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Integrative and Comparative Biology Advance Access originally published online on May 17, 2006
Integrative and Comparative Biology 2006 46(6):931-939; doi:10.1093/icb/icl006
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© The Author 2006. Published by Oxford University Press on behalf of the Society for Integrative and Comparative Biology. All rights reserved. For permissions please email: journals.permissions@oxfordjournals.org.

Analysis of multiple tissue-specific cDNA libraries from the Pacific whiteleg shrimp, Litopenaeus vannamei

Nuala A. O'Leary*, Harold F. Trent, III{dagger}, Javier Robalino{dagger}, Megan E. T. Peck{dagger}, David J. McKillen{dagger} and Paul S. Gross1,*,{dagger}
* Medical University of South Carolina, Department of Biochemistry and Molecular Biology Charleston, SC 29425, USA
{dagger} Marine Biomedicine and Environmental Sciences Center, Medical University of South Carolina Charleston SC 29412, USA

Correspondence: 1E-mail: grossp{at}musc.edu

Multiple small-scale transcriptome studies have been undertaken for various members of the Penaeidae. Penaeid shrimp are important both as members of diverse ecosystems around the world and for their importance as commercial commodities. Of the many shrimps, the most important from this family is the Pacific whiteleg shrimp, Litopenaeus vannamei, as it is the primary shrimp used in worldwide aquaculture. The sequencing and analysis of 13 656 expressed sequence tags (ESTs) from this species is presented. ESTs were derived from multiple tissue-specific cDNA libraries with an emphasis being placed on those tissues with predicted immune function. Assembly of the sequences into non-overlapping clusters yielded 7466 putative unigenes (1981 contigs and 5485 singletons). Multiple approaches were taken to assign putative function to each transcript; sequence homology searches using BLASTX (Basic Local Alignment Search Tool: Translated query versus protein database) of the National Center for Biotechnology Information's (NCBI) GenBank Database and Gene Ontology annotation, and still a significant portion of the shrimp ESTs (62%) had no homology with known proteins in the public databases. The sequence and complete annotation of all ESTs is available at www.marinegenomics.org, a publicly accessible database. In addition to providing the basic resources for microarray construction, transcript profiling, and novel gene discovery, this study constitutes the largest combined analysis of ESTs from any shrimp species and is a prelude to an even larger effort aimed at identifying and depleting highly redundant genes from shrimp cDNA libraries toward the goal of sequencing 100 000 shrimp ESTs.


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