REL PDBe PDBe PDBe 2012-07-06 2012-07-25 2012-07-25 2012-08-01 Bacterial chemoreceptor arrays are hexagonally packed trimers of receptor dimers networked by rings of kinase and coupling proteins Briegel A Li X Bilwes AM Hughes KT Jensen GJ Crane BR chemotaxis, signal transduction, two-component systems Briegel A Li X Bilwes AM Hughes KT Jensen GJ Crane BR Bacterial chemoreceptor arrays are hexagonally packed trimers of receptor dimers networked by rings of kinase and coupling proteins. PROC.NAT.ACAD.SCI.USA 109 3766 3771 2012 22355139 doi:10.1073/pnas.1115719109 Bacterial chemoreceptor arrays Bacterial chemoreceptor arrays Trimers of receptor dimers lie at the vertices of a hexagonal lattice in a two-facing-two configuration surrounding a ring of alternating CheA regulatory domains (P5) and CheW couplers 3 cheA Escherichia coli MG1655 Inner membrane false cheW Escherichia coli MG1655 Inner membrane false Chemoreceptors Escherichia coli MG1655 Inner membrane false subtomogramAveraging
Tryptone Broth (10 g Tryptone, 5 g NaCl per liter). Cells were grown to exponential phase and incubated with penicillin for 1 hour prior to freezing
R 2/2 copper/Rhodium grids, glow discharged
 ETHANE 100 FEI VITROBOT MARK III FEI POLARA 300 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 2.2 10.0 34000.0 OTHER 77 Gif 2002 hybrid (Gatan) 0.0 20.0 2008-01-15 GATAN ULTRASCAN 4000 (4k x 4k) 150 -70 58
CTF correction in imod. Average number of tilts used in the 3D reconstructions: 130. Average tomographic tilt angle increment: 1.
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 emd_2158.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 36 36 60 0 0 0 36 36 60 233.28 233.28 388.8 90.0 90.0 90.0 X Y Z 155.039993290000012 168.389999390000014 161.905410770000003 1.43633509 6.48 6.48 6.48 164.0 AUTHOR 3-fold average of wild-type E.coli (strain RP437) Chemoreceptor array sub-volumes (composed of 6 trimers-of receptor dimers)
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 3UR1 A B C D RIGID BODY FIT
Protocol: rigid body
REAL