5DFR

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

X-RAY DIFFRACTION

---

Crystallization

Crystal Properties
Matthews coefficient	Solvent content
3.15	60.98

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.73	α = 90
b = 68.73	β = 90
c = 83.35	γ = 120

Symmetry
Space Group	P 31 2 1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION		2.3	20			0.198

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_staggered_tor	26.5
p_orthonormal_tor	22.3
p_planar_tor	11.3
p_scangle_it	6.914
p_mcangle_it	5.832
p_scbond_it	5.088
p_mcbond_it	4.412
p_chiral_restr	0.347
p_multtor_nbd	0.235
p_singtor_nbd	0.229
p_xhyhbond_nbd	0.213
p_planar_d	0.077
p_angle_d	0.066
p_bond_d	0.026
p_plane_restr	0.024
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	1220
Nucleic Acid Atoms
Solvent Atoms	120
Heterogen Atoms	3

Software

Software
Software Name	Purpose
PROLSQ	refinement