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Featured Citations

SEQCROW: A ChimeraX bundle to facilitate quantum chemical applications to complex molecular systems. Schaefer AJ, Ingman VM, Wheeler SE. J Comput Chem. 2021 Sep 15;42(24):1750-1754.

Nucleolar maturation of the human small subunit processome. Singh S, Vanden Broeck A et al. Science. 2021 Sep 10;373(6560):eabj5338.

Structural basis for piRNA targeting. Anzelon TA, Chowdhury S et al. Nature. 2021 Sep 9;597(7875):285-289.

Structural basis of mismatch recognition by a SARS-CoV-2 proofreading enzyme. Liu C, Shi W et al. Science. 2021 Sep 3;373(6559):1142-1146.

SARS-CoV-2 RBD antibodies that maximize breadth and resistance to escape. Starr TN, Czudnochowski N et al. Nature. 2021 Sep 2;597(7874):97-102.

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News

May 28, 2021

The ChimeraX 1.2 production release is available. See the change log for what's new.

December 11, 2020

The RBVI wishes you a safe and happy holiday season! See our 2020 card and the gallery of previous cards back to 1985.

November 4, 2020

New paper online: UCSF ChimeraX: Structure visualization for researchers, educators, and developers. Pettersen EF, Goddard TD, et al. Protein Sci. 2020, in press.

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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 and the Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases.

Feature Highlight

man and molecule

Virtual Reality

ChimeraX virtual reality works with HTC Vive, Oculus Rift, and Samsung Odyssey systems (those supported by SteamVR). Any structures, maps, etc. that can be displayed in ChimeraX can be viewed in the headset and manipulated with the hand controllers. Icon toolbars visible in the headset allow changing the scene display or hand-controller button assignments with a single click. Besides rotation, translation, and zooming, useful functions include labeling, distance measurement, bond rotation, placing markers into a map, and changing map contour levels. Virtual-reality (VR) mode can be turned on and off with the vr command, and the meeting command allows multiple users to share a single session in VR.

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Example Image

HIV-1 protease B-factor coloring

B-factor Coloring

Atomic B-factor values are read from PDB and mmCIF input files and assigned as attributes that can be shown with coloring and used in atom specification. This example shows B-factor variation within a structure of the HIV-1 protease bound to an inhibitor (PDB 4hvp). For complete image setup, including positioning, color key, and label, see the command file bfactor.cxc.

Additional color key examples can be found in tutorials: Coloring by Electrostatic Potential, Coloring by Sequence Conservation

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