2C5F

Torpedo californica acetylcholinesterase in complex with a non hydrolysable substrate analogue, 4-oxo-N,N,N-trimethylpentanaminium

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6	277	32% PEG200, 150MM MES, PH6, 4 DEG. C, pH 6.00

Crystal Properties
Matthews coefficient	Solvent content
3.39	63.47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 112.26	α = 90
b = 112.26	β = 90
c = 137	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	CCD	MARRESEARCH		2002-03-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM30A		ESRF	BM30A

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	2.6	20	97.8	0.08	16.12	5.98		30595		3	42.6

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	2.6	2.7	97		0.3	5.92	5.59

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 1EA5	2.6	20	30590	1560	98.2	0.1626	0.1626	0.2195	RANDOM	49.3

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]
-10.267	-5.185		-10.267		20.535

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.5
c_scangle_it	3.04
c_mcangle_it	2.06
c_scbond_it	2.05
c_angle_deg	1.33526
c_mcbond_it	1.26
c_bond_d	0.007373
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
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4245
Nucleic Acid Atoms
Solvent Atoms	824
Heterogen Atoms	78

Software

Software
Software Name	Purpose
CNS	refinement
XDS	data reduction
XSCALE	data scaling
CNS	phasing