1STH
TWO DISTINCTLY DIFFERENT METAL BINDING MODES ARE SEEN IN X-RAY CRYSTAL STRUCTURES OF STAPHYLOCOCCAL NUCLEASE-COBALT(II)-NUCLEOTIDE COMPLEXES
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | CRYSTAL SOAKED FOR NINE MONTHS AT 277 K IN STABILIZING BUFFER COMPRISING 40% (WW) MPD IN 30 MM TRIS-CL PH 8.15, 50 UM COCL2, 100 UM POTASSIUM CITRATE AND 50 UM PDTP. SOME EVAPORATION OCCURRED DURING THIS PERIOD, SO MPD CONCENTRATION AT TIME OF DATA COLLECTION, WHILE NOT KNOWN PRECISELY, WAS SUBSTANTIALLY GREATER THAN 40%. |
Crystal Properties | |
---|---|
Matthews coefficient | Solvent content |
2.11 | 41.82 |
Crystal Data
Unit Cell | |
---|---|
Length ( Å ) | Angle ( ˚ ) |
a = 47.48 | α = 90 |
b = 47.48 | β = 90 |
c = 63.21 | γ = 90 |
Symmetry | |
---|---|
Space Group | P 41 |
Data Collection
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Diffraction ID | Structure Solution Method | 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 | 1.85 | 6 | 11570 | 99 | 0.174 | 0.174 | 27 |
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 |
x_dihedral_angle_d | 25.1 |
x_angle_deg | 2.99 |
x_improper_angle_d | 1.16 |
x_bond_d | 0.014 |
x_bond_d_na | |
x_bond_d_prot | |
x_angle_d | |
x_angle_d_na | |
x_angle_d_prot | |
x_angle_deg_na |
Non-Hydrogen Atoms Used in Refinement | |
---|---|
Non-Hydrogen Atoms | Number |
Protein Atoms | 1087 |
Nucleic Acid Atoms | |
Solvent Atoms | 58 |
Heterogen Atoms | 26 |
Software
Software | |
---|---|
Software Name | Purpose |
X-PLOR | model building |
X-PLOR | refinement |
X-PLOR | phasing |