2019-11-06 REL PDBe PDBe PDBe 2017-09-14 2017-12-20 2017-12-27 2019-11-06 CNRS ATIP-Avenir 2016 France ANR/LABEX ANR-10-LABX-62-IBEID to J.M.G. France European Research Council MolStructTransfo, 281149 France FRM DEQ20140329508 France Inner membrane Bcs complex (E. coli) Krasteva PV Fronzes R Krasteva PV Bernal-Bayard J Travier L Martin FA Kaminski PA Karimova G Fronzes R Ghigo JM Insights into the structure and assembly of a bacterial cellulose secretion system. Nat Commun UK 8 2065 2065 2017 29234007 doi:10.1038/s41467-017-01523-2 2041-1723 EMD-3864 other EM volume
Bcs macrocomplex with additional regulatory subunits
 EMD-3877 associated EM volume Bcs inner membrane sub-complex. Bcs inner membrane sub-complex. 0
Sample purified using BcsA as bait from solubilised E. coli Bl21(DE3) cells over-expressing the BcsRQAB sub-units of cellulose-secreting E. coli 1094.
Escherichia coli 1094 inner membrane Escherichia coli Bl21(DE3) pCDF-Duet 1 singleParticle particle 0.1 8.0
20 mM HEPES 8.0 120 mM NaCl 10 glycerol 5 mM MgCl2 10 uM AppCp 2 uM c-di-GMP 0.008% LM-NPG cOmplete protease inhibitors
 NEGATIVE uranyl acetate
5 ul of sample were spotted on glow-discharged carbon-coated copper grids and incubated for 1 minute. Liquid was blotted off and the sample was passed through 3 drops of 10 ul 2% uranyl acetate with a 30-second incubation over the third. After that the stain was blotted off and the grid was air-dried.
 COPPER CARBON CONTINUOUS GLOW DISCHARGE OTHER
Samples were purified using anti-FLAG affinity gel from detergent-solubilised membranes of E. coli(DE3) cells over-expressing the BcsRQAB subunits of an E. coli 1094-derived strain (pCDF vector, IPTG-inducible overnight expression in TB, affinity tag on BcsA). Eluted samples were further purified by centrifugation over a 10-40% glycerol density gradient.
 FEI TECNAI F20 OTHER BRIGHT FIELD FIELD EMISSION GUN 200 0.5 3.5 50000. NITROGEN FEI FALCON II (4k x 4k) 2 12.0 1 127400
Particles were picked using the automated picking function of EMAN2.0/Boxer.
 EMAN 2.0
CTF correction was carried out in EMAN2.0 (e2ctf) in two rounds, before and after structure factor generation
Initial model was generated using EMAN2.0 (e2initialmodel) using a subset of high contrast class averages following 2D classification in Relion1.4.
 C1 21.1 FSC 0.143 CUT-OFF RELION 1.4 14362 NOT APPLICABLE EMAN 2.0 NOT APPLICABLE 200 RELION 1.4
Particles were saved as an .mrcs stack and subjected to two rounds of 2D classification in Relion. Only high-contrast classes (20182 particles in total) were used for 3D classification with three classes. Two of the classes converged to the same 3D model and the corresponding particles (14362) were used for 3D refinement of the EMAN2.0-generated initial model.
 emd_3877.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 180 180 180 0 0 0 180 180 180 342.0 342.0 342.0 90.0 90.0 90.0 X Y Z -0.09078771 0.12465287 0.00024227778 0.0091167325 1.9 1.9 1.9 0.015 AUTHOR An inner membrane subcomplex of the E. coli cellulose secretion system (Bcs). The complex was purified from solubilised membranes of Bl21(DE3) cells over-expressing the BcsRQAB subunits.