3C17

Hexagonal Crystal Structure of Precursor E. coli Isoaspartyl Peptidase/l-Asparaginase (ECAIII) with Active-site T179A mutation

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	292	4.3M NaCl, 0.1M HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 292K

Crystal Properties
Matthews coefficient	Solvent content
5.2	76.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 149.47	α = 90
b = 149.47	β = 90
c = 214.35	γ = 120

Symmetry
Space Group	P 61 2 2

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	MARMOSAIC 225 mm CCD		2007-02-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X12	1.000	EMBL/DESY, HAMBURG	X12

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	47.67	96.6	0.107	14.3	5.9	98405	98405		-3	27.3

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	2.06	98.5		0.76	2.2	5.2	14515

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	R-FREE	PDB entry 1K2X	1.95	44.51	97402	97402	992	95.75	0.184	0.184	0.203	RANDOM	27.62

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]
-1.66	-0.83		-1.66		2.49

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.939
r_dihedral_angle_4_deg	12.949
r_dihedral_angle_3_deg	12.576
r_dihedral_angle_1_deg	5.876
r_scangle_it	3.162
r_scbond_it	1.967
r_angle_refined_deg	1.399
r_mcangle_it	1.11
r_angle_other_deg	0.948
r_mcbond_it	0.631
r_symmetry_hbond_refined	0.324
r_symmetry_vdw_other	0.309
r_nbd_refined	0.227
r_nbd_other	0.195
r_nbtor_refined	0.174
r_mcbond_other	0.174
r_xyhbond_nbd_refined	0.138
r_metal_ion_refined	0.138
r_nbtor_other	0.09
r_chiral_restr	0.083
r_symmetry_vdw_refined	0.06
r_bond_refined_d	0.014
r_gen_planes_refined	0.005
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4442
Nucleic Acid Atoms
Solvent Atoms	434
Heterogen Atoms	28

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345dtb	data collection
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing