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Cross-neutralization of SARS-CoV-2 by a human monoclonal SARS-CoV antibody. Pinto D, Park YJ et al. Nature. 2020 Jul 9;583(7815):290-295.

Electromechanical coupling in the hyperpolarization-activated K+ channel KAT1. Clark MD, Contreras GF et al. Nature. 2020 Jul 2;583(7814):145-149.

Cryo-EM structure of the human cohesin-NIPBL-DNA complex. Shi Z, Gao H et al. Science. 2020 Jun 26;368(6498):1454-1459.

Structures of cell wall arabinosyltransferases with the anti-tuberculosis drug ethambutol. Zhang L, Zhao Y et al. Science. 2020 Jun 12;368(6496):1211-1219.

The His-Gly motif of acid-sensing ion channels resides in a reentrant 'loop' implicated in gating and ion selectivity. Yoder N, Gouaux E. eLife. 2020 Jun 4;9. pii: e56527.

See also: RCSB PDB Images
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News

June 11, 2020

The ChimeraX 1.0 production release is available! See the change log for what it contains.

May 8, 2020

We have joined the Twitterverse! – @UCSFChimeraX

May 6, 2020

The ChimeraX 1.0 release candidate is available! Please try it and report any issues. 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 is developed with support from National Institutes of Health R01-GM129325 and the Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases.

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 with the command view name p1 (generally a session would also be saved at this point), 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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