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Nucleic Acids Research 2005 33(Database Issue):D344-D347; doi:10.1093/nar/gki121
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Nucleic Acids Research, 2005, Vol. 33, Database issue D344-D347
© 2005, the authors
Nucleic Acids Research, Vol. 33, Database issue © Oxford University Press 2005; all rights reserved

The Diatom EST Database

Uma Maheswari1, Anton Montsant2,3, Johannes Goll1,4, S. Krishnasamy5, K. R. Rajyashri1, Villoo Morawala Patell1 and Chris Bowler2,3,*

1 Avestha Gengraine Technologies Pvt. Ltd, ‘Discoverer’, 9th Floor, International Technology Park, Whitefield Road, Bangalore 560066, India, 2 Laboratory of Molecular Plant Biology, Stazione Zoologica ‘Anton Dohrn’, Villa Comunale, I-80121 Naples, Italy, 3 Organismes Photosynthétiques et Environnement, ENS/CNRS FRE 2433, Ecole Normale Supérieure, 46 rue d'Ulm, 75230 Paris, France, 4 Weihenstephan University of Applied Sciences, Am Hofgarten 4, 85354 Freising, Germany, 5 Bioinformatics Center, School of Biotechnology, Madurai Kamaraj University, Palkalai Nagar, Madurai 625021, India

* To whom correspondence should be addressed. Tel: +33 144323525; Fax: +33 144323935; Email: cbowler{at}biologie.ens.fr

Received August 16, 2004; Revised and Accepted October 21, 2004

The Diatom EST database provides integrated access to expressed sequence tag (EST) data from two eukaryotic microalgae of the class Bacillariophyceae, Phaeodactylum tricornutum and Thalassiosira pseudonana. The database currently contains sequences of close to 30 000 ESTs organized into PtDB, the P.tricornutum EST database, and TpDB, the T.pseudonana EST database. The EST sequences were clustered and assembled into a non-redundant set for each organism, and these non-redundant sequences were then subjected to automated annotation using similarity searches against protein and domain databases. EST sequences, clusters of contiguous sequences, their annotation and analysis with reference to the publicly available databases, and a codon usage table derived from a subset of sequences from PtDB and TpDB can all be accessed in the Diatom EST Database. The underlying RDBMS enables queries over the raw and annotated EST data and retrieval of information through a user-friendly web interface, with options to perform keyword and BLAST searches. The EST data can also be retrieved based on Pfam domains, Cluster of Orthologous Groups (COG) and Gene Ontologies (GO) assigned to them by similarity searches. The Database is available at http://avesthagen.sznbowler.com.

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