1OLO

Hexameric Replicative DNA Helicase RepA from Plasmid RSF1010 - Cubic Crystal Structure

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1G8Y	PDB ENTRY 1G8Y

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	291	SITTING DROP VAPOR DIFFUSION AT 291K. PROTEIN STOCK: 26MG/ML REPA, 10MM TRIS-HCL PH8.0, 150MM NACL, 0.1MM EDTA. PRECIPITANT: 100MM TRIS-HCL PH 7.5, 26% PEG400, 100MM MGSO4

Crystal Properties
Matthews coefficient	Solvent content
4.8	74.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 190.293	α = 90
b = 190.293	β = 90
c = 190.293	γ = 90

Symmetry
Space Group	P 43 3 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	IMAGE PLATE	MARRESEARCH	MIRRORS	2000-12-15	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR571

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	2.52	150	99.1	0.106	13.6	7.64		40046

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	2.52	2.58	89.7		0.6	3.3	4.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	PDB ENTRY 1G8Y	2.55	25	37753	991	99.8	0.176	0.19	0.211	0.22	RANDOM	34.09

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
r_scangle_it	4.223
r_scbond_it	2.633
r_mcangle_it	1.564
r_mcbond_it	0.829
r_bond_refined_d
r_bond_other_d
r_angle_refined_deg
r_angle_other_deg
r_dihedral_angle_1_deg
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_chiral_restr
r_gen_planes_refined
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3810
Nucleic Acid Atoms
Solvent Atoms	421
Heterogen Atoms	10

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling