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Recent Citations

Genetic landscape of esophageal squamous cell carcinoma. Gao YB, Chen ZL et al. Nat Genet. 2014 Oct;46(10):1097-102.

A broad HIV-1 inhibitor blocks envelope glycoprotein transitions critical for entry. Herschhorn A, Gu C et al. Nat Chem Biol. 2014 Oct;10(10):845-52.

A guide to the visual analysis and communication of biomolecular structural data. Johnson GT, Hertig S. Nat Rev Mol Cell Biol. 2014 Oct;15(10):690-8.

Crystal structure of the CRISPR RNA-guided surveillance complex from Escherichia coli. Jackson RN, Golden SM et al. Science. 2014 Sep 19;345(6203):1473-9.

Molecular architecture and mechanism of the anaphase-promoting complex. Chang L, Zhang Z et al. Nature. 2014 Sep 18;513(7518):388-93.

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October 23, 2014

A production release candidate (v1.10) is available; please try it and report any problems. 64-bit builds are now recommended for all capable platforms, and v1.10 will be the last to support OS X 10.6 and 10.7. See the release notes for what's new.

August 15, 2014

We are delighted to announce the publication of a new book, Computational and Visualization Techniques for Structural Bioinformatics Using Chimera, written by Forbes J. Burkowski (University of Waterloo).

May 13, 2014

Chimera production release 1.9 is now available. See the release notes for new features since the 1.8 release series.

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Upcoming Events

UCSF Chimera is a highly extensible program for interactive visualization and analysis of molecular structures and related data, including density maps, supramolecular assemblies, sequence alignments, docking results, trajectories, and conformational ensembles. High-quality images and animations can be generated. Chimera includes complete documentation and several tutorials, and can be downloaded free of charge for academic, government, non-profit, and personal use. Chimera is developed by the Resource for Biocomputing, Visualization, and Informatics, funded by the National Institutes of Health (NIGMS P41-GM103311).

Feature Highlight

Volume Data

Volume Data

Chimera's Volume Viewer displays three-dimensional electron and light microscope data, X-ray density maps, electrostatic potential and other volumetric data. Contour surfaces, meshes and volumetric display styles are provided and thresholds can be changed interactively. Maps can be colored, sliced, segmented, and modifications can be saved. Markers can be placed and structures can be traced. The accompanying image shows a density map of Kelp fly virus from electron microscopy colored radially and with an octant cut out.

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Gallery Sample


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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