38RK | pdb_000038rk

Cryo-EM structure of the L274A mutant of the Arabidopsis thaliana mechanosensitive channel of small conductance-like protein 2 (MSL2) in DOPC lipid nanodiscs.

ELECTRON MICROSCOPY

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Refinement

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	3.809
f_angle_d	0.427
f_chiral_restr	0.045
f_bond_d	0.003
f_plane_restr	0.003

Sample
Mechanosensitive channel protein 2 (MSL2) from Arabidopsis thaliana

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	20s wait time, 1s blotting time and -2 blotting force

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	81059
Reported Resolution (Å)	2.8
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C7

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

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	54

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	TFS KRIOS
Minimum Defocus (nm)	1000
Maximum Defocus (nm)	2500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification	81000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
PARTICLE SELECTION	cryoSPARC	v3
MODEL REFINEMENT	PHENIX	1.20.1_4487
IMAGE ACQUISITION	SerialEM
CTF CORRECTION	cryoSPARC	v3
INITIAL EULER ASSIGNMENT	cryoSPARC	v3
FINAL EULER ASSIGNMENT	cryoSPARC
CLASSIFICATION	cryoSPARC	v3
RECONSTRUCTION	cryoSPARC

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