	0.73
c_mcbond_it	0.41
c_scangle_it	0.41
c_scbond_it	0.2
c_bond_d	0.004
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10980
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	112

Software

Software
Software Name	Purpose
CNS	refinement