1DRB

CRYSTAL STRUCTURE OF UNLIGANDED ESCHERICHIA COLI DIHYDROFOLATE REDUCTASE. LIGAND-INDUCED CONFORMATIONAL CHANGES AND COOPERATIVITY IN BINDING

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
2.56	52.01

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 92.84	α = 90
b = 92.84	β = 90
c = 74.24	γ = 120

Symmetry
Space Group	P 61

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray

Refinement

Statistics
Diffraction ID	Structure Solution 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		1.96	5	25191			0.149

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
p_orthonormal_tor	19.8
p_staggered_tor	17.6
p_scangle_it	6.432
p_planar_tor	4.5
p_mcangle_it	4.374
p_scbond_it	4.177
p_mcbond_it	3.163
p_multtor_nbd	0.277
p_chiral_restr	0.276
p_xhyhbond_nbd	0.26
p_singtor_nbd	0.175
p_planar_d	0.036
p_angle_d	0.025
p_bond_d	0.017
p_plane_restr	0.016
p_angle_deg
p_hb_or_metal_coord
p_xyhbond_nbd
p_transverse_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2504
Nucleic Acid Atoms
Solvent Atoms	432
Heterogen Atoms	69

Software

Software
Software Name	Purpose
PROLSQ	refinement