1RRE

Crystal structure of E.coli Lon proteolytic domain

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	298	ammonium sulfate, MES, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.07	40.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.37	α = 90
b = 86.37	β = 90
c = 124.16	γ = 120

Symmetry
Space Group	P 31

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	ADSC QUANTUM 4		2003-08-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X9B	0.97915	NSLS	X9B

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	1.75	20	100	0.075	19.2			105429	1	1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.75	1.81	100		2.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	SAD	THROUGHOUT	1.75	19.96	1	88329	9386	93.55	0.21025	0.20475	0.26269	RANDOM	23.21

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]
-0.04	-0.02		-0.04		0.07

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.994
r_scangle_it	4.673
r_scbond_it	2.807
r_mcangle_it	1.787
r_angle_refined_deg	1.75
r_angle_other_deg	1.404
r_mcbond_it	1.009
r_symmetry_vdw_other	0.279
r_nbd_other	0.247
r_nbd_refined	0.235
r_symmetry_vdw_refined	0.201
r_xyhbond_nbd_refined	0.199
r_symmetry_hbond_refined	0.168
r_chiral_restr	0.11
r_nbtor_other	0.088
r_bond_refined_d	0.02
r_gen_planes_refined	0.007
r_gen_planes_other	0.005
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8203
Nucleic Acid Atoms
Solvent Atoms	792
Heterogen Atoms	25

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SOLVE	phasing