1ZGC

Crystal Structure of Torpedo Californica Acetylcholinesterase in Complex With an (RS)-Tacrine(10)-Hupyridone Inhibitor.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1			277	PEG 200, pH 5.8, temperature 277K, VAPOR DIFFUSION, SITTING DROP. PROTEIN WAS CRYSTALLISED FROM 28-30% V/V PEG 200 0.5 M MES PH 5.8 AT 277K, WITHOUT SEEDING WITH MICROCRYSTALS; THEN SOAKED IN MOTHER LIQUOR (40% V/V PEG 200 IN 0.1 M MES BUFFER, PH 5.8) CONTAINING 4MM (RS)-(+/-)- TACRINE(10)-HUPYRIDONE ((5RS)-(+/-)-5-{[10-(1,2,3,4- TETRAHYDROACRIDIN-9-YLAMINO)DECYL]AMINO}5,6,7,8-TETRAHYDRO-QUINOLIN-2(1H)-ONE) BIS-OXALATE FOR 40 HOURS.

Crystal Properties
Matthews coefficient	Solvent content
2.99	58.84

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 90.996	α = 90
b = 105.543	β = 90
c = 150.448	γ = 90

Symmetry
Space Group	P 21 21 21

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 RAXIS IV	OSMIC BLUE CONFOCAL MIRRORS	2003-10-02	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	2.1	34.5	99.4	0.078	18.1	0.61		84805

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	2.1	2.16	98.5		0.396	3.83	9.8

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	2.1	34.5	80089	4157	99.2	0.199	0.196	0.247	RANDOM	24.2

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]
-1.46			3.46		-1.99

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	7.574
r_scangle_it	5.237
r_scbond_it	3.612
r_angle_refined_deg	2.506
r_mcangle_it	2.292
r_mcbond_it	1.406
r_angle_other_deg	1.246
r_symmetry_vdw_other	0.351
r_nbd_other	0.259
r_symmetry_vdw_refined	0.22
r_nbd_refined	0.214
r_chiral_restr	0.199
r_xyhbond_nbd_refined	0.14
r_symmetry_hbond_refined	0.116
r_nbtor_other	0.103
r_bond_refined_d	0.036
r_gen_planes_other	0.019
r_gen_planes_refined	0.017
r_bond_other_d	0.003
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8369
Nucleic Acid Atoms
Solvent Atoms	341
Heterogen Atoms	144

Software

Software
Software Name	Purpose
REFMAC	refinement
STRATEGY	data reduction
CCP4	data scaling
XTALVIEW	refinement