2C2X

Three dimensional structure of bifunctional methylenetetrahydrofolate dehydrogenase-cyclohydrolase from Mycobacterium tuberculosis

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1B0A	PDB ENTRY 1B0A

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7		PEG1000, TRIS-HCL, pH 7.00

Crystal Properties
Matthews coefficient	Solvent content
2.35	47.15

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 59.511	α = 90
b = 86.76	β = 90
c = 111.539	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	ADSC CCD		2005-07-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID		APS	19-ID

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	2.01	50	97	0.12	20.7	6.6		39466		-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	2.01	2.08	71		0.43	3.95	6

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 1B0A	2	111.8	37488	1977	99.5	0.208	0.206	0.248	RANDOM	31.52

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]
2.34			-0.75		-1.59

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.633
r_dihedral_angle_4_deg	17.183
r_dihedral_angle_3_deg	16.662
r_dihedral_angle_1_deg	5.678
r_scangle_it	2.38
r_scbond_it	1.508
r_angle_refined_deg	1.323
r_mcangle_it	0.844
r_mcbond_it	0.51
r_nbtor_refined	0.315
r_symmetry_hbond_refined	0.306
r_nbd_refined	0.224
r_symmetry_vdw_refined	0.157
r_xyhbond_nbd_refined	0.154
r_chiral_restr	0.095
r_bond_refined_d	0.008
r_gen_planes_refined	0.004
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_refined
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_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4124
Nucleic Acid Atoms
Solvent Atoms	260
Heterogen Atoms

Software

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