4UQQ | pdb_00004uqq

Electron density map of GluK2 desensitized state in complex with 2S,4R-4-methylglutamate

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3H6G
experimental model	PDB	3G3F
experimental model	PDB	3KG2

Sample
GLUK2

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

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	21360
Reported Resolution (Å)	7.6
Resolution Method
Other Details	COORDINATES FROM 3KG2 WERE FIT AS SEVEN INDEPENDENT RIGID BODIES CONSISTING OF TWO ATD DIMERS FROM PDB ID 3H6G FOUR LBD MONOMERS FROM PDB 3G3F AND A TMD TETRAMER FROM PDB 3KG2 GEOMETRY AND STEREOCHEMISTRY OUTLIERS ARE THOSE PRESENT IN PDB 3H6G 3G3F AND 3KG2 USED FOR RIGID BODY FITS SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2685. (DEPOSITION ID: 12610).
Refinement Type
Symmetry Type	POINT
Point Symmetry	C2

Map-Model Fitting and Refinement
Id	1 (3H6G, 3G3F, 3KG2)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details	METHOD--RIGID BODY REFINEMENT PROTOCOL--X-RAY

Data Acquisition
Detector Type	FEI FALCON II (4k x 4k)
Electron Dose (electrons/Å**2)	25

Imaging Experiment	1
Date of Experiment	2013-08-01
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	2000
Maximum Defocus (nm)	3500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	47000
Calibrated Magnification	47000
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	UCSF Chimera
RECONSTRUCTION	RELION

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	EACH PARTICLE