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| caption = Chimera main window (FSH and receptor, 1xwd) and sequence window (alignment of FSH receptors from different species).
| caption = Chimera main window (FSH and receptor, 1xwd) and sequence window (alignment of FSH receptors from different species).
| developer = Resource for Biocomputing, Visualization, and Informatics (RBVI), UCSF
| developer = Resource for Biocomputing, Visualization, and Informatics (RBVI), UCSF
| latest_release_version = 1.6.2
| latest_release_version = 1.7
| latest_release_date = {{release date and age|2012|07|06|df=yes}}
| latest_release_date = {{release date and age|2013|01|30|df=yes}}
| latest_preview_version = 1.7
| latest_preview_date = {{release date and age|2013|01|25|df=yes}}
| operating_system = [[Microsoft Windows|Windows]], [[Mac OS X]], [[Linux]]
| operating_system = [[Microsoft Windows|Windows]], [[Mac OS X]], [[Linux]]
| genre = [[Molecular modelling]]
| genre = [[Molecular modelling]]
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* rich set of commands, powerful specification syntax
* rich set of commands, powerful specification syntax
* many formats read, PDB and Mol2 written
* many formats read, PDB and Mol2 written
* web fetch from [[Protein Data Bank]], EDS (density maps), EMDB (density maps), ModBase (comparative models), CASTp (protein pocket measurements), Pub3D (small molecule structures), VIPERdb (icosahedral virus capsids), [[UniProt]] (protein sequences with feature annotations), others
* Web fetch from [[Protein Data Bank]], EDS (density maps), EMDB (density maps), ModBase (comparative models), CASTp (protein pocket measurements), Pub3D (small molecule structures), VIPERdb (icosahedral virus capsids), [[UniProt]] (protein sequences with feature annotations), others
* interfaces to PDB2PQR charge/radius assignment, APBS electrostatics calculations, AutoDock Vina single-ligand docking


== Presentation images and movies ==
== Presentation images and movies ==


* high-resolution images
* high-resolution images
* visual effects including depth-cueing, silhouette edges, lighting, colored backgrounds
* visual effects including depth-cueing, interactive shadows, silhouette edges, multicolor backgrounds
* standard molecular representations (sticks, spheres, ribbons, molecular surfaces)
* stick, ball-and-stick, sphere, ribbon, and surface displays of molecules
* pipes-and-planks for helices and strands; nucleotide objects including lollipops and ladder rungs
* ellipsoids to show anisotropic B-factors
* ellipsoids to show anisotropic B-factors
* nonmolecular geometric objects
* nonmolecular geometric objects
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* scene export to [[X3D]] and other formats
* scene export to [[X3D]] and other formats
* simple graphical interface for creating movies interactively
* simple graphical interface for creating movies interactively
* scenes can be placed as keyframes along an animation timeline
* alternatively, movie content and recording can be scripted
* alternatively, movie content and recording can be scripted; rich set of related commands
* movie recording is integrated with morphing and MD trajectory playback
* movie recording is integrated with morphing and MD trajectory playback


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* density maps can be created from atomic coordinates
* density maps can be created from atomic coordinates
* markers can be placed in maps and connected with smooth paths
* markers can be placed in maps and connected with smooth paths
* display of single data planes, optionally as topographic maps
* display of individual data planes or multiple orthogonal planes
* volume data time series playback and morphing
* volume data time series playback and morphing
* many tools for segmenting and editing maps
* many tools for segmenting and editing maps
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* sequence-structure crosstalk: highlighting in one highlights the other
* sequence-structure crosstalk: highlighting in one highlights the other
* protein [[BLAST]] search via Web service
* protein [[BLAST]] search via Web service
* interface to [[ MODELLER ]] for homology modeling
* interfaces to [[ MODELLER ]] for homology modeling and loop building
* structure superposition with or without pre-existing sequence alignment
* structure superposition with or without pre-existing sequence alignment
* generation of structure-based sequence alignments from multiple superpositions
* generation of structure-based sequence alignments from multiple superpositions

Revision as of 18:05, 7 February 2013

UCSF Chimera
Developer(s)Resource for Biocomputing, Visualization, and Informatics (RBVI), UCSF
Stable release
1.7 / 30 January 2013; 11 years ago (2013-01-30)
Operating systemWindows, Mac OS X, Linux
TypeMolecular modelling
Licensefree for noncommercial use
Websitewww.cgl.ucsf.edu/chimera

UCSF Chimera (or simply Chimera) is an extensible program for interactive visualization and analysis of molecular structures and related data, including density maps, supramolecular assemblies, sequence alignments, docking results, trajectories, and conformational ensembles. High-quality images and movies can be created. Chimera includes complete documentation and can be downloaded free of charge for noncommercial use.

Chimera is developed by the Resource for Biocomputing, Visualization, and Informatics (RBVI) at the University of California, San Francisco. Development is funded by the National Institutes of Health (NIGMS grant P41-GM103311).

General structure analysis

  • automatic identification of atom types
  • hydrogen addition and partial charge assignment
  • high-quality hydrogen bond, contact, and clash detection
  • measurements: distances, angles, surface area, volume
  • calculation of centroids, axes, planes and associated measurements
  • amino acid rotamer libraries, protein Ramachandran plot
  • structure building and bond rotation
  • molecular dynamics trajectory playback (many formats), distance and angle plots
  • morphing between conformations of a protein or even different proteins
  • display of attributes (B-factor, hydrophobicity, etc.) with colors, radii, "worms"
  • easy creation of custom attributes with simple text file inputs
  • ViewDock tool to facilitate interactive screening of docking results
  • rich set of commands, powerful specification syntax
  • many formats read, PDB and Mol2 written
  • Web fetch from Protein Data Bank, EDS (density maps), EMDB (density maps), ModBase (comparative models), CASTp (protein pocket measurements), Pub3D (small molecule structures), VIPERdb (icosahedral virus capsids), UniProt (protein sequences with feature annotations), others
  • interfaces to PDB2PQR charge/radius assignment, APBS electrostatics calculations, AutoDock Vina single-ligand docking

Presentation images and movies

  • high-resolution images
  • visual effects including depth-cueing, interactive shadows, silhouette edges, multicolor backgrounds
  • standard molecular representations (sticks, spheres, ribbons, molecular surfaces)
  • pipes-and-planks for helices and strands; nucleotide objects including lollipops and ladder rungs
  • ellipsoids to show anisotropic B-factors
  • nonmolecular geometric objects
  • renderings of density maps and other volume data (see below)
  • labeling with text, symbols, arrows, color keys
  • different structures can be clipped differently and at any angle
  • optional raytracing with bundled POV-Ray
  • scene export to X3D and other formats
  • simple graphical interface for creating movies interactively
  • scenes can be placed as keyframes along an animation timeline
  • alternatively, movie content and recording can be scripted; rich set of related commands
  • movie recording is integrated with morphing and MD trajectory playback

Volume data tools

  • many formats of volume data maps (electron density, electrostatic potential, others) read, several written
  • interactive threshold adjustment, multiple isosurfaces (mesh or solid), transparent renderings
  • fitting of atomic coordinates to maps and maps to maps
  • density maps can be created from atomic coordinates
  • markers can be placed in maps and connected with smooth paths
  • display of individual data planes or multiple orthogonal planes
  • volume data time series playback and morphing
  • many tools for segmenting and editing maps
  • Gaussian smoothing, Fourier transform
  • measurements: surface area, surface-enclosed volume, map symmetry, others

Sequence-structure tools

  • many sequence alignment formats read, written
  • sequence alignments can be created, edited
  • sequences automatically associate with structures
  • sequence-structure crosstalk: highlighting in one highlights the other
  • protein BLAST search via Web service
  • interfaces to MODELLER for homology modeling and loop building
  • structure superposition with or without pre-existing sequence alignment
  • generation of structure-based sequence alignments from multiple superpositions
  • several methods for calculating conservation and displaying values on associated structures
  • RMSD header (histogram above the sequences) showing variability of associated structures
  • user-defined headers including histograms and colored symbols
  • UniProt feature annotations shown as colored boxes on sequences
  • trees in Newick format read/displayed

See also

Wikimedia Commons has media related to UCSF Chimera.
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