3EKZ

Structural Characterization of tetrameric Mycobacterium tuberculosis fructose 1,6-bisphosphate aldolase - substrate binding and catalysis mechanism of a class IIa bacterial aldolase

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.8	298	26% PEG 300, 0.1 NaAcetate pH 4.8, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
4.06	69.74

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.22	α = 90
b = 120.486	β = 90
c = 164.327	γ = 90

Symmetry
Space Group	I 2 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	IMAGE PLATE	RIGAKU RAXIS IV++		2008-05-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.54

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.07	97.1	97.5			36655	36655

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.07	2.14	88.6

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	THROUGHOUT	PDB ENTRY 3EKL	2.07	25.9	36648	36648	1838	97.41	0.15909	0.15794	0.18014	RANDOM	20.638

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]
1.96			-0.8		-1.16

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.375
r_dihedral_angle_3_deg	15.721
r_dihedral_angle_1_deg	11.042
r_dihedral_angle_4_deg	10.69
r_scangle_it	3.352
r_scbond_it	2.099
r_angle_refined_deg	1.666
r_mcangle_it	1.068
r_mcbond_it	0.609
r_nbtor_refined	0.3
r_chiral_restr	0.251
r_nbd_refined	0.21
r_symmetry_vdw_refined	0.169
r_symmetry_hbond_refined	0.154
r_xyhbond_nbd_refined	0.14
r_metal_ion_refined	0.092
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2578
Nucleic Acid Atoms
Solvent Atoms	361
Heterogen Atoms	33

Software

Software
Software Name	Purpose
CrystalClear	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling