3CL9

Structure of bifunctional TcDHFR-TS in complex with MTX

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2H2Q

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	295	17% 2-METHYL-2,4-PENTANEDIOL, 10% PEG 4000, 0.1M POTASSIUM CITRATE, PH 6.0, , VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
4.05	69.66

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 121.05	α = 90
b = 121.05	β = 90
c = 260.76	γ = 90

Symmetry
Space Group	I 41 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	MARRESEARCH			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID	0.9998	APS	17-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	3.3	19.78	97.5	0.01	0.01	9.6	5.1	14555	14555		1	87

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	3.3	3.42	99.5		0.433	3.2	5.3	1601

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2H2Q	3.3	19.78	13809	13809	738	97.47	0.20833	0.20626	0.24901	RANDOM	90.8

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]
0.03			0.03		-0.07

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.899
r_dihedral_angle_3_deg	20.152
r_dihedral_angle_4_deg	15.737
r_dihedral_angle_1_deg	5.899
r_scangle_it	1.466
r_angle_refined_deg	1.322
r_scbond_it	0.811
r_mcangle_it	0.774
r_mcbond_it	0.428
r_nbtor_refined	0.313
r_nbd_refined	0.222
r_symmetry_hbond_refined	0.207
r_symmetry_vdw_refined	0.176
r_xyhbond_nbd_refined	0.148
r_chiral_restr	0.085
r_bond_refined_d	0.01
r_gen_planes_refined	0.003
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_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4015
Nucleic Acid Atoms
Solvent Atoms	20
Heterogen Atoms	122

Software

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