REL RCSB RCSB RCSB 2013-08-26 2013-09-18 2013-09-18 2016-03-02 Cryogenic electron microscopy of cardiac actin:tropomyosin Sousa DR Stagg SM Stroupe ME coiled-coil, actin-binding protein, cytoskeleton Sousa DR Stagg SM Stroupe ME Cryo-EM Structures of the Actin:Tropomyosin Filament Reveal the Mechanism for the Transition from C- to M-State. J.MOL.BIOL. 425 4544 4555 2013 24021812 doi:10.1016/j.jmb.2013.08.020 3j4k FULLOVERLAP rabbit skeletal F-actin bound to chicken gizzard tropomyosin rabbit skeletal F-actin bound to chicken gizzard tropomyosin fourteen actin monomers bind to two tropomyosin coiled-coils 2 Actin, alpha skeletal muscle Oryctolagus cuniculus rabbit skeletal muscle 0.728
F-actin filaments were formed and tropomyosin was bound to the filaments.
filament false P68135 GO:0030240 IPR004000 Tropomyosin alpha-1 Gallus gallus Chicken gizzard 0.728
F-actin filaments were formed and tropomyosin was bound to the filaments.
filament false P19352 GO:0005862 IPR000533 singleParticle filament 0.5 7.1
70 mM NaCl, 3 mM MgCl2, 0.2 mM EGTA, 5 mM NaH2PO4, 5 mM PIPES buffer
Quantifoil 2/2 sized holes
 ETHANE 100 120 FEI VITROBOT MARK IV Blot with calcium-free filter paper for 2.5 seconds before plunging. FEI TITAN KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 120 1.5 4.0 59000.0 101555.0 FEI TITAN KRIOS AUTOGRID HOLDER 2011-03-02 GATAN ULTRASCAN 4000 (4k x 4k) 700 30
Images are recorded on a Gatan Ultrascan 4000 CCD and are available upon request to MES (mestroupe@bio.fsu.edu)
Filaments were selected by hand via points along each filament and then boxed at even intervals.
Micrograph
 27.5 166.6 C1 OTHER 8.0 FSC 0.5 CUT-OFF Matlab, SPIDER, EMAN 224337 emd_5751.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 256 256 256 0 0 0 256 256 256 378.112 378.112 378.112 90.0 90.0 90.0 X Y Z -0.10712808 32.032436369999999 0.0 0.99999994 1.477 1.477 1.477 2.1 AUTHOR Reconstruction of rabbit skeletal muscle F-actin with chicken gizzard (smooth) muscle tropomyosin. A B-factor of -487 Angstrom^2 and an 8-Angstrom low pass filter were applied.
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 4A7F A B D E F H I RIGID BODY FIT Chimera Fit-in-Map
The F-actin and tropomyosin were fitted separately.
Cross correlation REAL