3GNK

Calcium bound to the Holliday junction sequence d(TCGGCGCCGA)4


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP7290CaCl2, MPD, NaCacodylate , pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 290K, temperature 290.0K
Crystal Properties
Matthews coefficientSolvent content
2.2745.73

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 65.97α = 90
b = 24.17β = 110.37
c = 73.89γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDOXFORD SAPPHIRE CCDmultilayer opticsMSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SEALED TUBEOXFORD DIFFRACTION ENHANCE ULTRA1.5418

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)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
12.116.34799.410.06211.443.9664366221117.122
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
2.12.15599.410.1942.3531773

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB entry 1L4J2.116.3476622662231199.410.2180.2180.2140.306RANDOM17.122
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]
-1.240.061.3-0.02
RMS Deviations
KeyRefinement Restraint Deviation
r_angle_refined_deg1.285
r_scangle_it1.079
r_scbond_it0.716
r_nbtor_refined0.293
POTENTIAL METAL-ION REFINED ATOMS (A)0.163
r_nbd_refined0.162
r_xyhbond_nbd_refined0.119
r_symmetry_vdw_refined0.098
r_symmetry_hbond_refined0.071
r_chiral_restr0.053
RMS Deviations
KeyRefinement Restraint Deviation
r_angle_refined_deg1.285
r_scangle_it1.079
r_scbond_it0.716
r_nbtor_refined0.293
POTENTIAL METAL-ION REFINED ATOMS (A)0.163
r_nbd_refined0.162
r_xyhbond_nbd_refined0.119
r_symmetry_vdw_refined0.098
r_symmetry_hbond_refined0.071
r_chiral_restr0.053
r_bond_refined_d0.005
r_gen_planes_refined0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms
Nucleic Acid Atoms808
Solvent Atoms183
Heterogen Atoms4

Software

Software
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
CrysalisProdata collection
CrysalisProdata reduction
MOLREPphasing
REFMACrefinement