From gilbertd from net.bio.net  Thu Feb  3 15:23:27 2011
From: gilbertd from net.bio.net (Don Gilbert)
Date: Thu Feb  3 15:24:30 2011
Subject: [Arthropod] "new" Genome of Daphnia pulex published
Message-ID: <201102032023.p13KNRB28604@net.bio.net>



Here is another arthropod genome, finally in press after 
several years of wrestling with this data. -- Don

The Ecoresponsive Genome of Daphnia pulex
http://www.sciencemag.org/content/331/6017/555.abstract
Science 4 February 2011: Vol. 331 no. 6017 pp. 555-561
DOI: 10.1126/science.1197761

We describe the draft genome of the microcrustacean Daphnia
pulex, which is only 200 megabases and contains at least 30,907
genes. The high gene count is a consequence of an elevated rate
of gene duplication resulting in tandem gene clusters. More than
a third of Daphnia's genes have no detectable homologs in any
other available proteome, and the most amplified gene families
are specific to the Daphnia lineage. The coexpansion of gene
families interacting within metabolic pathways suggests that the
maintenance of duplicated genes is not random, and the analysis
of gene expression under different environmental conditions
reveals that numerous paralogs acquire divergent expression
patterns soon after duplication. Daphnia-specific genes,
including many additional loci within sequenced regions that are
otherwise devoid of annotations, are the most responsive genes to
ecological challenges.

See also genome companion papers at
http://www.biomedcentral.com/series/Daphnia

~
-- d.gilbert--bioinformatics--indiana-u--bloomington-in-47405
-- gilbertd@indiana.edu--http://marmot.bio.indiana.edu/