Experiment: 3K9B

Crystal structure of human liver carboxylesterase 1 (hCE1) in covalent complex with the nerve agent Cyclosarin (GF)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1MX1	PDB entry 1MX1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	295	10% PEG 3350, 0.3 M Li2SO4, 0.1 M Citrate pH 5.5, 0.1 M NaCl, 0.1 M LiCl, 5% Glycerol, VAPOR DIFFUSION, SITTING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.86	56.93

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.61	α = 90
b = 179.88	β = 90
c = 200.06	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	100	CCD	MAR CCD 165 mm		2008-03-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1.0000	APS	22-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	3.1	48	97.5	0.131	0.131	13.6	7	37436	36488		2.1	53.94

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	3.1	3.2	94.5		0.481	0.481	4.5	6.2	2206

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1MX1	3.1	48	4.5	36488	36488	3643	97.5	0.2697	0.2697	0.266	0.2672	0.299	0.2996	Random	49.194

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]
-9.642			11.399		-1.758

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_deg	1.704
c_bond_d	0.014

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11155
Nucleic Acid Atoms
Solvent Atoms	66
Heterogen Atoms	30

Software

Software
Software Name	Purpose
XSCALE	data scaling
MOLREP	phasing
CNS	refinement
PDB_EXTRACT	data extraction
XDS	data scaling
XDS	data reduction