1CFJ

METHYLPHOSPHONYLATED ACETYLCHOLINESTERASE (AGED) OBTAINED BY REACTION WITH O-ISOPROPYLMETHYLPHOSPHONOFLUORIDATE (GB, SARIN)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6	277	35-40% (W/V) PEG-200 0.15 M MES BUFFER PH 6, 0.05 M NACL, 4 DEG C , temperature 277.0K

Crystal Properties
Matthews coefficient	Solvent content
3.8	68

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 111.395	α = 90
b = 111.395	β = 90
c = 136.623	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	BRANDEIS - B4		1997-07-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X12C		NSLS	X12C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	30	97.4	0.09	10.3	6.7		30011			40.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.6	2.69	99.3		0.17	2.2

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2ACE	2.6	30	28531	1497	93.2	0.186	0.247	RANDOM	32.5

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]
8.48	8.97		8.48		-16.9

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	24.2
x_scangle_it	5.34
x_scbond_it	4.01
x_mcangle_it	3.4
x_mcbond_it	2.27
x_angle_deg	2
x_improper_angle_d	1.29
x_bond_d	0.019
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4244
Nucleic Acid Atoms
Solvent Atoms	220
Heterogen Atoms	32

Software

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