6MMG | pdb_00006mmg

Diheteromeric NMDA receptor GluN1/GluN2A in the '2-Knuckle-Symmetric' conformation, in complex with glycine and glutamate, in the presence of 1 millimolar EDTA, and at pH 7.4

ELECTRON MICROSCOPY

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4PE5
experimental model	PDB	5TQ0
experimental model	PDB	5I57
experimental model	PDB	5UOW

Sample
Diheteromeric NMDA receptor GluN1/GluN2A in the '2-Knuckle-Symmetric' conformation, in complex with glycine and glutamate, in the presence of 1 milliomolar EDTA, and at pH 7.4

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	sample was blotted for 3 seconds at blot force 1.

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	88979
Reported Resolution (Å)	6.23
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT

Map-Model Fitting and Refinement
Id	1 (4PE5, 5TQ0, 5I57, 5UOW)
Refinement Space
Refinement Protocol	RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K2 BASE (4k x 4k)
Electron Dose (electrons/Å**2)	55

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	2.7
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	SerialEM
CTF CORRECTION	Gctf
MODEL FITTING	UCSF Chimera
MODEL FITTING	PyMOL
MODEL REFINEMENT	PHENIX
MODEL REFINEMENT	Coot
INITIAL EULER ASSIGNMENT	RELION
FINAL EULER ASSIGNMENT	RELION
CLASSIFICATION	RELION
RECONSTRUCTION	cisTEM

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