3JD5

Cryo-EM structure of the small subunit of the mammalian mitochondrial ribosome


ELECTRON MICROSCOPY

Refinement

RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d9.401
f_angle_d0.304
f_chiral_restr0.028
f_plane_restr0.003
f_bond_d0.001
Sample
small subunit of mitochondrial ribosome
Specimen Preparation
Sample Aggregation StatePARTICLE
Vitrification InstrumentFEI VITROBOT MARK I
Cryogen NameETHANE
Sample Vitrification DetailsPlunged into liquid ethane (FEI VITROBOT MARK I).
3D Reconstruction
Reconstruction MethodSINGLE PARTICLE
Number of Particles307556
Reported Resolution (Å)7
Resolution Method
Other DetailsA total of 866553 particle images were picked and subjected to supervised classification. Based on statistical information derived from Relion classi ...A total of 866553 particle images were picked and subjected to supervised classification. Based on statistical information derived from Relion classification, ~28% of the particles - those with low cross-correlation coefficient values with the 55S reference projections - were removed.
Refinement Type
Symmetry TypePOINT
Point SymmetryC1
Map-Model Fitting and Refinement
Id1 (5AJ3, 3J9M)
Refinement SpaceREAL
Refinement ProtocolFLEXIBLE FIT
Refinement TargetCross-correlation coefficient
Overall B Value
Fitting Procedure
DetailsMETHOD--Flexible fitting REFINEMENT PROTOCOL--rigid body
Data Acquisition
Detector TypeGATAN ULTRASCAN 1000 (2k x 2k)
Electron Dose (electrons/Å**2)9
Imaging Experiment1
Date of Experiment2009-10-10
Temperature (Kelvin)100
Microscope ModelJEOL 3200FS
Minimum Defocus (nm)1000
Maximum Defocus (nm)4500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging ModeBRIGHT FIELD
Specimen Holder ModelGATAN LIQUID NITROGEN
Nominal Magnification60000
Calibrated Magnification59717
SourceFIELD EMISSION GUN
Acceleration Voltage (kV)300
Imaging Details
EM Software
TaskSoftware PackageVersion
MODEL FITTINGMDFF
RECONSTRUCTIONRELION1.2
RECONSTRUCTIONSPIDER
Image Processing
CTF Correction TypeCTF Correction DetailsNumber of Particles SelectedParticle Selection Details
CTFFIND3