6I9D

MloK1 consensus structure from single particle analysis of 2D crystals


ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 6EO1 
experimental modelPDB 3BEH 
experimental modelPDB 3CL1 
Sample
MloK1 potassium channel in lipidic bilayer of 2D crystals
Specimen Preparation
Sample Aggregation State2D ARRAY
Vitrification Instrument
Cryogen NameETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles231688
Reported Resolution (Å)4
Resolution MethodFSC 0.143 CUT-OFF
Other DetailsAngular assignments and x,y shifts were refined using a custom auto-refinement script written for FREALIGN v9.11. Maximum resolution used for refineme ...Angular assignments and x,y shifts were refined using a custom auto-refinement script written for FREALIGN v9.11. Maximum resolution used for refinement was 7.52 A.
Refinement Type
Symmetry TypePOINT
Point SymmetryC4
Map-Model Fitting and Refinement
Id1 (6EO1, 3BEH, 3CL1, 6EO1)
Refinement Space
Refinement ProtocolFLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeGATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)45
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)750
Maximum Defocus (nm)4300
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification50000
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
CTF CORRECTIONCTFFIND
CTF CORRECTIONCTFTILT
MODEL FITTINGiMODFIT1.44
INITIAL EULER ASSIGNMENTFOCUS
FINAL EULER ASSIGNMENTFREALIGN9.11
RECONSTRUCTIONFREALIGN9.11
MODEL REFINEMENTPHENIX1.13
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTIONThe defocus at the center of each particle box was estimated based on the tilt geometry.231688The particle positions were given by the cross-correlation profile generated by the classical unbending algorithm.