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Substrate-engaged 26S proteasome structures reveal mechanisms for ATP-hydrolysis-driven translocation. de la Peña AH, Goodall EA et al. Science. 2018 Nov 30;362(6418). pii: eaav0725.

4D cell biology: big data image analytics and lattice light-sheet imaging reveal dynamics of clathrin-mediated endocytosis in stem cell-derived intestinal organoids. Schöneberg J, Dambournet D et al. Mol Biol Cell. 2018 Nov 26;29(24):2959-2968.

Structural basis for cholesterol transport-like activity of the Hedgehog receptor Patched. Zhang Y, Bulkley DP et al. Cell. 2018 Nov 15;175(5):1352-1364.e14.

Cryo-EM structure of the Ebola virus nucleoprotein-RNA complex at 3.6 Å resolution. Sugita Y, Matsunami H et al. Nature. 2018 Nov 1;563(7729):137-140.

Evolutionary shift toward protein-based architecture in trypanosomal mitochondrial ribosomes. Ramrath DJF, Niemann M et al. Science. 2018 Oct 26;362(6413). pii: eaau7735.

See also: RCSB PDB Images
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News

August 7, 2018

ChimeraX version 0.7 is available. See the change log for what's new.

July 13, 2018

New Virtual Reality at UCSF website shares information on VR projects, resources, and related issues.

April 6, 2018

ChimeraX version 0.6 is available. See the change log for what's new.

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UCSF ChimeraX

UCSF ChimeraX (or simply ChimeraX) is the next-generation molecular visualization program from the Resource for Biocomputing, Visualization, and Informatics (RBVI), following UCSF Chimera. ChimeraX can be downloaded free of charge for academic, government, nonprofit, and personal use. Commercial users, please see licensing.

ChimeraX development is supported in part by grants from the National Institutes of Health (currently R01-GM129325, previously P41-GM103311).

Feature Highlight

Morphing Movie

Morphing between atomic structures can be calculated wih the morph command and played back in an animation. This movie shows morphing between two conformations of the FGFR1 kinase domain:

  • inactive structure (PDB 3C4F, chain A)
  • activated structure (PDB 3GQI, chain A) with phosphorylated tyrosines and bound ATP analog
The tyrosine side chains and ATP analog are color-coded by element: light blue carbon, red oxygen, blue nitrogen, and orange phosphorus.

Morphing and other setup was done with the command file kmorph-prep.cxc, followed by interactively positioning the structure and saving the view, then running kmorph-play.cxc to add 2D labels and record the movie.

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Example Image

neuraminidase flowers

Potassium Channel-Calmodulin Complex

KCNQ1 is the pore-forming subunit of a cardiac potassium channel. It binds to calmodulin, and mutations in either of these proteins can cause congenital long QT syndrome, a dangerous propensity for irregular heartbeats. In the image, a structure of the KCNQ1/calmodulin complex (PDB 5vms) has been assembled into the native tetrameric form with the sym command. The view is from the cytoplasmic side, with KCNQ1 shown as surfaces, calmodulin as cartoons, and calcium ions as balls. A pastel palette from ColorBrewer has been used to color the surfaces, darkened with color modify for the cartoons, and “rotated” 45° in hue for the ions. See the command file colormod.cxc.

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