7KX7

Cryo-EM structure of Ephydatia fluviatilis PiwiA-piRNA complex


ELECTRON MICROSCOPY
Sample
Complex between EfPiwi and piRNA
Sample Components
Piwi-A
piRNA
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentHOMEMADE PLUNGER
Cryogen NameETHANE
Sample Vitrification DetailsFreezing was carried out in a cold room at 4 degree C and relative humidity between 95%-98%. 3.5 uL sample was applied to plasma cleaned grid and manu ...Freezing was carried out in a cold room at 4 degree C and relative humidity between 95%-98%. 3.5 uL sample was applied to plasma cleaned grid and manually blotted with Whatman 1 filter paper for 5-7 sec before plunge freezing in liquid ethane at -179 degree C.
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles1862936
Reported Resolution (Å)3.8
Resolution MethodFSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details
Data Acquisition
Detector TypeGATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)47.33
Imaging Experiment1
Date of Experiment
Temperature (Kelvin)
Microscope ModelFEI TALOS ARCTICA
Minimum Defocus (nm)1000
Maximum Defocus (nm)1600
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS2.7
Imaging ModeBRIGHT FIELD
Specimen Holder ModelFEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification36000
Calibrated Magnification43478
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)200
Imaging Details
EM Software
TaskSoftware PackageVersion
PARTICLE SELECTIONRELION2
IMAGE ACQUISITIONLeginon
CTF CORRECTIONCTFFIND4
INITIAL EULER ASSIGNMENTRELION2
FINAL EULER ASSIGNMENTRELION2
RECONSTRUCTIONRELION2.0
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION3280351Laplacian of Gaussian based automated particle picking program in RELION was used.