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Recent Citations

Atomic model for the dimeric FO region of mitochondrial ATP synthase. Guo H, Bueler SA, Rubinstein JL. Science. 2017 Nov 17;358(6365):936-940.

Customizable de novo design strategies for DOCK: Application to HIVgp41 and other therapeutic targets. Allen WJ, Fochtman BC et al. J Comput Chem. 2017 Nov 15;38(30):2641-2663.

Structure of the mitochondrial inner membrane AAA+ protease YME1 gives insight into substrate processing. Puchades C, Rampello AJ et al. Science. 2017 Nov 3;358(6363). pii: eaao0464.

Design of coiled-coil protein-origami cages that self-assemble in vitro and in vivo. Ljubetič A, Lapenta F et al. Nat Biotechnol. 2017 Nov;35(11):1094-1101.

Solvatochromism and preferential solvation of Brooker's merocyanine in water-methanol mixtures. Tanaka Y, Kawashima Y et al. J Comput Chem. 2017 Oct 30;38(28):2411-2419.

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Chimera Search

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October 24, 2017

Chimera production release 1.12 is now available (64-bit builds for Windows, Mac, and Linux). See the release notes for details.

September 12, 2017

A production release candidate (version 1.12) is available; please try it and report any problems. See the release notes for what's new.

March 13, 2017

For a nice 3D-printing protocol that uses Chimera, see 3D Printing of Biomolecular Models for Research and Pedagogy by Da Veiga Beltrame, Tyrwhitt-Drake, et al. today in JoVE!

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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, nonprofit, and personal use. Chimera is developed by the Resource for Biocomputing, Visualization, and Informatics (RBVI), funded by the National Institutes of Health (NIGMS P41-GM103311).

UCSF ChimeraX (or simply ChimeraX) is the next-generation molecular visualization program from the RBVI, following UCSF Chimera.

Feature Highlight

structure-based sequence alignment superimposed structures

Structure-Based Sequence Alignment

Given two or more superimposed structures, Match→Align creates a corresponding sequence alignment. The user specifies a distance cutoff for residues allowed to be in the same column of the output alignment. In proteins, the distances are measured between α-carbons. The method is independent of residue types and how the structures were superimposed.
The figure shows a superposition from MatchMaker of five proteins from the SCOP WD40 superfamily and a corresponding sequence alignment from Match→Align, automatically shown in Multalign Viewer. In the sequence alignment, light green and yellow boxes indicate strands and helices, while the headers RMSD and Conservation show spatial and sequence conservation, respectively.

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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...)