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Ligand-triggered allosteric ADP release primes a plant NLR complex. Wang J, Wang J et al. Science. 2019 Apr 5;364(6435). pii: eaav5868.

Coupling of ssRNA cleavage with DNase activity in type III-A CRISPR-Csm revealed by cryo-EM and biochemistry. Guo M, Zhang K et al. Cell Res. 2019 Apr;29(4):305-312.

Structural basis of lipopolysaccharide extraction by the LptB2FGC complex. Li Y, Orlando BJ, Liao M. Nature. 2019 Mar 28;567(7749):486-490.

3D printed absorber for capturing chemotherapy drugs before they spread through the body. Oh HJ, Aboian MS et al. ACS Cent Sci. 2019 Mar 27;5(3):419-427.

Structures of human Nav1.7 channel in complex with auxiliary subunits and animal toxins. Shen H, Liu D et al. Science. 2019 Mar 22;363(6433):1303-1308.

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News

November 17, 2018

Chimera production release 1.13.1 is now available; see the release notes for what's new. The Mac version requires OS 10.10 or later.

October 22, 2018

Mac users: the 1.13.1 release candidate and recent daily builds contain a fix for Mojave (OS 10.14). These versions require OS 10.10 or later.

September 21, 2018

Mac users are advised to hold off upgrading to Mojave until we find a fix for Chimera buttons not being shown until the windows containing them are resized.

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

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

Feature Highlight

sequence alignment structure

Sequence Viewer

The Multalign Viewer tool displays individual sequences and multiple sequence alignments. Sequence alignments can be read from external files (several formats) or created by other tools in Chimera. Structures opened in Chimera are automatically associated with sufficiently similar sequences in the alignment. After association,

  • mousing over a residue in the sequence shows its structure residue number
  • selecting in the sequence selects residues in the structure(s) and vice versa
  • structures can be superimposed using the sequence alignment
Various measures of sequence conservation and structural variation (RMSD) can be computed and shown above the sequences as histograms, and on the structures with color or worm radius. Secondary structure elements can be depicted as colored boxes or regions on the alignment. Regions can also be created by hand.

(More features...)

Gallery Sample

Cavity and Tunnel Detection

Side-by-side views of a potassium channel structure (Protein Data Bank entry 1bl8) showing different approaches to cavity detection. On the left are molecular surface patches corresponding to the structure's two largest pockets by MS volume in the Computed Atlas of Surface Topography of proteins (CASTp) database. On the right is a tunnel in blue identified by the MolAxis server. Simple editing converted MolAxis output into a BILD file for display in Chimera. (More samples...)


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