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Featured Citations
Structural dynamics of DNA unwinding by a replicative helicase. Shahid T, Danazumi AU et al. Nature. 2025 May 1;641(8061):240–249.
Cryo-EM reveals mechanisms of natural RNA multivalency. Wang L, Xie J et al. Science. 2025 May 1;388(6746):545-550.
Base-modified nucleotides mediate immune signaling in bacteria. Zeng Z, Hu Z et al. Science. 2025 Apr 25;388(6745):eads6055.
Structural mechanism of LINE-1 target-primed reverse transcription. Ghanim GE, Hu H et al. Science. 2025 Apr 25;388(6745):eads8412.
Bacterial pathogen deploys the iminosugar glycosyrin to manipulate plant glycobiology. Sanguankiattichai N, Chandrasekar B et al. Science. 2025 Apr 18;388(6744):297-303.
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UCSF ChimeraX (or simply ChimeraX) is the next-generation molecular visualization program from the Resource for Biocomputing, Visualization, and Informatics (RBVI), following UCSF Chimera. ChimeraX can be downloaded free of charge for academic, government, nonprofit, and personal use. Commercial users, please see ChimeraX commercial licensing.
ChimeraX is developed with support from National Institutes of Health R01-GM129325.
ChimeraX on Bluesky:
@chimerax.ucsf.edu
Feature Highlight
Worms are specialized cartoons in which “fatness” reflects the values of an attribute such as bfactor or seq_conservation. In the example image, the average atomic B-factor per amino acid residue is shown with both coloring and worms. The structure is a trimer of E. coli porin (PDB 1pho). For image setup, see the command file worms.cxc.
Worms are available in ChimeraX v1.8 daily builds 3/12/24 and newer. Worms and coloring by attribute can be done with the Render by Attribute tool or commands cartoon byattribute (aka worm) and color byattribute.
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Example Image
Influenza neuraminidase is an enzyme that promotes the spread of influenza virus among host cells. It is the target of oseltamivir and related antiviral drugs. The image shows tetramers of neuraminidase (PDB 3k3a) styled as flowers. Three tetramers are in different shades of pink, with a central metal ion in white and nearby residues in yellow, and a fourth tetramer is colored green to resemble leaves. Each monomer or “petal” is a six-bladed β-propeller. For image setup other than orientation, see the command file flowers.cxc. The Chimera Image Gallery includes a similar image.
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