7T7R

Structure of Munc13-1 C1-C2B-MUN-C2C trimer between lipid bilayers


ELECTRON MICROSCOPY
Sample
2D crystal of Munc13-1 C1-C2B-MUN-C2C domains between two lipid bilayers.
Specimen Preparation
Sample Aggregation State2D ARRAY
Vitrification InstrumentFEI VITROBOT MARK IV
Cryogen NameETHANE
Sample Vitrification Detailsblot for 5 sec before plunging, blot force -1
3D Reconstruction
Reconstruction MethodSUBTOMOGRAM AVERAGING
Number of Particles42237
Reported Resolution (Å)10
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC3
Map-Model Fitting and Refinement
Id1
Refinement Space
Refinement ProtocolFLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
DetailsModel for fitting was generated by AlphaFold using the construct's amino acid sequence. Flexible fitting into corresponding density was performed usin ...Model for fitting was generated by AlphaFold using the construct's amino acid sequence. Flexible fitting into corresponding density was performed using ISOLDE tool in ChimeraX. The resulting structure was copied and fitted as rigid bodies into the 3D map by "fit in map" function in Chimera.
Data Acquisition
Detector TypeGATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)3.1
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TITAN KRIOS
Minimum Defocus (nm)3500
Maximum Defocus (nm)5000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
IMAGE ACQUISITIONSerialEM
MODEL FITTINGISOLDE1.2.0
MODEL FITTINGUCSF ChimeraX1.2
MODEL FITTINGUCSF Chimera1.16
FINAL EULER ASSIGNMENTRELION3.1
RECONSTRUCTIONRELION3.1
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTIONCTF correction was performed during 3D reconstruction in RELION 3.1