2QNF

Crystal structure of T4 Endonuclease VII H43N mutant in complex with heteroduplex DNA containing base mismatches

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5	293	25%(w/v) PEG 3350, 100 mM Bis-Tris, 220mM Li2SO4 and 5% (w/v) glucose, pH 6.5, VAPOR DIFFUSION, temperature 293K, pH 6.50

Crystal Properties
Matthews coefficient	Solvent content
3.35	63.23

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.997	α = 90
b = 64.997	β = 90
c = 153.321	γ = 120

Symmetry
Space Group	P 31

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	MARMOSAIC 300 mm CCD		2006-08-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID		APS	22-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	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	3	38	84.6	0.048	20.8	2.89		12214			88.4

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	3	3.11	37.6		0.146	5.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1E7L	3	37.84	12195	12214	1257	84.1	0.246	0.246	0.28	RANDOM	134.2

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]
38.37			38.37		-76.73

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	20.4
c_mcangle_it	3.84
c_scangle_it	2.6
c_mcbond_it	2.32
c_scbond_it	1.66
c_angle_deg	1.2
c_improper_angle_d	1.04
c_bond_d	0.009
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2540
Nucleic Acid Atoms	1300
Solvent Atoms
Heterogen Atoms	2

Software

Software
Software Name	Purpose
CNS	refinement
DENZO	data reduction
HKL-2000	data scaling
PHASER	phasing