ELECTRON CRYSTALLOGRAPHY Experimental Data


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Naturally Occurring in Vivo
pH 7
Temperature 37.0
Details crystals are increased in size by fusion and annealing using detergents, pH 7, naturally occurring in vivo, temperature 37K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 62.45 α = 90
b = 62.45 β = 90
c = 100.9 γ = 120
Symmetry
Space Group P 3

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 93
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD OTHER -- 1998-12-01
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ELECTRON MICROSCOPE OTHER -- -- --

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
3.2 200 77.7 0.173 -- -- -- 7298 5668 -- 0.0 --

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
-- 3.2 200.0 -- -- 7298 5668 610 77.7 -- -- 0.272 0.321 RANDOM
RMS Deviations
Key Refinement Restraint Deviation
c_bond_d 0.009
c_angle_deg 1.4
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1726
Nucleic Acid Atoms 0
Heterogen Atoms 20
Solvent Atoms 0

Software

Software
Software Name Purpose
CNS refinement version: 0.9

EM Sample
Sample Vitrification Details --
Sample Aggregation State 2D ARRAY
Sample Reconstruction Method CRYSTALLOGRAPHY
Name of Sample CYTOPLASMICALLY OPEN CONFORMATION OF BACTERIORHODOPSIN
EM Data Acquisition
Date of Experiment --
Temperature (Kelvin) --
Microscope Model FEI/PHILIPS CM12
Detector Type GENERIC CCD
Minimum Defocus (nm) --
Maximum Defocus (nm) --
Minimum Tilt Angle (degrees) --
Maximum Tilt Angle (degrees) --
Nominal CS --
Imaging Mode DIFFRACTION
Electron Dose (electrons per Å**-2) --
Illumination Mode FLOOD BEAM
Nominal Magnification --
Calibrated Magnification --
Source --
Acceleration Voltage (kV) --
Imaging Details imaging date 1998-12-01
3D Reconstruction
Software Package(s) --
Reconstruction Method(s) --
EM Image Reconstruction Statistics
Number of Particles --
Other Details 402 patterns merged (merging R 17.3%) to generate set of lattice lines covering ~87% of reciprocal space, with resolution of 3.2 A in-plane and 3.6 A vertically [primary citation]
Effective Resolution 3.2