Vertebrate-Type Intron-Rich Genes in the Marine Annelid Platynereis dumerilii

Author:

Raible Florian12345,Tessmar-Raible Kristin12345,Osoegawa Kazutoyo12345,Wincker Patrick12345,Jubin Claire12345,Balavoine Guillaume12345,Ferrier David12345,Benes Vladimir12345,de Jong Pieter12345,Weissenbach Jean12345,Bork Peer12345,Arendt Detlev12345

Affiliation:

1. Developmental Unit, European Molecular Biological Laboratory (EMBL), Meyerhofstraße 1, D-69117 Heidelberg, Germany.

2. Computational Unit, European Molecular Biological Laboratory (EMBL), Meyerhofstraße 1, D-69117 Heidelberg, Germany.

3. Genomics Core Facility, European Molecular Biological Laboratory (EMBL), Meyerhofstraße 1, D-69117 Heidelberg, Germany.

4. Children's Hospital, Oakland Research Institute, 747 52nd Street, Oakland, CA 94609, USA.

5. Génoscope, Centre National de Séquençage and CNRS UMR 8030, 2 Rue Gaston Crémieux, CP 5706 91057 Evry Cedex, France.

Abstract

Previous genome comparisons have suggested that one important trend in vertebrate evolution has been a sharp rise in intron abundance. By using genomic data and expressed sequence tags from the marine annelid Platynereis dumerilii , we provide direct evidence that about two-thirds of human introns predate the bilaterian radiation but were lost from insect and nematode genomes to a large extent. A comparison of coding exon sequences confirms the ancestral nature of Platynereis and human genes. Thus, the urbilaterian ancestor had complex, intron-rich genes that have been retained in Platynereis and human.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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