2P2N

Crystal Structure and Allosteric Regulation of the Cytoplasmic Escherichia coli L-Asparaginase I

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	4	291	citric acid, sodium chloride, pH 4.0, VAPOR DIFFUSION, temperature 291.0K

Crystal Properties
Matthews coefficient	Solvent content
2.11	41.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 90.315	α = 90
b = 89.757	β = 117.03
c = 93.083	γ = 90

Symmetry
Space Group	P 1 21 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		2005-03-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1.01259	APS	22-ID

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	1.9	50	90.6	0.084	17.9	3.6	95017	95017		-3

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)
	1.9	1.97			0.246	5	3.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	1.9	50	89743	4744	90.67	0.22271	0.264	RANDOM

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]
0.47		-0.26	-1.2		0.5

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.862
r_sphericity_bonded	24.71
r_sphericity_free	14.37
r_dihedral_angle_1_deg	5.92
r_scangle_it	2.949
r_scbond_it	2.029
r_mcangle_it	1.396
r_angle_refined_deg	1.369
r_mcbond_it	0.848
r_nbtor_refined	0.302

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.862
r_sphericity_bonded	24.71
r_sphericity_free	14.37
r_dihedral_angle_1_deg	5.92
r_scangle_it	2.949
r_scbond_it	2.029
r_mcangle_it	1.396
r_angle_refined_deg	1.369
r_mcbond_it	0.848
r_nbtor_refined	0.302
r_symmetry_vdw_refined	0.245
r_nbd_refined	0.206
r_xyhbond_nbd_refined	0.138
r_symmetry_hbond_refined	0.129
r_chiral_restr	0.09
r_bond_refined_d	0.013
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9696
Nucleic Acid Atoms
Solvent Atoms	575
Heterogen Atoms	52

Software

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.