REL RCSB RCSB RCSB 2015-02-28 2015-05-27 2016-02-17 2016-04-13 16 Angstrom cryo-EM reconstruction of the alpha, beta, gamma TF55 chaperonin Chaston JJ Stewart AG Smits C Aragao D Struwe W Benesch J Xwong A Ling M Ashsan B Sandin S Rhodes D Molugu SK Molugu SK Bernal RA Stock D TF55 chaperonin, protein folding, Sulfolobus solfataricus, cryo-EM Chaston JJ Smits C Aragao D Wong ASW Ashsan B Sandin S Molugu SK Molugu SK Bernal RA Stock D Stewart AG Structural and Functional Insights into the Evolution and Stress Adaptation of Type II Chaperonins STRUCTURE 24 364 374 2016 26853941 doi:10.1016/j.str.2015.12.016 Cryo-EM reconstruction of the TF55 chaperonin containing the alpha, beta and gamma subunits Cryo-EM reconstruction of the TF55 chaperonin containing the alpha, beta and gamma subunits Octadecamer composed of 6 alpha, 6 beta, and 6 gamma subunits per complex 1 1.08 sequence TF55 chaperonin Sulfolobus solfataricus DSM1617 1
The TF55 chaperonin is composed of three proteins (alpha, beta, and gamma) arranged in an alternating fashion to form a 9-subunit ring (3 of each protein) which then stacks back-to-back with a second ring, forming an 18-subunit complex.
18 octadecamer true Escherichia coli BL21(DE3) pETDUET (Novagen) singleParticle particle 0.5 8.0
20 mM Tris-Cl, pH 8.0, 2 mM MgCl2, 1 mM EDTA, 50 mM NaCl
400-mesh copper grid with holey carbon film support (Quantifoil R2/2)
 ETHANE 80 108 HOMEMADE PLUNGER 3 microliters of sample were blotted off the Quantifoil R2/2 grid for 3 seconds before plunging. JEOL 3200FS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.0 0.8 4.0 60000.0 69000.0 GATAN LIQUID NITROGEN 83 103 93 Objective lens astigmatism was corrected at 250,000 times magnification. JEOL in-column 0.0 20.0 2014-06-20 GATAN ULTRASCAN 4000 (4k x 4k) 15 16534 25 8. 626 Gatan holder
Particle selection was performed using the e2boxer.py component of the EMAN2. Data was ctf-corrected using the ctfit algorithm and refined using EMAN.
Each particle
 OTHER 16.0 OTHER EMAN, EMAN2 16534 100 emd_6291.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 160 160 160 -59 -59 -59 160 160 160 347.84 347.84 347.84 90.0 90.0 90.0 X Y Z -4.29047346 8.94482517 0.0 1.0 2.174 2.174 2.174 1.2 AUTHOR Cryo-EM reconstruction of the Sulfolobus solfataricus TF55 alpha/beta/gamma chaperonin
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