3I4U

Crystal Structure Analysis of a helicase associated domain

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	293	2uL drop (1:1); 1.7M (NH4)2SO4, 0.1M Tris/HCl, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.21	44.38

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.854	α = 90
b = 78.854	β = 90
c = 88.793	γ = 90

Symmetry
Space Group	P 41 21 2

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	MAR CCD 165 mm		2006-12-08	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	MAR CCD 165 mm		2007-08-12		MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE BW7A	0.91164	EMBL/DESY, HAMBURG	BW7A
2	SYNCHROTRON	BESSY BEAMLINE 14.2	0.97976, 0.9799, 0.95, 1.0	BESSY	14.2

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
1,2	2.1	50	99.7	0.069	29.2			31239			36.8

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	MAD	THROUGHOUT	2.1	29.48	15845	843	98.55	0.19532	0.19278	0.24486	RANDOM	40.097

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]
0.34			0.34		-0.68

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.743
r_dihedral_angle_3_deg	13.354
r_dihedral_angle_4_deg	10.598
r_dihedral_angle_1_deg	4.698
r_scangle_it	3.865
r_mcangle_it	2.731
r_scbond_it	2.166
r_mcbond_it	1.607
r_angle_refined_deg	0.881
r_nbtor_refined	0.293
r_nbd_refined	0.178
r_symmetry_vdw_refined	0.148
r_symmetry_hbond_refined	0.111
r_xyhbond_nbd_refined	0.101
r_chiral_restr	0.061
r_bond_refined_d	0.006
r_gen_planes_refined	0.002
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	1952
Nucleic Acid Atoms
Solvent Atoms	190
Heterogen Atoms	45

Software

Software
Software Name	Purpose
HKL-2000	data collection
SHARP	phasing
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling