Viewing PDB Structures
-Jalview can view protein structures associated with a sequence via the "Structure→View - PDB entry:" entries from a sequence's pop-up menu. This will open an - interactive display of the structure in a new window, or prompt you - to associate the sequence with an existing view of the selected - structure. See the Jmol PDB viewer help page - for more information about the display. -
-To associate PDB files with a sequence, right click on a sequence ID and select - "Structure→ Associate Structure with Sequence", - and one of the submenus:
-+ Discovering and Viewing PDB Structures +
+ Jalview can be used to explore the 3D structures of sequences in an + alignment by following the steps below: +
+ Structure Viewers in the Jalview Desktop
+ The
+ Jmol viewer has been included since Jalview
+ 2.3. Jalview 2.8.2 included support for
+ Chimera, provided it is installed and can
+ be launched by Jalview. The default viewer can be configured in the
+ Structure tab in the
+ Tools→Preferences dialog box.
+
+ Structure data imported into Jalview can also be processed to + display secondary structure and temperature factor annotation. See + the Annotation from Structure page + for more information. +
+
+ After pressing the
+ 'View' button in the Structure Chooser
The behaviour of
+ the 'View' button depends on the number of structures selected, and
+ whether structure views already exist for the selected structures or
+ aligned sequences.
+
+ If multiple structures are selected, then Jalview will always create
+ a new structure view. The selected structures will be imported into
+ this view, and superposed with the matched positions from the
+ aligned sequences.
If a single PDB structure
+ is selected, one of the following will happen:
+
Importing PDB Entries or files in PDB format
-You can retrieve sequences from the PDB using the Sequence Fetcher. Any sequences retrieved with this
- service are automatically associated with their source database entry. For PDB
- sequences, simply select PDB as the database and enter your known PDB id (appended
- with ':' and a chain code, if desired).
-
Jalview will also read PDB files directly. Simply load in the file
-as you would an alignment file. The sequences of any peptide chains
-will be extracted from the file and viewed in the alignment window.
-
Note for jalview applet users: due to the applet security
-constraints, PDB Files can currently only be imported by cut and paste
-of the PDB file text into the text box opened by the 'From File' entry
-of the structure menu.
Viewing the PDB Residue Numbering
-Sequences which have PDB entry or PDB file associations are annotated
-with sequence features from a group named with the associated PDB
-accession number or file name. Each feature gives the corresponding
-PDB Residue Number for each mapped residue in the seuqence. The
-display of these features is controlled through the
-"View→Sequence Features" menu item
-and the Feature Settings dialog
-box.
+ Retrieving sequences from the PDB
You can
+ retrieve sequences from the PDB using the Sequence Fetcher. The sequences
+ retrieved with this service are derived directly from the PDB 3D
+ structure data, which can be viewed in the same way above. Secondary
+ structure and temperature factor annotation can also be added.
+
+
Jalview will also read PDB files directly - either in PDB
+ format, or mmCIF. Simply load in the file
+ as you would an alignment file. The sequences of any protein or
+ nucleotide chains will be extracted from the file and viewed in the
+ alignment window.
+
+ Associating a large number of PDB files to
+ sequences in an alignment
It is often the case when working
+ with structure alignments that you will have a directory of PDB
+ files, and an alignment involving one or more of the structures. If
+ you drag a number of PDB files onto an alignment in the Jalview
+ desktop, Jalview will give you the option of associating PDB files
+ with sequences that have the same filename. This means, for example,
+ you can automatically associate PDB files with names like '1gaq.pdb'
+ with sequences that have an ID like '1gaq'.
Note:
+ This feature was added in Jalview 2.7
+
+ Note for Jalview applet users:
Due to the applet
+ security constraints, PDB Files can currently only be imported by
+ cut and paste of the PDB file text into the text box opened by the
+ 'From File' entry of the structure menu.
+
+
+ Viewing the PDB Residue Numbering
+ Sequences which have PDB entry or PDB file associations are
+ annotated with sequence features from a group named with the
+ associated PDB accession number or file name. Each feature gives the
+ corresponding PDB Residue Number for each mapped residue in the
+ sequence. The display of these features is controlled through the "View→Sequence
+ Features" menu item and the Feature
+ Settings dialog box.
+
+ Switching between mmCIF and PDB format for
+ downloading files from the PDB
Jalview now employs the mmCIF format for importing 3D structure data
+ from flat file and EMBL-PDBe web-service, as recommended by the
+ wwwPDB. If you prefer (for any reason) to download data as PDB files
+ instead, then first close Jalview, and add the following line to
+ your .jalview_properties file:
+ PDB_DOWNLOAD_FORMAT=PDB
+
When this setting is configured, Jalview will only request
+ PDB format files from EMBL-EBI's PDBe.
mmCIF format
+ file support was added in Jalview 2.10.
+
+ Outstanding problem with cut'n'pasted
+ files in Jalview 2.6 and Jalview 2.7
Structures imported
+ via the cut'n'paste dialog box will not be correctly highlighted
+ or coloured when they are displayed in structure views, especially
+ if they contain more than one PDB structure. See the bug report at
+ http://issues.jalview.org/browse/JAL-623 for news on this problem.
+