2G7E

The 1.6 A crystal structure of Vibrio cholerae extracellular endonuclease I

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	293	25% PEG 4000, 0.1 M Na acetate pH 4.6, 0.3 M ammonium acetate, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.03	39.47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.52	α = 90
b = 64.16	β = 90
c = 75.57	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	IMAGE PLATE	MARRESEARCH		2005-07-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM1A	0.873	ESRF	BM1A

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	1.6	25.384	100	0.055	0.055	9.1	4.5		26728	2	2	16.34

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)
	1.6	1.69	100	100	0.389	0.389	1.9	4.6	3846

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1ouo	1.6	25.38	26747	26725	1344	99.92	0.224	0.224	0.222	0.255	RANDOM	17.676

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]
			-0.02		0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.96
r_dihedral_angle_3_deg	13.706
r_dihedral_angle_4_deg	12.857
r_dihedral_angle_1_deg	9.053
r_scangle_it	3.256
r_scbond_it	2.258
r_angle_refined_deg	1.486
r_mcangle_it	1.396
r_mcbond_it	0.88
r_nbtor_refined	0.305
r_nbd_refined	0.207
r_symmetry_vdw_refined	0.191
r_xyhbond_nbd_refined	0.147
r_symmetry_hbond_refined	0.131
r_chiral_restr	0.101
r_bond_refined_d	0.013
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1722
Nucleic Acid Atoms
Solvent Atoms	163
Heterogen Atoms	1

Software

Software
Software Name	Purpose
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
CCP4	data scaling