6FEC

Human cap-dependent 48S pre-initiation complex

ELECTRON MICROSCOPY

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Refinement

RMS Deviations
Key	Refinement Restraint Deviation
r_long_range_B_refined	63.439
r_long_range_B_other	63.439
r_dihedral_angle_2_deg	41.463
r_scangle_other	37.154
r_mcangle_it	32.731
r_mcangle_other	32.731
r_dihedral_angle_3_deg	20.998
r_scbond_it	19.883
r_scbond_other	19.883
r_mcbond_it	18.674
r_mcbond_other	18.673
r_dihedral_angle_4_deg	15.942
r_dihedral_angle_1_deg	9.592
r_angle_refined_deg	1.915
r_angle_other_deg	1.376
r_chiral_restr	0.15
r_bond_refined_d	0.018
r_gen_planes_refined	0.009
r_bond_other_d	0.006
r_gen_planes_other	0.005
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Sample
human cap-dependent 48S translation pre-initiation complex
Sample Components
human cap-dependent 48S translation pre-initiation complex
mRNA
Eukaryotic translation initiation factor 4B

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

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	50604
Reported Resolution (Å)	6.3
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	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	Cross-correlation coefficient
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	FEI FALCON II (4k x 4k)
Electron Dose (electrons/Å**2)	30

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	1500
Maximum Defocus (nm)	4000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification	112000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
PARTICLE SELECTION	EMAN	2.1
CTF CORRECTION	CTFFIND	4
MODEL FITTING	UCSF Chimera	1.10
MODEL REFINEMENT	REFMAC	5.8.0194
INITIAL EULER ASSIGNMENT	RELION	1.4
FINAL EULER ASSIGNMENT	RELION	1.4
CLASSIFICATION	RELION	1.4
RECONSTRUCTION	RELION	1.4

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