2FMG

Carbonic anhydrase activators. Activation of isoforms I, II, IV, VA, VII and XIV with L- and D- phenylalanine and crystallographic analysis of their adducts with isozyme II: sterospecific recognition within the active site of an enzyme and its consequences for the drug design, structure with L-phenylalanine


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 7.7
Temperature 277.0
Details 2.4-2.5 M (NH4)2SO4 in 50mM Tris.HCl pH 7.7-7.8, 1 mM sodium 4-(hydroxymercury)benzoate, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 41.99 α = 90
b = 41.41 β = 104.4
c = 72.2 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD OXFORD SAPPHIRE CCD -- 2005-10-27
Diffraction Radiation
Monochromator Protocol
graphite SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SEALED TUBE OXFORD DIFFRACTION ENHANCED ULTRA 1.5418 -- --

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
1.6 15 34.0 0.095 -- -- -- -- 29735 0.0 2.0 --
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)
1.6 1.68 40.0 -- -- -- -- --

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
MOLECULAR REPLACEMENT 1.6 15.0 -- 2.0 31349 29145 2910 -- -- -- 0.22 0.24 random
RMS Deviations
Key Refinement Restraint Deviation
c_angle_deg 1.36
c_bond_d 0.005
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2049
Nucleic Acid Atoms 0
Heterogen Atoms 14
Solvent Atoms 160

Software

Software
Software Name Purpose
MOSFLM data reduction
SCALEPACK data scaling
CNS refinement
CNS phasing