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Cryogenic electron tomography reveals novel structures in the apical complex of Plasmodium falciparum. Sun SY, Segev-Zarko L-a et al. mBio. 2024 Apr 10;15(4):e0286423.
Conformational ensemble of yeast ATP synthase at low pH reveals unique intermediates and plasticity in F1-Fo coupling. Sharma S, Luo M et al. Nat Struct Mol Biol. 2024 Apr;31(4):657-666.
Parental histone transfer caught at the replication fork. Li N, Gao Y et al. Nature. 2024 Mar 28;627(8005):890–897.
Comprehensive mutational scanning of EGFR reveals TKI sensitivities of extracellular domain mutants. Hayes TK, Aquilanti E et al. Nat Commun. 2024 Mar 28;15(1):2742.
Structure and function of the Arabidopsis ABC transporter ABCB19 in brassinosteroid export. Ying W, Wang Y et al. Science. 2024 Mar 22;383(6689):eadj4591.
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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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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
One use of Multidomain Assembler is to set up comparative modeling and concatenation of existing structures to generate a full-length model of a multidomain protein. However, even without model-building, the byproduct is also useful: a visual summary of the structures available for a query sequence, optionally filtered by criteria such as BLAST score and % identity, laid out horizontally in approximate N→C order relative to the query. Overlapping hits are stacked vertically, and segments without structural coverage are indicated with spheres. By default, the multiple sequence alignment of the hits to the query is also displayed.
The figure shows the results of command:
mda p08648 ~/Desktop/MDA limit 4 percent 50
with sequence mismatches in red and molecules other than the hit
chains in blue. Text and pointers have been added with
2D
Labels.
Multidomain Assembler is described in a paper.
(More features...)Gallery Sample
Mutations that inactivate the tumor suppressor p53 are found in over 50% of human cancers, and most of the cancer-associated mutations are within its DNA-binding domain. The image shows a tetramer of the p53 DNA-binding domain complexed with DNA (Protein Data Bank entry 2ac0). The tetramer subunits are shown as light blue, green, orange, and yellow ribbons, with red spheres marking several major "hot spots" of mutation. The DNA is shown in purple and blue. (More samples...)
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