9RWQ | pdb_00009rwq

Ancestral Group III Chaperonin (ACIII) Double-Ring in Open Conformation including the Equatorial and Intermediate Domains (residues 12-200 and 356-507)

ELECTRON MICROSCOPY

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold

Refinement

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	4.647
f_angle_d	0.916
f_chiral_restr	0.046
f_plane_restr	0.007
f_bond_d	0.005

Sample
Ancestral Fibrobacteres-Chlorobi-Bacteroidetes Group Chaperonin (AFCB)

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

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	40850
Reported Resolution (Å)	3.21
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

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

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	48

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	TFS KRIOS
Minimum Defocus (nm)	1000
Maximum Defocus (nm)	2400
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	130000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
PARTICLE SELECTION	Xmipp	3.0
IMAGE ACQUISITION	EPU
CTF CORRECTION	Gctf	3.0
MODEL FITTING	Coot	0.9.8.96
INITIAL EULER ASSIGNMENT	RELION	5.0
INITIAL EULER ASSIGNMENT	cryoSPARC	4.0
FINAL EULER ASSIGNMENT	cryoSPARC	4.0
CLASSIFICATION	RELION	5.0
RECONSTRUCTION	cryoSPARC	4.0
MODEL REFINEMENT	PHENIX	1.20.1_4487:

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		504265