3D0P

Insights into RNA/DNA hybrid recognition and processing by RNase H from the crystal structure of a non-specific enzyme-dsDNA complex

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.6	291	0.1 M sodium acetate, 8 % (w/v) PEG 4000, pH 4.6, VAPOR DIFFUSION, SITTING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.79	55.94

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 98.397	α = 90
b = 66.66	β = 122.31
c = 76.926	γ = 90

Symmetry
Space Group	C 1 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	MARMOSAIC 225 mm CCD		2007-10-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.97850	APS	21-ID-F

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	1.8	50	97.3	0.061	12.4	7.7	38816	37768

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)
	1.8	1.86	94.7		0.248	12.4	7.3	3643

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1ZBI, using one protein molecule.	1.8	41.59	35877	1886	99.99	0.21539	0.21396	0.24108	RANDOM	31.474

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]
-1.44		-1.42	-1.4		1.32

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.558
r_dihedral_angle_4_deg	17.274
r_dihedral_angle_3_deg	16.627
r_dihedral_angle_1_deg	5.925
r_scangle_it	3.633
r_scbond_it	2.448
r_mcangle_it	1.862
r_angle_refined_deg	1.672
r_mcbond_it	1.042
r_chiral_restr	0.12

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.558
r_dihedral_angle_4_deg	17.274
r_dihedral_angle_3_deg	16.627
r_dihedral_angle_1_deg	5.925
r_scangle_it	3.633
r_scbond_it	2.448
r_mcangle_it	1.862
r_angle_refined_deg	1.672
r_mcbond_it	1.042
r_chiral_restr	0.12
r_bond_refined_d	0.016
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2169
Nucleic Acid Atoms	486
Solvent Atoms	166
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345dtb	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing
CNS	refinement

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.