1AT9

STRUCTURE OF BACTERIORHODOPSIN AT 3.0 ANGSTROM DETERMINED BY ELECTRON CRYSTALLOGRAPHY


ELECTRON CRYSTALLOGRAPHY

Crystallization

Crystal Properties
Matthews coefficientSolvent content
4.2371

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 62.45α = 90
b = 62.45β = 90
c = 100γ = 120
Symmetry
Space GroupP 3

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11electron1992-04-01

Refinement

Statistics
Diffraction IDStructure Solution MethodResolution (High)Resolution (Low)Number Reflections (R-Free)Percent Reflections (Observed)R-WorkR-FreeMean Isotropic B
ELECTRON CRYSTALLOGRAPHY2.8
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1778
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms20

Software

Software
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing
Sample
Bacteriorhodopsin
Specimen Preparation
Sample Aggregation State2D ARRAY
Vitrification InstrumentREICHERT-JUNG PLUNGER
Cryogen NameETHANE
Sample Vitrification Detailsdelay of 10 seconds before rapid freezing
Embedding Materialtrehalose
Embedding Details3% trehalose
3D Reconstruction
Reconstruction MethodCRYSTALLOGRAPHY
Number of Particles
Reported Resolution (Å)2.8
Resolution MethodDIFFRACTION PATTERN/LAYERLINES
Other Details
Refinement Type
Symmetry Type2D CRYSTAL
Data Acquisition
Detector TypeGENERIC GATAN (2k x 2k)KODAK SO-163 FILM
Electron Dose (electrons/Å**2)1010
Imaging Experiment12
Date of Experiment
Temperature (Kelvin)
Microscope ModelJEOL 4000JEOL 3000SFF
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeDIFFRACTIONBRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
SourceFIELD EMISSION GUNFIELD EMISSION GUN
Acceleration Voltage (kV)400300
Imaging Details
EM Software
TaskSoftware PackageVersion
CRYSTALLOGRAPHY MERGINGCCP4 programs