ANALYSIS OF ALEXANDRIUM TAMARENSE (DINOPHYCEAE) GENES REVEALS THE COMPLEX EVOLUTIONARY HISTORY OF A MICROBIAL EUKARYOTE().

ABSTRACT: Microbial eukaryotes may extinguish much of their nuclear phylogenetic history due to endosymbiotic/horizontal gene transfer (E/HGT). We studied E/HGT in 32,110 contigs of expressed sequence tags (ESTs) from the dinoflagellate Alexandrium tamarense (Dinophyceae) using a conservative phylogenomic approach. The vast majority of predicted proteins (86.4%) in this alga are novel or dinoflagellate-specific. We searched for putative homologs of these predicted proteins against a taxonomically broadly sampled protein database that includes all currently available data from algae and protists and reconstructed a phylogeny from each of the putative homologous protein sets. Of the 2,523 resulting phylogenies, 14-17% are potentially impacted by E/HGT involving both prokaryote and eukaryote lineages,

SUBMITTER: Chan CX 

PROVIDER: S-EPMC3466611 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature