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Recent Citations

A single-stranded architecture for cotranscriptional folding of RNA nanostructures. Geary C, Rothemund PW, Andersen ES. Science. 2014 Aug 15;345(6198):799-804.

Activating mutations in RRAS underlie a phenotype within the RASopathy spectrum and contribute to leukaemogenesis. Flex E, Jaiswal M et al. Hum Mol Genet. 2014 Aug 15;23(16):4315-27.

Enabling membrane protein structure and dynamics with X-ray free electron lasers. Feld GK, Frank M. Curr Opin Struct Biol. 2014 Aug;27C:69-78.

A comprehensive analysis of the Omp85/TpsB protein superfamily structural diversity, taxonomic occurrence, and evolution. Heinz E, Lithgow T. Front Microbiol. 2014 Jul 21;5:370.

Large-scale filament formation inhibits the activity of CTP synthetase. Barry RM, Bitbol AF et al. eLife. 2014 Jul 16;3:e03638.

(Previously featured citations...)

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News

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.

April 23, 2014

A production release candidate (version 1.9) is now available; please try it and report any problems. See the release notes for changes relative to the previous release.

(Previous news...)

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

ambient-only lighting

Ribbon Spline Options

The default ribbon path is a smooth B-spline (transparent tan in the figure), which can diverge from the true positions of the backbone atoms (α-carbons shown as gray balls). A cardinal spline allows tracking the backbone more closely. Without smoothing (light blue), it follows the α-carbons exactly, or it can be combined with some “compromise” smoothing of strand and/or coil. Ribbon spline options can be set with the ribspline command or in the molecule model attributes.

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Gallery Sample

Annotated Green Fluorescent Protein

BILD format was used in Chimera to annotate the barrel structure of green fluorescent protein with its centroid, major axis (red arrow), and an enclosing cylinder (shown with green hoops). The BILD file green.bild was generated with the python program green.py using the coordinates in green.pdb. Gallery entry courtesy of Mike Ess, Yeast Resource Center, University of Washington. (More samples...)