7S7C

Human Nuclear Exosome Targeting (NEXT) complex bound to RNA (substrate 2)

ELECTRON MICROSCOPY

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Sample
human Nuclear Exosome Targeting (NEXT) complex bound to RNA (substrate 2)

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	30 s wait time, blot for 2.5 s before plunging

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	252638
Reported Resolution (Å)	3.62
Resolution Method	FSC 0.143 CUT-OFF
Other Details	A total of 252,638 gave rise to an overall map at 3.62 Angstrom resolution (FSC 0.143 cut off). A composite reconstruction (deposited main map) was generated by combining the overall map with focused refinement maps of MTR4 core (3.5 Angstrom FSC=0.143), MTR4 core-ZCCHC8 PSP-RBM7-RNA (3.42 Angstrom, FSC=0.143), RBM7-RNA (3.94 Angstrom, FSC=0.143), MTR4-ZCCHC8 HD/KID (3.62 Angstrom, FSC=0.143), and MTR4 KOW-ZCCHC8 HD/KID (3.34 Angstrom, FSC=0.143) regions.
Refinement Type
Symmetry Type	POINT

Map-Model Fitting and Refinement
Id	1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K2 SUMMIT (4k x 4k)	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	77.5	66

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
IMAGE ACQUISITION	Leginon
IMAGE ACQUISITION	SerialEM
CTF CORRECTION	Gctf
RECONSTRUCTION	RELION

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION