Volvox Mac OS

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This short guide should hopefully be enough to get you started using JBrowse. If you run into trouble, please visit the GMOD wiki for extended documentation and troubleshooting information, or join the gmod-ajax mailing list and ask a question about it.

Contents

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Download and Uncompress JBrowse

Skip this step if you are reading this page on your own server, since you have already downloaded and uncompressed JBrowse.

Get JBrowse from jbrowse.org.

You will want to put JBrowse under a directory that's served by your web server (e.g. /var/www/ on Debian or Ubuntu systems, /var/www/html on Red Hat, Fedora, or SUSE).

For example, you could make a web-accessible directory to hold your work called /var/www/jbrowse, give your user access to it, and then fetch and uncompress a copy of JBrowse (about 3MB) there:

Once you finish running that, you should try to read this tutorial (which is included in the JBrowse zip file) on your own web server by navigating to something like http://your.machine.address/jbrowse/JBrowse-1.8.0/docs/tutorial/index.html.

Also, please note that JBrowse generates files with links that are relative to the main JBrowse-1.x.x directory (where index.html is located), so you should run all scripts from this directory.

Run setup.sh

To get started with a working JBrowse running on example Volvox data, on machines running Linux or Mac OS X one can simply run:

./setup.sh
which tries to automatically install the Perl prerequisites, format the Volvox example data, and install JBrowse WIG and BAM support (which require additional dependencies and compilation that can be a bit tricky).

If it says the Volvox example data was successfully formatted (even if the WIG or BAM support setup failed) you can navigate to the example Volvox JBrowse. If you see a genome browser with Volvox data in it, congratulations! You have a working JBrowse installation. Read on to Reference Sequences for how to format your own data for use with JBrowse.

Volvo Macon

If one or more of the setup steps failed, try reading through the setup.log file for details of what went wrong, and consulting the JBrowse Troubleshooting page on the GMOD wiki for what to do. It is always safe to run ./setup.sh again after correcting a problem.

Now, if you can see the Volvox test data, your JBrowse is working.

Reference Sequences

Before loading annotation data, format your reference sequences for JBrowse using bin/prepare-refseqs.pl.

For FASTA format sequence files
For sequences already stored in a Bio::DB::* database
See the configuration file reference for more details on how these configuration files work.

General-Purpose Features

JBrowse can import feature data from flat files, or from databases that have Bio::DB::* Perl interfaces.

bin/biodb-to-json.pl
If you have a genomic annotation database such as Chado, Bio::DB::SeqFeature::Store, or Bio::DB::GFF, then you can use JBrowse's biodb-to-json.pl. You use bin/biodb-to-json.pl with a configuration file (documented here).
bin/biodb-to-json.pl --conf docs/tutorial/conf_files/volvox.json
bin/flatfile-to-json.pl
If you have flat files like GFF3 or BED, it is usually best to use JBrowse's flatfile-to-json.pl. bin/flatfile-to-json.pl doesn't use a configuration file; instead, per-track settings are given as command-line arguments. Run bin/flatfile-to-json.pl --help to see a description of the available settings. Most of them correspond to track settings in the config file used by biodb-to-json.pl, so see the track settings section in the config file documentation for more details.

Next-gen reads (BAM)

JBrowse can display alignments directly from BAM files, with no pre-processing necessary. Simply add a stanza with the relative URL of the file to your trackList.json file, of the form:

Note: BAM files are required to be sorted and indexed (i.e. have a corresponding .bai file).

JBrowse has two main track types that are designed especially for use with BAM data:

Alignments2
Shows individual alignments from the BAM file, as well as insertions, deletions, skipped regions, and SNPs encoded in the BAM's MD or CIGAR fields.
SNPCoverage
Shows a coverage histogram plot, with colored bars showing the locations of base-level mismatches and possible SNPs in the reads.
To use them, set 'type': 'Alignments2' or 'type': 'SNPCoverage' in the track configuration.

Index Names

After loading feature data, to let users find features by typing feature names or IDs in the autocompleting search box, a special index of feature names must be generated using bin/generate-names.pl.

bin/generate-names.pl -v

Note: You need to re-run bin/generate-names.pl to add new feature names to the index every time you add new annotations to JBrowse using any of the *-to-json.pl scripts.

And that's all, for basic usage. Visit the main page to view the results.

Quantitative tracks (BigWig and Wiggle)

JBrowse can display alignments directly from BigWig files, with no pre-processing necessary. Simply add a stanza with the relative URL of the file to your trackList.json file, of the form:

JBrowse has two track types that are designed especially for use with quantitative data:

JBrowse/View/Track/Wiggle/XYPlot
Shows quantitative data as a bar graph. See the JBrowse wiki for configuration options.
JBrowse/View/Track/Wiggle/Density
Shows quantitative data as a 'heatmap' plot, which by default draws regions with positive scores as progressively more intense blue, and negative scores as progressively more intense red. See the JBrowse wiki for configuration options, including how to change the color-change point (bicolor_pivot), and the colors.
To use them, set 'type': 'JBrowse/View/Track/Wiggle/XYPlot' or 'type': 'JBrowse/View/Track/Wiggle/Density' in the track configuration.

Wiggle files

For most users, the best way to display a Wiggle (.wig) file is to convert it to BigWig using the tool of their choice, then use the JBrowse BigWig functionality described above to configure JBrowse to display it.

Volvox

Older versions of JBrowse used a script called wig-to-json.pl to convert Wiggle files into PNG images for display by JBrowse. This older method is still supported for backward-compatibility, and is described on the JBrowse wiki.

Troubleshooting

Sometimes things just don't go well. It seems like nothing's ever as easy as it should be. Here are several resources you can use if it turns out that this guide is not enough to get JBrowse working for you.

JBrowse on the GMOD wiki
Contains extended documentation on many aspects JBrowse, including troubleshooting tips.
gmod-ajax@lists.sourceforge.net mailing list
Primary mailing list for JBrowse questions and discussion. If asking questions about a problem running ./setup.sh, please attach your setup.log file.

This page provides a reference guide for 'Desktop JBrowse' or 'JBrowseDesktop', which is a electron applicationthat was unveiled for the release of JBrowse 1.12.0.

The operation of JBrowse Desktop is comparable to other desktop genomebrowsers like IGV or IGB, and it can be run without setting up awebserver (most of the time normal jbrowse runs on apache and is viewedin a web browser). In contrast, JBrowse Desktop is a simple exe filethat can easily be run locally on Windows, Mac OS, or Linux.

Installation

At the most basic level, to set up JBrowse Desktop:

  • Download a zip file script from jbrowse.org e.g. from the latest release athttp://jbrowse.org/blog/. Linux, Windows, and Darwin variants areavailable as JBrowse-1.15.4-desktop--x64.zip.
  • After downloading, unzip the file to somewhere. There is no officialinstaller but you can move it to the Program files or Applicationsdirectory as needed.

Note: on Mac, you can alternatively use Homebrew and run `brew caskinstall jbrowse` which will download and place jbrowse in yourApplication directory

Also note: On Linux, you will need libgconf

See this thread for details https://github.com/electron/electron/issues/1518

Overview of JBrowse Desktop

When you run JBrowse Desktop you will see a sort of 'welcome screen'that gives you several options

  • View Volvox sample data
  • Open sequence file, this allows you to open FASTA, Indexed FASTA, or.2bit
  • Open data directory, this allows you to open a data directory thathas been prepared with normal jbrowse tools

Note: it is highly recommended to use Indexed FASTA (selecting both afasta and a fai file generated by `samtools faidx file.fasta`) or2bit. Even small genomes with normal FASTA will be much slower!

Screenshot

This is the welcome page when you open up the jbrowse app. You can openup sequence files such as fasta, 2bit, or indexed fasta here. Or, youcan open up a pre-existing jbrowse data directory. You can also see alist of past 'sessions' which can be revisited later. The red warning issort of awkward but it does not have any meaning here, it just meansthat you aren't currently in jbrowse main screen

Limitations

  • The 'Save session' function will not save some configurationcustomizations, so if you have advanced customizations it would berecommended to make a data directory by hand the trackList.json andtracks.conf format files
  • If you open a data directory on the web, then 'Save session' won'twork

Features

  • Can open files from shared network folders and external hard driveson both windows and mac
  • Can open files from remote URLs
  • Can open data directories from remote URL
  • Saves 'sessions' to the OS 'application data' folders
  • Has a 'home screen' that lists previous sessions

Technical details

The folder where sessions are saved is generally

  • OSX - '~/Library/Application Support/jbrowse'
  • Windows - 'C:UsersusernameAppDataRoamingjbrowse'

Tested platforms

Volvo Macon Georgia

  • OSX Mavericks
  • macOS sierra
  • Windows 7
  • Windows 10

Note: JBrowse Desktop doesn't work on windows XP and Vista (in fact allelectron apps require Windows 7+)

Volvox Mac Os Catalina

  • JBrowse: a dynamic web platform for genome visualization andanalysispaper




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