Query HOMOLENS using web applications

Acces to several ACNUC databases: EMBL,GenBank,SwissProt, HOVERGEN, HOGENOM, HOMOLENS, etc.

• WWW-Query Allows to retrieve sequences or families by combining several criteria
• Search families by cross taxa Allows to retrieve families according to complexe taxonomic criteria

Retrieve Tree

Retrieving Tree from Ensembl protein identifier

Query:

Please give an Ensembl protein identifier (for example : ENSCSAVP00000020070 ). The sequence will be signaled in the associated tree.

Query HOMOLENS proteins

You may enter any word ( sequence name, keyword, species, ...)

Protein sequences	Protein families
exact match enter a word	exact match enter a word

Check the box if you want to report exact matches only.

Query HOMOLENS nucleotide sequences

You may enter any word ( sequence name, keyword, species, ...)

CDS sequences	CDS families
exact match enter a word	exact match enter a word

Check the box if you want to report exact matches only.

Query HOMOLENS using BLAST

You may blast your sequence against several databases at PBIL.

• Protein BLAST Allows to retrieve protein sequences in HOMOLENS

Query HOMOLENS using HoSeqI

You may search the HOMOLENS family which is the closest of your sequence. Associated alignment and phylogenetic tree are automatically generated.

• HoseqI Allows to retrieve protein family in HOMOLENS

Orthologs search

You can retrieve orthologous and paralogous genes with the FamFetch application. This is a powerful tool allowing you to request the phylogenic trees database with a complex tree user-build motif including duplication and speciation events. You can use as well a command-line version of FamFetch.

Acces to HOMOLENS

You can query the database on thispage or via several access :

• the PBIL web applications : WWW-Query, Quick-Search, Cross-Taxa
• the FamFetch client-server application, allowing orthologous and paralogous genes selection
• the QueryWin and Raa_Query, two client-server applications (via sockets)
• the seqinR R package (via sockets)

Contents

Organisms

HOMOLENS is build from the Ensembl database:

• Ensembl (Release 60) : Animals from the EBI :
  • Ailuropoda melanoleuca
  • Anolis carolinensis
  • Bos taurus
  • Caenorhabditis elegans
  • Callithrix jacchus
  • Canis lupus familiaris
  • Cavia porcellus
  • Choloepus hoffmanni
  • Ciona intestinalis
  • Ciona savignyi
  • Danio rerio
  • Dasypus novemcinctus
  • Dipodomys ordii
  • Drosophila melanogaster
  • Echinops telfairi
  • Equus caballus
  • Erinaceus europaeus
  • Felis catus
  • Gallus gallus
  • Gasterosteus aculeatus
  • Gorilla gorilla
  • Homo sapiens
  • Lama pacos
  • Loxodonta africana
  • Macaca mulatta
  • Macropus eugenii
  • Microcebus murinus
  • Monodelphis domestica
  • Mus musculus
  • Myotis lucifugus
  • Ochotona princeps
  • Ornithorhynchus anatinus
  • Oryctolagus cuniculus
  • Oryzias latipes
  • Otolemur garnettii
  • Pan troglodytes
  • Pongo pygmaeus
  • Procavia capensis
  • Pteropus vampyrus
  • Rattus norvegicus
  • Saccharomyces cerevisiae
  • Sorex araneus
  • Spermophilus tridecemlineatus
  • Sus scrofa
  • Taeniopygia guttata
  • Takifugu rubripes
  • Tarsius syrichta
  • Tetraodon nigroviridis
  • Tupaia belangeri
  • Tursiops truncatus
  • Xenopus (silurana) tropicalis

Data are modified and re-annotated: gene family , GC contents, internal introns, 3'UTR and 5'UTR informations are added to annotations.

Sequences, Families, Alignments, Phylogenetic trees

Number of proteins	1,200,609
Number of CDS	1,219,109
Number of families (at least 2 sequences)	18,499
Number of orphans	340,118 (28%)
Number of protein sequences associated to a family	860,491 (72%)

Phylogenetic trees for all 18, 499 Ensembl families (containing beteween 2 and 400 sequences) have been calculated. Phylogenetic trees are calculated with the program PHYML V3.0 (substitution model = LG, estimated proportion of invariable sites, 4 categories, estimated gamma, initial tree with BIONJ, best of "NNI" and "SPR" topology exploration, SH-like branch supports) on conserved blocks of the MUSCLE alignments selected with GBLOCKS.

Paralogy/Orthology Events Assignment Phylogenetic trees of each gene family are analysed using RapMasse to assign duplication or speciation event to each node by comparison with the species tree. For details on ortholog detection, see "Orthologs search".

HOMOLENS is now available. You can make requests on the protein and the genome data via our web server or via the socket server.

Server mirroring

You don't need to install the server itself to have HOMOLENS running on your computer as the client is enough for that purpose. On the other hand you may want to set-up your own server in a way to speed up your database access and to propose that service to potential users in your geographic area.Installation instructions can be found at http://pbil.univ-lyon1.fr/databases/acnuc/localinstall.html

The whole database is available from our FTP server at URL: ftp://pbil.univ-lyon1.fr/pub/homolens/ Note that it is much more efficient to use a dedicated FTP client to download the database rather than an Internet Web browser.

Sequence Annotations

Family annotation

Protein sequences: we add for each entry a line in the CC field that gives the number of the family the sequence belongs to:

CC   -!- GENE_FAMILY: HBG017522.

Genome sequence: we add for each coding sequence a qualifier that gives the number of the family the gene belongs to:

FT                   /gene_family="HBG017522"

This number is incorporated in the keywords associated to the corresponding entry in the ACNUC database structure. Due to that fact it is possible to retrieve all the sequences associated to a family with this number when using the retrieval system Query or the on-line version WWW-Query.

GC content and intron information annotations

We include in the the genomic sequneces the GC content of each coding sequence:

FT                   /%(C+G)="CG<35%"
FT                   /note="C+G content in third codon positions = 31.4 % "

It is thus possible to select sequences according to its GC content.

We also include in genmoic sequences descriptions of non-coding regions:

• INT_INT: internals introns (i.e. within CDS)
• 5'INT: introns in 5'UTR
• 3'INT: introns in 3'UTR
• 5'NCR: 5' non-coding region
• 3'NCR: 3' non-coding region

For example:

FT   3'ncr           2278..2368

These subsequences can be selected and extracted from the database in the same way as CDS, using WWW-Query (see Help).

Contact and reference

If you encounter some problems when installing or using HOMOLENS, please contact Laurent Duret or Simon Penel Also we welcome any comments or suggestions on the database and/or its interface.

Acknowledgements

Calculations have been done at the IN2P3 Computing Center.

Licence

HOMOLENS Database
Copyright 2005 CNRS
Authors: Laurent Duret,Manolo Gouy, Simon Penel, Guy Perriere

This database is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
A copy of the GNU General Public License is available at ftp://pbil.univ-lyon1.fr/pub/hogenom and http://www.gnu.org/licenses/.

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References

If you use families from HOMOLENS or HOGENOM, please cite :
Penel S, Arigon AM, Dufayard JF, Sertier AS, Daubin V, Duret L, Gouy M and Perrière G (2009)
"Databases of homologous gene families for comparative genomics" BMC Bioinformatics, 10 (Suppl 6):S3

If you use families from HOMOLENS, please cite as well the Ensembl database.