REL PDBe PDBe PDBe 2013-07-19 2013-08-07 2013-11-20 2013-11-27 Fernandez IS Bai XC Hussain T Kelley AC Lorsch JR Ramakrishnan V Scheres SHW Ribosome initiation complex, initiator factor eiF5B, cryo EM, single particle analysis Fernandez IS Bai XC Hussain T Kelley AC Lorsch JR Ramakrishnan V Scheres SHW SCIENCE 342 1240585 2013 24200810 doi:10.1126/SCIENCE.1240585 EMD-2421 FULLOVERLAP 4v8z FULLOVERLAP Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex with tRNA in the P/I-site and density for all four domains of eIF5B. Reconstruction of 80S-eIF5B-Met-itRNAMet Eukaryotic Translation Initiation Complex with tRNA in the P/I-site and density for all four domains of eIF5B. 2 4.2 4.2 80S-Met-itRNAMet Eukaryotic Translation Initiation Complex false Saccharomyces cerevisiae Baker's Yeast 4.2 4.2 ribosome-eukaryote: ALL eiF5B Saccharomyces cerevisiae Baker's yeast true Escherichia coli singleParticle particle 0.3 7.2

3mM Hepes-KOH, 6.6 mM Tris-acetate pH 7.2, 3 mM NH4Cl, 6.6 mM NH4-acetate, 48 mM K-acetate, 4 mM Mg-acetate, 2.4 mM DTT

NEGATIVE

cryo-EM

Quantifoil grids (2/2) with 3 nm thin carbon on top

ETHANE 100 90 FEI VITROBOT MARK II Blot 2.5 seconds before plunging FEI POLARA 300 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2 1.9 3.9 59000.0 79096.0 GATAN LIQUID NITROGEN 80 90 85 Objective lens astigmatism was corrected at 59,000 times magnification 2013-01-15 FEI FALCON I (4k x 4k) 14 1012 16

Every image is the average of 16 frames recorded by the direct electron detector

Use a newly developed statistical movie processing approach to compensate for beam-induced movement. Use a newly developed statistical movie processing to compensate for beam-induced movement.

Each particle

C1 6.6 OTHER CTFFIND3, RELION

Use a newly developed statistical movie processing approach to compensate for beam-induced movement.

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