4XVN

Crystal structure of the small terminase from thermophilic phage G20C

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	0.1 M Hepes pH 7.5, 0.4 M ammonium acetate, 18 % (w/v) PEG 3.35 K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 152.585	α = 90
b = 152.585	β = 90
c = 108.805	γ = 120

Symmetry
Space Group	H 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	PSI PILATUS 6M		2012-12-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I02	0.9795	Diamond	I02

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	2.6	45.39	99.9	0.082	13.8	4.6		29032		-3	62.4

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.6	2.72	100		0.998	1.7	4.8

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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	FREE R-VALUE	2.6	45.39	29031	954	99.88	0.2499	0.249	0.2762	RANDOM	85.772

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]
0.71	0.36		0.71		-2.31

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.636
r_dihedral_angle_3_deg	11.656
r_dihedral_angle_4_deg	11.585
r_dihedral_angle_1_deg	4.168
r_mcangle_it	2.57
r_mcbond_it	1.43
r_mcbond_other	1.43
r_angle_refined_deg	0.857
r_angle_other_deg	0.764
r_chiral_restr	0.041
r_bond_refined_d	0.006
r_gen_planes_refined	0.003
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6209
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
SHELX	phasing
Aimless	data scaling