3 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
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20 * The Jalview Authors are detailed in the 'AUTHORS' file.
23 <title>PDB Viewing</title>
27 <strong>Discovering and Viewing PDB Structures</strong>
29 Jalview can be used to explore the 3D structures of sequences in an
30 alignment by following the steps below:
32 <li>Select the <strong>"3D Structure Data..."</strong> option
33 from a sequence's <a href="../menus/popupMenu.html">pop-up
34 menu</a> to open the <a href="structurechooser.html">Structure
35 Chooser</a> dialog box.
37 <li>If one or more structures exists for the given
38 sequence, the <a href="structurechooser.html">Structure
39 Chooser</a> dialog will open with them listed in the results
42 <li>However, if no structure was found, the <a
43 href="structurechooser.html">Structure Chooser</a> interface
44 will present options for manual association of PDB structures.
48 <li><strong>Selecting Structures</strong><br />You can select
49 the structures that you want to open and view by selecting them
50 with the mouse and keyboard.<br />By default, if structures were
51 discovered, then some will already be selected according to the
52 criteria shown in the drop-down menu. The default criteria is
53 'highest resolution', simply choose another to pick structures in
54 a different way.<br />
56 <li><strong>Viewing Cached Structures</strong><br />If
57 previously downloaded structures are available for your
58 sequences, the structure chooser will automatically offer them
59 via the <strong>Cached PDB Entries</strong> view. If you wish
60 to download new structures, select one of the PDBe selection
61 criteria from the drop-down menu.</li>
63 <li><strong>To view selected structures, click the <strong>"View"</strong>
67 <li>Additional structure data will be downloaded with the
68 EMBL-EBI's dbfetch service</li>
69 <li><a href="siftsmapping.html">SIFTS</a> records will also
70 be downloaded for mapping UniProt protein sequence data to PDB
72 <li>A new structure viewer will open, or you will be
73 prompted to add structures to existing viewers (see <a
74 href="#afterviewbutton">below</a> for details).
79 <strong>Structure Viewers in the Jalview Desktop</strong><br/>
81 <a href="jmol.html">Jmol viewer</a> has been included since Jalview
82 2.3. Jalview 2.8.2 included support for
83 <a href="chimera.html">Chimera</a>, provided it is installed and can
84 be launched by Jalview. The default viewer can be configured in the
85 <a href="preferences.html#structure">Structure tab</a> in the
86 <strong>Tools→Preferences</strong> dialog box.
88 Structure data imported into Jalview can also be processed to
89 display secondary structure and temperature factor annotation. See
90 the <a href="xsspannotation.html">Annotation from Structure</a> page
94 <strong><a name="afterviewbutton">After pressing the
95 'View' button in the Structure Chooser</a></strong><br /> The behaviour of
96 the 'View' button depends on the number of structures selected, and
97 whether structure views already exist for the selected structures or
101 If multiple structures are selected, then Jalview will always create
102 a new structure view. The selected structures will be imported into
103 this view, and superposed with the matched positions from the
104 aligned sequences.<br /> If a <strong>single</strong> PDB structure
105 is selected, one of the following will happen:
109 <li>If no structures are open, then an interactive display of
110 the structure will be opened in a new window.</li>
112 <li>If another structure is already shown for the current
113 alignment, then you will be asked if you want to add and <a
114 href="jmol.html#align"></a> to
115 the structure in the existing view. (<em>new feature in Jalview
119 <li>If the structure is already shown, then you will be
120 prompted to associate the sequence with an existing view of the
121 selected structure. This is useful when working with multi-domain
122 or multi-chain PDB files.</li>
124 <li style="list-style: none">See the <a href="jmol.html">Jmol
125 </a> and <a href="chimera.html">Chimera</a> PDB viewer help pages for
126 more information about the display.
132 <strong>Retrieving sequences from the PDB</strong><br>You can
133 retrieve sequences from the PDB using the <a
134 href="pdbsequencefetcher.html">Sequence Fetcher</a>. The sequences
135 retrieved with this service are derived directly from the PDB 3D
136 structure data, which can be viewed in the same way above. Secondary
137 structure and temperature factor annotation can also be added. <br />
139 <br>Jalview will also read PDB files directly - either in PDB
140 format, or <a href="mmcif.html">mmCIF</a>. Simply load in the file
141 as you would an alignment file. The sequences of any protein or
142 nucleotide chains will be extracted from the file and viewed in the
147 <strong>Associating a large number of PDB files to
148 sequences in an alignment</strong><br /> It is often the case when working
149 with structure alignments that you will have a directory of PDB
150 files, and an alignment involving one or more of the structures. If
151 you drag a number of PDB files onto an alignment in the Jalview
152 desktop, Jalview will give you the option of associating PDB files
153 with sequences that have the same filename. This means, for example,
154 you can automatically associate PDB files with names like '1gaq.pdb'
155 with sequences that have an ID like '1gaq'. <br /> <em>Note:
156 This feature was added in Jalview 2.7</em>
159 <em>Note for Jalview applet users:<br> Due to the applet
160 security constraints, PDB Files can currently only be imported by
161 cut and paste of the PDB file text into the text box opened by the
162 'From File' entry of the structure menu.
167 <strong>Viewing the PDB Residue Numbering</strong><br>
168 Sequences which have PDB entry or PDB file associations are
169 annotated with sequence features from a group named with the
170 associated PDB accession number or file name. Each feature gives the
171 corresponding PDB Residue Number for each mapped residue in the
172 sequence. The display of these features is controlled through the <strong>"View→Sequence
173 Features"</strong> menu item and the <a href="featuresettings.html">Feature
174 Settings dialog box</a>.
179 <strong>Switching between mmCIF and PDB format for
180 downloading files from the PDB</strong><br /> Jalview now employs the <a
181 href="mmcif.html">mmCIF format</a> for importing 3D structure data
182 from flat file and EMBL-PDBe web-service, as recommended by the
183 wwwPDB. If you prefer (for any reason) to download data as PDB files
184 instead, then first close Jalview, and add the following line to
185 your .jalview_properties file:<br />
186 <code> PDB_DOWNLOAD_FORMAT=PDB </code>
187 <br /> When this setting is configured, Jalview will only request
188 PDB format files from EMBL-EBI's PDBe.<br /> <em>mmCIF format
189 file support was added in Jalview 2.10.</em>
193 <em><strong>Outstanding problem with cut'n'pasted
194 files in Jalview 2.6 and Jalview 2.7</strong><br>Structures imported
195 via the cut'n'paste dialog box will not be correctly highlighted
196 or coloured when they are displayed in structure views, especially
197 if they contain more than one PDB structure. See the bug report at
198 http://issues.jalview.org/browse/JAL-623 for news on this problem.</em>