3EPG

Structure of Human DNA Polymerase Iota complexed with N2-ethylguanine

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2ALZ	2ALZ minus DNA

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	277.15	12-15% PEG MME 5000, 0.2-0.4M Ammonium Sulfate, 0.1M MES, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 277.15K

Crystal Properties
Matthews coefficient	Solvent content
2.44	49.63

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 98.535	α = 90
b = 98.535	β = 90
c = 202.354	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	IMAGE PLATE	RIGAKU RAXIS IV	Confocal	2006-11-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007	1.5418

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	15	98.9	0.122	13	17.77	30150	19625

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	2.2	2.28	90.6		0.4	5.1	11.73

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	2.5	15	19625	1046	99.07	0.23671	0.23435	0.28284	RANDOM	34.125

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]
0.48	0.24		0.48		-0.72

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.711
r_dihedral_angle_4_deg	20.628
r_dihedral_angle_3_deg	19.237
r_dihedral_angle_1_deg	6.83
r_scangle_it	2.519
r_angle_refined_deg	1.806
r_scbond_it	1.574
r_mcangle_it	0.968
r_mcbond_it	0.516
r_symmetry_vdw_refined	0.431
r_nbtor_refined	0.306
r_symmetry_hbond_refined	0.301
r_nbd_refined	0.247
r_xyhbond_nbd_refined	0.203
r_chiral_restr	0.138
r_bond_refined_d	0.015
r_gen_planes_refined	0.005
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	2896
Nucleic Acid Atoms	310
Solvent Atoms	69
Heterogen Atoms	32

Software

Software
Software Name	Purpose
CrystalClear	data collection
PHASER	phasing
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling