8G50

E. coli DHFR complex with NADP+ and folate: EF-X excited state model by Laue diffraction (electric field along b axis; 8-fold extrapolation of structure factor differences)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	7LVC

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		277	20 mM imadazole (pH 5.4-5.8), 15-20% PEG 400, 125 mM MnCl2

Crystal Properties
Matthews coefficient	Solvent content
2.14	42.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 34.286	α = 90
b = 45.53	β = 90
c = 98.995	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	278	CCD	RAYONIX MX340-HS		2021-04-02	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 14-ID-B	1.02 - 1.18	APS	14-ID-B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	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	1.7	41.36	99.4	0.987	14.27	18.63		33671			-5.08

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.7	1.76	99.5		0.927	7	14.16

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	FREE R-VALUE	1.7	41.36	33647	1694	99.36	0.3086	0.3064	0.3501	5.54

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	12.9153
f_angle_d	0.7811
f_chiral_restr	0.0578
f_bond_d	0.0086
f_plane_restr	0.0061

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2540
Nucleic Acid Atoms
Solvent Atoms	249
Heterogen Atoms	170

Software

Software
Software Name	Purpose
PHENIX	refinement
Precognition	data reduction
careless	data scaling
PHENIX	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.