1NNS

L-asparaginase of E. coli in C2 space group and 1.95 A resolution

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3ECA	PDB ENTRY 3ECA

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	291	PEG 3350, MES, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.14	42.05

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 76.296	α = 90
b = 134.617	β = 110.51
c = 64.867	γ = 90

Symmetry
Space Group	C 1 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	298	IMAGE PLATE	MARRESEARCH	cyllindrical mirror and triangular bent single crystal monochromator.		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	LNLS BEAMLINE D03B-MX1	1.38	LNLS	D03B-MX1

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	1.95	13	91.8	0.047		1.55		40782

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.95	2			0.325	2.4

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3ECA	1.95	12.97	38737	2045	91.83	0.13176	0.12969	0.17125	RANDOM	18.58

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		-0.01	-0.04		0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.327
r_dihedral_angle_3_deg	17.165
r_dihedral_angle_4_deg	13.248
r_dihedral_angle_1_deg	5.796
r_scangle_it	5.536
r_scbond_it	3.328
r_angle_refined_deg	2.097
r_mcangle_it	1.87
r_mcbond_it	1.059
r_symmetry_hbond_refined	0.368
r_symmetry_vdw_refined	0.291
r_nbd_refined	0.228
r_chiral_restr	0.203
r_xyhbond_nbd_refined	0.16
r_bond_refined_d	0.027
r_gen_planes_refined	0.01
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4862
Nucleic Acid Atoms
Solvent Atoms	329
Heterogen Atoms	18

Software

Software
Software Name	Purpose
MAR345	data collection
SCALEPACK	data scaling
AMoRE	phasing
REFMAC	refinement