1D0V

CRYSTAL STRUCTURE OF NICOTINATE MONONUCLEOTIDE:5,6-DIMETHYLBENZIMIDAZOLE PHOSPHORIBOSYLTRANSFERASE (COBT) FROM SALMONELLA TYPHIMURIUM COMPLEXED WITH ITS REACTION PRODUCTS DETERMINED TO 1.9 A RESOLUTION


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 6
Temperature 4.0
Details 1.3 NH4H2PO4/(NH4)2HPO4, 1MM 5,6-DIMETHYLBENZIMIDAZOLE, 4 % POLYETHYLENEGLYCOL, AND THEN THE CRYSTALS WERE SOAKED IN 21 MM NICOTINATE MONONUCLEOTIDE IN 1.0 M NAH2PO4/K2HPO4 (PH 6.0), VAPOR DIFFUSION, HANGING DROP

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 72.1 α = 90
b = 90 β = 90
c = 47.6 γ = 90
Symmetry
Space Group P 21 21 2

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 277
2 274
Diffraction Detector
Detector Diffraction Type Details Collection Date
-- -- -- --
AREA DETECTOR SIEMENS HI-STAR -- 1999-01-20
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
-- -- -- -- --
ROTATING ANODE ENRAF-NONIUS -- -- --

Data Collection

Overall
Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (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
1.9 30 87.33 0.066 -- -- 3.1 25069 21894 -- -- --
High Resolution Shell
Resolution (High) Resolution (Low) Percent Possible (All) R Merge I (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All)
1.88 1.98 65.0 -- -- -- 1.3 --

Refinement

Statistics
Structure Solution Method Refinement High Resolution Refinement Low Resolution Cut-off Sigma (I) Cut-off Sigma (F) Number of Reflections (All) Number of Reflections (Observed) Number of Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work R-Free R-Free Selection Details
-- 1.9 30.0 0.0 0.0 25069 21894 -- 87.3 0.163 -- 0.16 0.249 10 % OF DATA WERE OMITTED RANDOMLY
RMS Deviations
Key Refinement Restraint Deviation
t_angle_deg 1.83
t_bond_d 0.01
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2418
Nucleic Acid Atoms 0
Heterogen Atoms 33
Solvent Atoms 158

Software

Computing
Computing Package Purpose
FRAMBO Data Reduction (intensity integration)
XDS Data Reduction (data scaling)
SOLVE Structure Solution
TNT Structure Refinement
Software
Software Name Purpose
TNT refinement
SOLVE model building
XDS data reduction
FRAMBO data collection