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Structural basis of lipid head group entry to the Kennedy pathway by FLVCR1. Son Y, Kenny TC et al. Nature. 2024 May 16;629(8012):710–716.

Structural and molecular basis of choline uptake into the brain by FLVCR2. Cater RJ, Mukherjee D et al. Nature. 2024 May 16;629(8012):704–709.

Promiscuous G-protein activation by the calcium-sensing receptor. Zuo H, Park J et al. Nature. 2024 May 9;629(8011):481–488.

Structural insights into vesicular monoamine storage and drug interactions. Ye J, Chen H et al. Nature. 2024 May 2;629(8010):235–243.

Ciliopathy patient variants reveal organelle-specific functions for TUBB4B in axonemal microtubules. Dodd DO, Mechaussier S et al. Science. 2024 Apr 26;384(6694):eadf5489.

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October 30-31, 2023

Planned downtime: The Chimera and ChimeraX websites and associated web services will be unavailable Oct 30 8am PDT – Oct 31 11:59pm PDT.

April 19, 2023

Chimera production release 1.17.1 is now available, fixing an issue with 1.17 for Windows and Linux. See the release notes for details.

April 13, 2023

Chimera production release 1.17 is now available. Updating is required to keep using the tools that run Blast Protein, Modeller, and multiple sequence alignment with Clustal Omega or MUSCLE, as these will soon stop working in older versions. See the release notes for details.

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Please note that UCSF Chimera is legacy software that is no longer being developed or supported. Users are strongly encouraged to try UCSF ChimeraX, which is under active development.

UCSF Chimera is a program for the interactive visualization and analysis of molecular structures and related data, including density maps, trajectories, and sequence alignments. It is available free of charge for noncommercial use. Commercial users, please see Chimera commercial licensing.

We encourage Chimera users to try ChimeraX for much better performance with large structures, as well as other major advantages and completely new features in addition to nearly all the capabilities of Chimera (details...).

Chimera is no longer under active development. Chimera development was supported by a grant from the National Institutes of Health (P41-GM103311) that ended in 2018.

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.

(More features...)

Gallery Sample

Molecular Bracelet

Eukaryotic initiation factor (eIF) complex (from Protein Data Bank entry 1rf8) in which eIF4E, shown with blue ribbons, is completely encircled by eIF4G, shown with yellow ribbons and red molecular surface (image creation details). (More samples...)


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