3OSN

Structural Basis for Proficient Incorporation of dTTP Opposite O6-Methylguanine by Human DNA Polymerase Iota

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	277	0.2 M Ammonium Sulfate, 12.5% PEG 5000 monomethylether, 0.1 M MES buffer, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.42	49.17

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.973	α = 90
b = 97.973	β = 90
c = 202.757	γ = 120

Symmetry
Space Group	P 65 2 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	MARMOSAIC 300 mm CCD	Mirrors and beryllium lenses	2010-08-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-D	1.00	APS	21-ID-D

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	1.9	47.62	99.8	0.068	37.9	15.7		46192

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)
	1.9	1.97	98.9		0.525	3.2	8.8	4478

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	2ALZ minus DNA	1.9	47.62	43636	2327	99.5	0.2098	0.20814	0.24127	RANDOM	52.544

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]
0.59	0.29		0.59		-0.88

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.184
r_dihedral_angle_4_deg	20.013
r_dihedral_angle_3_deg	17.759
r_dihedral_angle_1_deg	6.337
r_scangle_it	4.136
r_scbond_it	2.795
r_angle_refined_deg	2.284
r_mcangle_it	1.655
r_mcbond_it	0.979
r_chiral_restr	0.164

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.184
r_dihedral_angle_4_deg	20.013
r_dihedral_angle_3_deg	17.759
r_dihedral_angle_1_deg	6.337
r_scangle_it	4.136
r_scbond_it	2.795
r_angle_refined_deg	2.284
r_mcangle_it	1.655
r_mcbond_it	0.979
r_chiral_restr	0.164
r_bond_refined_d	0.026
r_gen_planes_refined	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2999
Nucleic Acid Atoms	309
Solvent Atoms	271
Heterogen Atoms	32

Software

Software
Software Name	Purpose
ADSC	data collection
PHASER	phasing
REFMAC	refinement
HKL-3000	data reduction
HKL-3000	data scaling

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.