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Difference between revisions of "Load GFF Into Chado"
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<code>load/bin/gmod_bulk_load_gff3.pl</code>. A good set of sample data is the GFF3 file prepared by the nice folks at the [[:Category:SGD|Saccharomyces Genome Database]]: | <code>load/bin/gmod_bulk_load_gff3.pl</code>. A good set of sample data is the GFF3 file prepared by the nice folks at the [[:Category:SGD|Saccharomyces Genome Database]]: | ||
− | : | + | : http://downloads.yeastgenome.org/curation/chromosomal_feature/saccharomyces_cerevisiae.gff |
This file contains [http://geneontology.org Gene Ontology (GO)] annotations, so if you didn't load GO when you executed <code>make ontologies</code> you will get many warning messages about being unable to find entries in the [[Chado_Tables#Table:_dbxref|dbxref]] table. If you want to | This file contains [http://geneontology.org Gene Ontology (GO)] annotations, so if you didn't load GO when you executed <code>make ontologies</code> you will get many warning messages about being unable to find entries in the [[Chado_Tables#Table:_dbxref|dbxref]] table. If you want to | ||
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==Add an Entry for Your Organism== | ==Add an Entry for Your Organism== | ||
− | You will need to have an entry for your species in the [[Chado_Tables#Table:_organism|Chado organism table]]. | + | You will need to have an entry for your species in the [[Chado_Tables#Table:_organism|Chado organism table]]. To add a new organism, run the tool that came with Chado, <code>gmod_add_organism.pl</code> |
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− | + | This script will ask you what information about your organism: | |
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+ | Both genus and species are required; please provide them below | ||
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+ | Organism's genus? | ||
+ | Organism's species? | ||
+ | Organism's abbreviation? [] | ||
+ | Comment (can be empty)? | ||
==Load the GFF3== | ==Load the GFF3== |
Latest revision as of 15:43, 20 July 2015
This HOWTO describes a method for loading sequence annotation data in GFF3 format into a Chado database.
Contents
Download the GFF3 Files
An easy way
to load data into the database is to use a GFF3 file and the script
load/bin/gmod_bulk_load_gff3.pl
. A good set of sample data is the GFF3 file prepared by the nice folks at the Saccharomyces Genome Database:
This file contains Gene Ontology (GO) annotations, so if you didn't load GO when you executed make ontologies
you will get many warning messages about being unable to find entries in the dbxref table. If you want to
load GO you should be able to execute make ontologies
and select Gene Ontology for installation.
Add an Entry for Your Organism
You will need to have an entry for your species in the Chado organism table. To add a new organism, run the tool that came with Chado, gmod_add_organism.pl
This script will ask you what information about your organism:
Both genus and species are required; please provide them below
Organism's genus? Organism's species? Organism's abbreviation? [] Comment (can be empty)?
Load the GFF3
Unless your GFF3 is sorted by location with grouped gene models (gene, mRNA, CDS/exon/UTR), you must first do this. Use this gmod_gff3_preprocessor.pl.
> gmod_gff3_preprocessor.pl --gfffile saccharomyces_cerevisiae.gff --outfile saccharomyces_cerevisiae.sorted.gff
Then execute gmod_bulk_load_gff3.pl
:
>gmod_bulk_load_gff3.pl --organism yeast --gfffile saccharomyces_cerevisiae.sorted.gff
This loads the GFF3 file. The loading script requires GFF3 as it has tighter control of the syntax and requires the use of a controlled vocabulary (from Sequence Ontology Feature Annotation (SOFA)), allowing mapping to the relational schema. In addition to supplying the location of the file with the --gfffile
flag, the --organism
tag uses the common name (common_name
field) from the Chado organism table. Do perldoc gmod_bulk_load_gff.pl
for more information on adding other organisms and databases, as well as other available command line flags.
Note that gmod_load_gff3.pl
is also available, but is limited in how much it has been supported and in how flexible it currently is. It is
a good example of how to write code using Class::DBI classes that are created at the time of install. For more information on using these classes, see Modware for a Class::DBI-based middleware/API.
Creating GFF3 from UniProt/SwissProt Files
A recent update (April 2007) to bp_genbank2gff3.pl
extends it to handle Swiss and EMBL format input, along with GenBank. You can now create GFF3 entries of UniProt sequences suited to loading into Chado, including most of the protein description, Dbxref, and related fields useful in annotating genome matches. Use the --format Uniprot
flag to specify this input format (--format EMBL
can also be useful).
>bp_genbank2gff3.pl --noCDS --in uniprot-subset.dat --format Uniprot >gmod_bulk_load_gff3.pl --database mygenome --gff uniprot-subset.dat.gff --organism fromdata
Use the --organism fromdata
flag to load UniProt with many organisms.
This code needs to be tested. Please help improve this section with your tests.
More Information
See the related HOWTO Load RefSeq Into Chado.
Please send questions to the GMOD developers list:
gmod-devel@lists.sourceforge.net
Or contact the GMOD Help Desk