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A viral RNA hijacks host machinery using dynamic conformational changes of a tRNA-like structure. Bonilla SL, Sherlock ME et al. Science. 2021 Nov 19;374(6570):955-960.

AKIRIN2 controls the nuclear import of proteasomes in vertebrates. de Almeida M, Hinterndorfer M et al. Nature. 2021 Nov 18;599(7885):491-496.

Dispatched uses Na+ flux to power release of lipid-modified Hedgehog. Wang Q, Asarnow DE et al. Nature. 2021 Nov 11;599(7884):320-324.

Kainate receptor modulation by NETO2. He L, Sun J et al. Nature. 2021 Nov 11;599(7884):325-329.

Mapping the catalytic conformations of an assembly-line polyketide synthase module. Cogan DP, Zhang K et al. Science. 2021 Nov 5;374(6568):729-734.

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December 18, 2020

Chimera production release 1.15 is now available. See the release notes for what's new.

December 11, 2020

The RBVI wishes you a safe and happy holiday season! See our 2020 card and the gallery of previous cards back to 1985.

November 4, 2020

A 1.15 production release candidate is available, including a fix to work with the new PDB fetch locations (see the release notes). Please try it and report any problems.

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Upcoming Events

UCSF Chimera is a program for the interactive visualization and analysis of molecular structures and related data, including density maps, trajectories, and sequence alignments. It is available free of charge for noncommercial use. Commercial users, please see Chimera commercial licensing.

We encourage Chimera users to try ChimeraX for much better performance with large structures, as well as other major advantages and completely new features. ChimeraX includes a significant subset of Chimera features (with more to come, see the missing features list) and is under active development. Users may choose to use both programs, and it is fine to have both installed.

Chimera is no longer under active development, and is only updated for critical maintenance. Chimera development was supported by a grant from the National Institutes of Health (P41-GM103311) that ended in 2018.

Feature Highlight

DNA and netropsin

Molecular Graphics

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Gallery Sample

Peroxiredoxin Wreath

Peroxiredoxins are enzymes that help cells cope with stressors such as high levels of reactive oxygen species. The image shows a decameric peroxiredoxin from human red blood cells (Protein Data Bank entry 1qmv), styled as a holiday wreath.

See also the RBVI holiday card gallery.

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