7MFT | pdb_00007mft

Glutamate synthase, glutamate dehydrogenase counter-enzyme complex (GudB6-GltA6-GltB6)

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3K8Z
experimental model	PDB	1OFD
experimental model	PDB	6S6T

Refinement

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	4.605
f_angle_d	0.525
f_chiral_restr	0.04
f_plane_restr	0.004
f_bond_d	0.002

Sample
GudB-GltA-GltB

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	11878
Reported Resolution (Å)	3.9
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT

Map-Model Fitting and Refinement
Id	1 (3K8Z, 1OFD, 6S6T)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target
Overall B Value
Fitting Procedure
Details	Real-space refinement involved iterative rounds of ISOLDE, Coot and PHENIX refinement. 1OFD and 6S6T were used as templates for homology modeling in SWISS-MODEL.

Data Acquisition
Detector Type	GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å**2)	47.7

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	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	UCSF Chimera	1.15
MODEL REFINEMENT	ISOLDE	1.1.0
MODEL REFINEMENT	PHENIX	1.19.1-4122
MODEL REFINEMENT	Coot	0.9.3

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		60487