2END

CRYSTAL STRUCTURE OF A PYRIMIDINE DIMER SPECIFIC EXCISION REPAIR ENZYME FROM BACTERIOPHAGE T4: REFINEMENT AT 1.45 ANGSTROMS AND X-RAY ANALYSIS OF THE THREE ACTIVE SITE MUTANTS

X-RAY DIFFRACTION

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Crystallization

Crystal Properties
Matthews coefficient	Solvent content
1.93	36.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 41.31	α = 90
b = 40.11	β = 90.04
c = 37.59	γ = 90

Symmetry
Space Group	P 1 21 1

Refinement

Statistics
Diffraction ID	Structure Solution 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		1.45	6	2	17350			0.161

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	26.9
p_staggered_tor	11.8
p_scangle_it	3.543
p_planar_tor	3.1
p_scbond_it	2.242
p_mcangle_it	1.628
p_mcbond_it	1.074
p_multtor_nbd	0.2
p_xhyhbond_nbd	0.181
p_singtor_nbd	0.173
p_chiral_restr	0.1
p_planar_d	0.055
p_angle_d	0.039
p_bond_d	0.021
p_plane_restr	0.019
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	1129
Nucleic Acid Atoms
Solvent Atoms	172
Heterogen Atoms

Software

Software
Software Name	Purpose
PROLSQ	refinement