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Recent Citations

Cryo-electron tomography reveals ciliary defects underlying human RSPH1 primary ciliary dyskinesia. Lin J, Yin W et al. Nat Commun. 2014 Dec 4;5:5727.

Structures of protective antibodies reveal sites of vulnerability on Ebola virus. Murin CD, Fusco ML et al. Proc Natl Acad Sci USA. 2014 Dec 2;111(48):17182-7.

Structure of a designed protein cage that self-assembles into a highly porous cube. Lai YT, Reading E et al. Nat Chem. 2014 Dec;6(12):1065-71.

A network of assembly factors is involved in remodeling rRNA elements during preribosome maturation. Baßler J, Paternoga H et al. J Cell Biol. 2014 Nov 24;207(4):481-98.

A molecular ruler determines the repeat length in eukaryotic cilia and flagella. Oda T, Yanagisawa H et al. Science. 2014 Nov 14;346(6211):857-60.

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Chimera Search

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November 5, 2014

Chimera production release 1.10 is now available. 64-bit builds are 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.

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).

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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

Thermal Ellipsoids

Anisotropic B-factors can be shown as ellipsoids, with ellipsoid axes and radii representing the eigenvectors and eigenvalues of the atomic mean-square displacement matrix. Anisotropic B-factors are read from the input coordinate file (for example, from ANISOU records in a PDB file) and can be displayed with the tool Thermal Ellipsoids or the command aniso. The figure shows ellipsoids scaled to enclose 50% probability for the heme and nearby atoms from PDB entry 1a6m.

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Gallery Sample

Sliced Potassium Channel

Potassium channel (Protein Data Bank entry 1bl8) on a dark slate blue background with potassium ions shown in firebrick. The channel is comprised of four chains. Each chain has been rainbow-colored from blue at the N-terminus to red at the C-terminus, but only the surface of the channel is shown. The surface has been sliced with a per-model clipping plane. The surface cap color is plum except with opacity set to 0.8. The shininess and brightness have been set to 128 and 8, respectively, and the lights on the scene have been moved from their default positions. The subdivision quality (related to the smoothness of the spherical ions) is 5.0, and the molecular surface was computed with probe radius and vertex density set to 1.0 and 6.0, respectively. (More samples...)