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Unexpected receptor functional mimicry elucidates activation of coronavirus fusion. Walls AC, Xiong X et al. Cell. 2019 Feb 21;176(5):1026-1039.e15.

Structure of a bacterial ATP synthase. Guo H, Suzuki T, Rubinstein JL. eLife. 2019 Feb 6;8. pii: e43128.

Structure of a signaling cannabinoid receptor 1-G protein complex. Krishna Kumar K, Shalev-Benami M et al. Cell. 2019 Jan 24;176(3):448-458.e12.

Structural adaptations of photosynthetic complex I enable ferredoxin-dependent electron transfer. Schuller JM, Birrell JA et al. Science. 2019 Jan 18;363(6424):257-260.

Calicivirus VP2 forms a portal-like assembly following receptor engagement. Conley MJ, McElwee M et al. Nature. 2019 Jan 17;565(7739):377-381.

See also: RCSB PDB Images
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News

December 17, 2018

ChimeraX version 0.8 is available. See the change log for what's new.

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.

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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

Cartoon Styles

Cartoon dimensions and shape can be controlled with the command cartoon style. A few possibilities are shown here; alias is convenient for reusing settings, but the cartoon style commands could also be used directly. See also: preset

alias nucrib  cartoon style  nucleic xsect oval width 1.6 thick 1.6
alias cylinders  cartoon style  protein modeh tube rad 2 sides 24
alias licorice  car style  protein modeh default arrows f xsect oval width 1 thick 1
6cmn default cartoon 6cmn nucrib + alpha-helix cylinders 6cmn nucrib + licorice
initial cartoon style
+ nuc stubs
nucrib + cylinders
(protein α-helix tubes)
nucrib + licorice
(no 2°-structure representations)
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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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