1IAD

REFINED 1.8 ANGSTROMS X-RAY CRYSTAL STRUCTURE OF ASTACIN, A ZINC-ENDOPEPTIDASE FROM THE CRAYFISH ASTACUS ASTACUS L. STRUCTURE DETERMINATION, REFINEMENT, MOLECULAR STRUCTURE AND COMPARISON TO THERMOLYSIN


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 62 α = 90
b = 62 β = 90
c = 98.87 γ = 120
Symmetry
Space Group P 31 2 1

Diffraction

Diffraction Radiation
Monochromator Protocol
-- --
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline

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
-- 2.3 10.0 -- -- -- -- -- -- -- 0.155 0.155 -- --
RMS Deviations
Key Refinement Restraint Deviation
x_bond_d 0.018
x_angle_deg 2.739
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1591
Nucleic Acid Atoms 0
Heterogen Atoms 0
Solvent Atoms 172

Software

Computing
Computing Package Purpose
X-PLOR Structure Solution
X-PLOR Structure Refinement
Software
Software Name Purpose
X-PLOR refinement
X-PLOR model building