8ICO

DNA POLYMERASE BETA (POL B) (E.C.2.7.7.7) COMPLEXED WITH SEVEN BASE PAIRS OF DNA; SOAKED IN THE PRESENCE OF AZT-TP (1 MILLIMOLAR) AND MNCL2 (5 MILLIMOLAR)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	8ICB

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		THIS ENTRY DESCRIBES THE STRUCTURE THAT RESULTED WHEN A COCRYSTAL OF HUMAN DNA POLYMERASE BETA COMPLEXED WITH 7 BASE PAIRS OF DNA (SEE ENTRY 9ICJ AND REFERENCE 1) HAD BEEN SOAKED IN THE FOLLOWING SOLUTION FOR 24 HOURS: PEG 3350, 16% MES, 100 MILLIMOLAR, PH 6.5 NACL, 150 MILLIMOLAR AZT-TP, 1 MILLIMOLAR MNCL2, 5 MILLIMOLAR SEE REFERENCE 2 FOR DETAILS CONCERNING EXPERIMENTAL PROCEDURES, RESULTS, AND DISCUSSION FOR THIS STRUCTURE.

Crystal Properties
Matthews coefficient	Solvent content
3	58.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 179.687	α = 90
b = 57.631	β = 90
c = 48.285	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	AREA DETECTOR	SDMS		1995-04-03	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	2.7	20	91	0.048		1.8		13094

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.7	2.8	74		0.158		1.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	8ICB	2.7	20	13094		91	0.181

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
t_dihedral_angle_d	18.9
t_it	5.6
t_angle_deg	2.9
t_nbd	0.023
t_bond_d	0.018
t_trig_c_planes	0.015
t_gen_planes	0.006
t_incorr_chiral_ct
t_pseud_angle

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2623
Nucleic Acid Atoms	289
Solvent Atoms	141
Heterogen Atoms	34

Software

Software
Software Name	Purpose
TNT	refinement
SDMS	data reduction
SDMS	data scaling
TNT	phasing

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 R01GM157729.