Experiment: 1ZQO

DNA POLYMERASE BETA (POL B) (E.C.2.7.7.7) COMPLEXED WITH SEVEN BASE PAIRS OF DNA; SOAKED IN THE PRESENCE OF CACL2 (15 MILLIMOLAR) AND NACL (15 MILLIMOLAR)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1ZQG

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 12 HOURS: PEG 3350, 16% IMIDAZOLE, 100 MILLIMOLAR, PH 6.5 CACL2, 15 MILLIMOLAR NACL, 15 MILLIMOLAR SEE REFERENCE 3 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 = 178.691	α = 90
b = 57.741	β = 90
c = 48.171	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		1996-03-08	M	SINGLE WAVELENGTH

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	3.2	20	90	0.072		2.1		7079

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)
	3.2	3.3	92		0.134		1.5

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	1ZQG	3.2	20	7079		90	0.159		0.1548

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	23.5
t_nbd	6.4
t_angle_deg	3.2
t_it	0.027
t_bond_d	0.021
t_trig_c_planes	0.014
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	145
Heterogen Atoms	2

Software

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