ISDA: 8AVB

ELECTRON MICROSCOPY

Sample

Complex between mouse leptin and the mouse LEP-R ectodomain.

Specimen Preperation

Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	?

3D Reconstruction

Reconstruction Method	SINGLE PARTICLE
Number of Particles	28296
Reported Resolution (Å)	4.43
Resolution Method	FSC 0.143 CUT-OFF
Other Details	?
Refinement Type
Symmetry Type	POINT

Map-Model Fitting and Refinement

ID	1
Refinement Space	REAL
Refinement Protocol	FLEXIBLE FIT
Refinement Target	?
Overall B Value	?
Fitting Procedure	?
Details	An atomic model for a 1:2 mLeptin:LEP-RIgCRH2FnIII complex was created based on the AlphaFold prediction for mLEP-RECD and the determined mLeptin:mLEP-RIgCRH2 and mLEP-RFnIII module crystal structures and fitted in the cryo-EM map via Chimera followed by real space refinement in Phenix using rigid body refinement and coordinate refinement with reference restraints to the starting model and hydrogen-bonding restraints across the site II and site III mLeptin:mLEP-R interface regions.

Data Acquisition

Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å²)	62

Imaging Experiment

Date of Experiment	?
Temprature (Kelvin)
Microscope Model	JEOL CRYO ARM 300
Minimum Defocus (nm)	800
Maximum Defocus (nm)	3000
Minimum Tilt Angle (degrees)	?
Maximum Tilt Angle (degrees)	?
Nominal CS	?
Imaging Mode	OTHER
Specimen Holder Model	?
Nominal Magnification	?
Calibrated Magnification	?
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details	?

Imaging Experiment

Task	Software Package	Version
PARTICLE SELECTION	cryoSPARC	v3.3.2
CTF CORRECTION	cryoSPARC	v3.3.2
MODEL FITTING	UCSF Chimera	1.17
MODEL REFINEMENT	PHENIX	1.19.2
INITIAL EULER ASSIGNMENT	cryoSPARC	v3.3.2
FINAL EULER ASSIGNMENT	cryoSPARC	v3.3.2
RECONSTRUCTION	cryoSPARC	v3.3.2

Image Processing

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