5EI5

Crystal structure of MSF-aged Torpedo californica Acetylcholinesterase in complex with alkylene-linked bis-tacrine dimer (7 carbon linker)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1EA5

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		277	MES 100 mM, pH 6.2 PEG 200 30%

Crystal Properties
Matthews coefficient	Solvent content
3.98	69.13

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 111.28	α = 90
b = 111.28	β = 90
c = 136.74	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	100	PIXEL	DECTRIS PILATUS 2M		2015-02-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ELETTRA BEAMLINE 5.2R	1	ELETTRA	5.2R

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	48.23	99.2	0.217	5.4	5		54256

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	2.21	99.6		0.339	3.4	5

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	1EA5	2.1	48.23	54256	2898	99.2	0.175	0.173	0.206	RANDOM	28.83

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]
0.87	0.87		0.87		-2.81

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.895
r_dihedral_angle_4_deg	19.117
r_dihedral_angle_3_deg	15.105
r_long_range_B_refined	8.673
r_long_range_B_other	8.289
r_dihedral_angle_1_deg	6.647
r_scangle_other	5.71
r_scbond_it	3.818
r_scbond_other	3.817
r_mcangle_other	3.207
r_mcangle_it	3.205
r_mcbond_it	2.447
r_mcbond_other	2.429
r_angle_refined_deg	2.053
r_angle_other_deg	1.077
r_chiral_restr	0.154
r_bond_refined_d	0.02
r_gen_planes_refined	0.011
r_bond_other_d	0.003
r_gen_planes_other	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4263
Nucleic Acid Atoms
Solvent Atoms	364
Heterogen Atoms	97

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing