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Recent Citations

Structural basis of long-range to short-range synaptic transition in NHEJ. Chen S, Lee L et al. Nature. 2021 May 13;593(7858):294-298.

DPP9 sequesters the C terminus of NLRP1 to repress inflammasome activation. Hollingsworth LR, Sharif H et al. Nature. 2021 Apr 29;592(7856):778-783.

Structural basis of malaria RIFIN binding by LILRB1-containing antibodies. Chen Y, Xu K et al. Nature. 2021 Apr 22;592(7855):639-643.

CryoET structures of immature HIV Gag reveal six-helix bundle. Mendonça L, Sun D et al. Commun Biol. 2021 Apr 16;4(1):481.

The molecular basis for sarcomere organization in vertebrate skeletal muscle. Wang Z, Grange M et al. Cell. 2021 Apr 15;184(8):2135-2150.e13.

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News

May 6, 2021

We're looking for somebody to join the ChimeraX development team! Please see the job posting for details.

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.

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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

Multiscale Models

Multiscale Models

The Multiscale Models extension allows Chimera to display large complexes such as virus capsids, ribosomes, and chromatin. It displays the quaternary structure of PDB models and allows subunits to be selected and shown in atomic detail. Matrices are read from PDB files that specify the biological unit. Crystallographic packing can also be shown.

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Gallery Sample

Thermosome

Thermosomes are hollow balls inside which proteins are folded. They are found in the cytosol of eukaryotes and in archaea. Eukaryotic thermosomes have 8 different protein subunits, while archaeal ones are composed of one, two or three different proteins. The one shown from Thermoplasma acidophilum has two distinct proteins colored blue and yellow, each present in 8 copies. The two proteins have 60% sequence identity and are very similar in structure. One monomer is shown as a ribbon. Actin and tubulin are folded by eukaryotic thermosomes.

Protein Data Bank model 1a6d.

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