2Q6T

Crystal structure of the Thermus aquaticus DnaB monomer

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	298	1.3M Ammonium Sulfate, 10mM Magnesium Sulfate, 5% 1,6-hexanediol, 100mM MES, pH 6.5, VAPOR DIFFUSION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.94	58.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 104.707	α = 90
b = 104.707	β = 90
c = 363.258	γ = 120

Symmetry
Space Group	P 31 2 1

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	ADSC QUANTUM 315		2001-04-05	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	ADSC QUANTUM 315			M	MAD
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.1404	NSLS	X25
2	SYNCHROTRON	APS BEAMLINE 19-ID	0.97935, 0.97949, 0.96411	APS	19-ID

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	2.9	30	99.17	0.098	15.8	5.4	51424	47366	1	1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1,2	2.9	2.974	99.92		1.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	2.9	20	51424	49121	2638	99.17	0.243	0.24085	0.28453	RANDOM	104.751

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]
4.93	2.47		4.93		-7.4

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.307
r_dihedral_angle_3_deg	14.655
r_dihedral_angle_4_deg	12.379
r_scangle_it	3.361
r_dihedral_angle_1_deg	3.081
r_scbond_it	1.932
r_mcangle_it	1.224
r_angle_refined_deg	1.139
r_mcbond_it	0.742
r_nbtor_refined	0.302
r_nbd_refined	0.205
r_symmetry_vdw_refined	0.178
r_symmetry_hbond_refined	0.142
r_xyhbond_nbd_refined	0.135
r_chiral_restr	0.082
r_bond_refined_d	0.007
r_gen_planes_refined	0.003
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	12701
Nucleic Acid Atoms
Solvent Atoms	25
Heterogen Atoms	20

Software

Software
Software Name	Purpose
REFMAC	refinement
CBASS	data collection
HKL-2000	data reduction
HKL-2000	data scaling
SOLVE	phasing