3FZI | pdb_00003fzi

1.9 Angstrom structure of the thermophilic exonuclease III homologue Mth0212

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1DE9	PDB ENTRY 1DE9

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	293	reservoir: 20 % PEG 1500, 100mM HEPES pH 7.5; protein solution: 600mM NaCl, 20mM HEPES-KOH pH 7.6, 2mM DTT, vapor diffusion, sitting drop, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.33	47.13

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 56.04	α = 90
b = 56.04	β = 90
c = 161.32	γ = 120

Symmetry
Space Group	P 65

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	MAR CCD 165 mm		2006-03-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X13	0.80150	EMBL/DESY, HAMBURG	X13

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	50	99.8	0.058	36.32	7.5		22592

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	100		0.558		7.3	2218

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-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1DE9	1.9	48.51	22502	1151	99.75	0.20081	0.19755	0.2	0.26161	0.26	RANDOM	28.644

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]
1.45	0.72		1.45		-2.17

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.163
r_dihedral_angle_3_deg	17.492
r_dihedral_angle_4_deg	17.457
r_dihedral_angle_1_deg	7.115
r_scangle_it	3.226
r_scbond_it	2.228
r_mcangle_it	1.649
r_angle_refined_deg	1.563
r_mcbond_it	0.993
r_nbtor_refined	0.321
r_nbd_refined	0.215
r_symmetry_vdw_refined	0.17
r_xyhbond_nbd_refined	0.169
r_symmetry_hbond_refined	0.159
r_chiral_restr	0.11
r_bond_refined_d	0.015
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2152
Nucleic Acid Atoms
Solvent Atoms	292
Heterogen Atoms	1

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345	data collection
HKL-2000	data reduction
HKL-2000	data scaling