X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Details CRYSTALLIZED IN 50 MM TRIS-HC1 2.4 M AMMONIUM SULFATE PH 8. 5 AND 1 MM HGC12 AT 4 DEG C (TILANDER, B., STRANDBERG, B. & FRIDBORG, K. (1965). CRYSTAL STRUCTURE ON HUMAN ERYTHROCYTIC CARBONIC ANHYDRASE C. J. MOL. BIOL. 12, 740-760). THE MERCURY IS SUBSEQUENTLY REMOVED BY MERCAPTOETHANOL AND THE ZINC ION WITH DIPICOLINATE. AFTER INSERTION OF COBALT (II), THE CRYSTALS ARE SOAKED IN 0.25 M BICARBONATE 3M AMMONIUM SULFATE 50 MM TRIS-HC1 PH 8.1 OVERNIGHT. THE PROCEDURE IS DESCRIBED IN DETAIL IN THE PAPER MENTIONED ABOVE.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 42.7 α = 90
b = 41.7 β = 104.6
c = 73 γ = 90
Symmetry
Space Group P 1 21 1

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
-- 1.88 10.0 -- 0.0 -- 17858 -- -- -- 0.16 -- -- --
RMS Deviations
Key Refinement Restraint Deviation
p_orthonormal_tor 30.7
p_staggered_tor 16.4
p_planar_tor 3.4
p_xhyhbond_nbd 0.155
p_multtor_nbd 0.159
p_bond_d 0.02
p_angle_d 0.037
p_planar_d 0.047
p_mcbond_it 0.96
p_mcangle_it 1.553
p_scbond_it 1.964
p_scangle_it 3.053
p_plane_restr 0.018
p_chiral_restr 0.229
p_singtor_nbd 0.161
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 2059
Nucleic Acid Atoms 0
Heterogen Atoms 5
Solvent Atoms 217

Software

Computing
Computing Package Purpose
PROFFT Structure Refinement
Software
Software Name Purpose
PROFFT refinement