3NGD | pdb_00003ngd

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

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	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	49.15

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.999	α = 90
b = 97.999	β = 90
c = 202.552	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	Bruker Platinum 135	Bruker Montel Confocal Multilayer Mirrors	2009-09-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	BRUKER AXS MICROSTAR	1.54

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	2.8	80	96.8	0.174	11.2	17.9		14304

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)
	2.8	2.85	86.7		0.872	1.1	3.8	627

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 (Depositor)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2ALZ minus DNA	2.8	80	13705	704	96.89	0.21836	0.21504	0.28377	0.2288	RANDOM	46.048

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]
1.03	0.51		1.03		-1.54

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	44.534
r_dihedral_angle_4_deg	21.919
r_dihedral_angle_3_deg	20.725
r_dihedral_angle_1_deg	6.744
r_scangle_it	2.689
r_angle_refined_deg	1.695
r_scbond_it	1.607
r_mcangle_it	0.928
r_mcbond_it	0.464
r_chiral_restr	0.104
r_bond_refined_d	0.014
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2898
Nucleic Acid Atoms	309
Solvent Atoms	64
Heterogen Atoms	28

Software

Software
Software Name	Purpose
PROTEUM PLUS	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling