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 and funded by the NIH National Center for Research Resources (grant P41-RR01081).

Feature Highlight

Coloring by Conservation

A structure can be colored to show values of an attribute such as conservation in an associated sequence alignment. Different coloring schemes can be applied. Multalign Viewer reads alignments in several formats and automatically associates them with structures in Chimera, allowing for a few residue mismatches. A variety of conservation measures are available. The image includes 2D labels.

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Gallery Sample

G Protein Interface Surface

Heterotrimeric G protein (Protein Data Bank entry 1gg2) with the alpha subunit shown in green, the beta subunit in light blue, and the gamma subunit in brown. The Intersurf tool was used to show the interface between the alpha and beta subunits. The interface surface is colored to show the distance between atoms across the interface (red for closer together, blue for farther apart). (More samples...)