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BMAL1-HIF2A heterodimer modulates circadian variations of myocardial injury. Ruan W, Li T et al. Nature. 2025 May 22;641(8064):1017-1028.

Glutamate gating of AMPA-subtype iGluRs at physiological temperatures. Kumar Mondal A, Carrillo E et al. Nature. 2025 May 15;641(8063):788–796.

Molecular basis of influenza ribonucleoprotein complex assembly and processive RNA synthesis. Peng R, Xu X et al. Science. 2025 May 15;388(6748):eadq7597.

Structure of the human TWIK-2 potassium channel and its inhibition by pimozide. Khanra NK, Wang C et al. Proc Natl Acad Sci USA. 2025 May 13;122(19):e2425709122.

High-resolution characterization of ex vivo AAT polymers by solution-state NMR spectroscopy. Lowen SM, Waudby CA et al. Sci Adv. 2025 May 9;11(19):eadu7064.

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News

May 7, 2025

The ChimeraX 1.10 release candidate is available – please try it and report any issues. See the change log for what's new.

March 19, 2025

Wiley most-cited-paper medallion
UCSF ChimeraX: Tools for structure building and analysis is one of the 10 most cited papers published in Protein Science in 2023!

March 1, 2025

Bluesky logo Follow UCSF ChimeraX on BlueSky! @chimerax.ucsf.edu

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Upcoming Events

May 27, 2025

Biophysical Society 1-hr online tutorial: Biophysics101: Visualizing proteins with ChimeraX at 3pm Eastern (requires registration)

June 24, 2025

PDB101 1-hr online tutorial: Introduction to molecular animation at 1pm Eastern, 10am Pacific: (requires registration)


UCSF ChimeraX

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.

Bluesky logo ChimeraX on Bluesky: @chimerax.ucsf.edu

Feature Highlight

4hhb ambient lighting

Ambient Occlusion Molecular Surfaces

Several lighting modes are available, including ambient occlusion. The image shows hemoglobin (PDB 4hhb) with the four chains shown as surfaces of different colors and heme residues as spheres. The command lighting soft or the Graphics icon can be used to turn on ambient shadowing from 64 directions. The command lighting gentle gives a similar result, except tuned to emphasize larger indentations.

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Example Image

photosynthetic reaction center

Photosynthetic Reaction Center

The photosynthetic reaction center from a purple sulfur bacterium is shown as a cartoon with “tube” helices and membrane boundaries from the OPM database (Orientations of Proteins in Membranes, entry 1eys). Blue and red balls represent the cytoplasmic and periplasmic sides of the bacterial inner membrane, respectively. The title and other text labels were added with the 2dlabels command and repositioned interactively with the move label mouse mode . ChimeraX session file: prc.cxs

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