REL PDBe PDBe PDBe 2007-03-28 2007-03-28 2007-06-06 2011-05-26 The eukaryotic translation initiation factors eIF1 and eIF1A induce an open conformation of the 40S ribosome. Passmore LA Schmeing TM Maag D Applefield DJ Acker MG Algire MA Lorsch JR Ramakrishnan V Passmore LA Schmeing TM Maag D Applefield DJ Acker MG Algire MA Lorsch JR Ramakrishnan V The eukaryotic translation initiation factors eIF1 and eIF1A induce an open conformation of the 40S ribosome. MOLECULAR CELL 26 41 50 2007 17434125 doi:10.1016/j.molcel.2007.03.018 S. cerevisiae 40S ribosomal subunit bound to eIF1 and eIF1A S. cerevisiae 40S ribosomal subunit bound to eIF1 and eIF1A monomer 3 1.2 40S
Purified from Saccharomyces cerevisiae.
1.2 ribosome-eukaryote: SSU 40S eIF1 Saccharomyces cerevisiae yeast 0.012 1 monomer true Escherichia coli pTYB2 GO:0003743 IPR001950 eIF1A Saccharomyces cerevisiae yeast 0.017 1 monomer true Escherichia coli pTYB2 GO:0003743 IPR001253 singleParticle particle 7.4
20 mM HEPES-KOH pH 7.4, 100 mM potassium acetate, 2.5 mM magnesium acetate, 2 mM DTT
Quantifoil R2/2, 200 mesh, Cu/Rh
 ETHANE 95 4 OTHER
Vitrification instrument: Vitrobot
40S subunits were incubated on ice at a concentration of 500-750 nM with a five-fold molar excess of each of eIF1 and eIF1A. Samples were diluted to a final concentration of 50 nM or 75 nM immediately before freezing. 4 ul was applied to one side of a glow-discharged grid, blotted on both sides and flash frozen in liquid ethane. FEI TECNAI F20 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 200 2 1.6 5.3 50000.0 GATAN LIQUID NITROGEN 95 objective lens astigmatism was corrected at 200 KODAK SO-163 FILM OTHER 6 82 15
Micrographs were digitized using a KZA scanner (MRC, Cambridge).
 Side entry liquid nitrogen-cooled cryo specimen holder
Particles were manually selected using Ximdisp.
Phase flipping
 C1 22.0 FSC 0.5 CUT-OFF EMAN 31054 490 emd_1347.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 192 192 192 -96 -96 -96 192 192 192 460.8 460.8 460.8 90 90 90 X Y Z -11.9367 15.5124 0.000000000438567 1.0 2.4 2.4 2.4 2.0 Yeast 40S small ribosomal subunit bound to the translation initiation factors eIF1 and eIF1A
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 1S1H RIGID BODY FIT Situs
Protocol: rigid body. A model of S. cerevisiae 40S (PDB 1S1H) was manually placed in the density using Chimera and refined as a rigid structure using Situs.
cross correlation