8TA0

Crystal Structure of Dihydrofolate reductase (DHFR) from Mycobacterium ulcerans Agy99 in complex with NADP and inhibitor MAM881

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	8F85

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	291	Morpheus H4: 12.5%(v/v) MPD, 12.5%(v/v) PEG 1000, 12.5%(w/v) PEG 3350, 100 mM Imidazole/MES, pH 6.5, 20 mM DL-Glutamic acid, 20 mM DL-Alanine; 20 mM Glycine, 20 mM DL-Lysine monohydrochloride and 20 mM DL-Serine. MyulA.01062.a.B13.PS38720 at 8.9 mg/mL. 2mM MAM881 and 2mM NADP added to the protein prior to crystallization. Plate 13387 well H4 drop 3, Cryo: direct

Crystal Properties
Matthews coefficient	Solvent content
2.19	43.95

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 28.631	α = 90
b = 66.29	β = 91.29
c = 44.03	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	Bruker PHOTON III		2023-06-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE	BRUKER D8 QUEST	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	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	44.02	100	0.122	0.132	0.05	0.995	12.4	6.8		12079

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.95	2		100	0.71	0.828	0.418	0.649		3.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1.95	28.62	1.1	12043	620	99.79	0.1549	0.1519	0.2092

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.166
f_angle_d	1.125
f_chiral_restr	0.056
f_plane_restr	0.012
f_bond_d	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1252
Nucleic Acid Atoms
Solvent Atoms	134
Heterogen Atoms	80

Software

Software
Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
XDS	data reduction
PHASER	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.