7U8Y

TREX1 Structural Studies Capture Small Molecule Inhibition and Implicate Novel DNA Dynamics


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2OA8 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP298Protein was dialyzed into 20 mM MES (pH 6.5) with 50 mM NaCl. Complex was formed by incubating the protein at 5 mg/mL with 2 mM dAMP and 5 mM MnCl2. 0.3 uL protein complex at 5 mg/ml TREX1 was mixed with an equal volume of reservoir solution and placed on a bridge above 50 uL of the reservoir solution. mTREX1-dAMP crystals grew in initial conditions of 0.2 M MES monohydrate, sodium hydroxide (pH 6.2), and 20% w/v polyethylene glycol 4,000. All crystals grew within one week. After crystal formation, 4 mM TIM009 was soaked into mTREX1-dAMP crystals for 5 days. Prior to data collection crystals were dipped into reservoir solution containing 15% glycerol in preparation for cryo-cooling
Crystal Properties
Matthews coefficientSolvent content
2.3848.3

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 127.555α = 90
b = 127.555β = 90
c = 80.01γ = 120
Symmetry
Space GroupH 3

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELDECTRIS PILATUS 200Kvarimax HR2020-02-17MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU MICROMAX-0071.54

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)Rpim I (All)CC (Half)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.225099.10.0730.0770.0250.99730.89.42326237.4
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)Rpim I (All)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.222.2989.50.3280.3550.1330.9535.8

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT2OA82.2245.522068119497.290.183090.180970.22175RANDOM49.402
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]
-0.08-0.04-0.080.26
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg29.667
r_dihedral_angle_4_deg16.118
r_dihedral_angle_3_deg14.493
r_long_range_B_other9.529
r_long_range_B_refined9.521
r_dihedral_angle_1_deg6.297
r_scangle_other4.56
r_scbond_it3.066
r_scbond_other3.065
r_mcangle_it2.954
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg29.667
r_dihedral_angle_4_deg16.118
r_dihedral_angle_3_deg14.493
r_long_range_B_other9.529
r_long_range_B_refined9.521
r_dihedral_angle_1_deg6.297
r_scangle_other4.56
r_scbond_it3.066
r_scbond_other3.065
r_mcangle_it2.954
r_mcangle_other2.926
r_mcbond_it2.077
r_mcbond_other2.044
r_angle_refined_deg1.343
r_angle_other_deg1.074
r_chiral_restr0.085
r_bond_refined_d0.009
r_gen_planes_refined0.005
r_bond_other_d0.001
r_gen_planes_other0.001
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3448
Nucleic Acid Atoms
Solvent Atoms124
Heterogen Atoms92

Software

Software
Software NamePurpose
REFMACrefinement
PHASERphasing
Cootmodel building
CrysalisProdata collection
HKL-3000data reduction
HKL-3000data scaling