2ZAL

Crystal structure of E. coli isoaspartyl aminopeptidase/L-asparaginase in complex with L-aspartate

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	292	100mM Tris/HCl, 80mM calcium chloride, 100mM sodium aspartate, 17% PEG 4000, 13% PEG 400, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 292K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.41

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.89	α = 90
b = 77.28	β = 90
c = 147.53	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	CCD	MARRESEARCH		2002-04-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711	1.095	MAX II	I711

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	1.9	20	95.8	0.064	15	3.5	43572	43572		-3	18.67

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	1.9	1.97	91.3		0.256	2.2	3	4085

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	R-free	PDB entry 1K2X	1.9	20	42200	42200	1372	95.71	0.158	0.158	0.157	0.188	Random	13.27

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]
1.05			-0.36		-0.69

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.92
r_scangle_it	3.91
r_scbond_it	2.29
r_angle_refined_deg	1.34
r_mcangle_it	1.25
r_angle_other_deg	0.83
r_mcbond_it	0.672
r_symmetry_vdw_refined	0.321
r_symmetry_vdw_other	0.311
r_nbd_other	0.243
r_nbd_refined	0.215
r_xyhbond_nbd_refined	0.144
r_symmetry_hbond_refined	0.135
r_metal_ion_refined	0.108
r_nbtor_other	0.085
r_chiral_restr	0.08
r_bond_refined_d	0.014
r_gen_planes_refined	0.005
r_gen_planes_other	0.003
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4259
Nucleic Acid Atoms
Solvent Atoms	248
Heterogen Atoms	69

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345dtb	data collection
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing