1H22

Structure of acetylcholinesterase (E.C. 3.1.1.7) complexed with (S,S)-(-)-bis(10)-hupyridone at 2.15A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.8	277	PROTEIN WAS CRYSTALLISED FROM 28-30% V/V PEG 200 0.5M MES PH 5.8 AT 4 DEG. CELSIUS; THEN SOAKED IN MOTHER LIQUOR (40% V/V PEG 200 IN 0.1 M MES BUFFER, PH 5.8) CONTAINING 2MM (S,S)-(-)-BIS(10)-HUPYRIDONE DIHYDROCHLORIDE FOR ONE DAY.

Crystal Properties
Matthews coefficient	Solvent content
4.06	69.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 111.46	α = 90
b = 111.46	β = 90
c = 137.337	γ = 120

Symmetry
Space Group	P 31 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	120	IMAGE PLATE	RIGAKU IMAGE PLATE	OSMIC BLUE CONFOCAL MIRRORS	2001-01-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH3R

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	2.15	26.4	95.3	0.049	17.3	4.7		53982

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	2.15	2.23	96.8		0.228		10

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 2ACE	2.15	26.4	51401	2549	95	0.19	0.19	0.2214	RANDOM	34.244

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]
-7.141	-5.601		-7.141		14.283

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	3.03
c_scbond_it	2.209
c_angle_deg	1.94916
c_mcangle_it	1.819
c_mcbond_it	1.253
c_bond_d	0.022286
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
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4172
Nucleic Acid Atoms
Solvent Atoms	222
Heterogen Atoms	62

Software

Software
Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing