Authors:
Jeramiah J Smith, Shigehiro Kuraku, Carson Holt, Tatjana Sauka-Spengler, Ning Jiang, Michael S Campbell, Mark D Yandell, Tereza Manousaki, Axel Meyer, Ona E Bloom, Jennifer R Morgan, Joseph D Buxbaum, Ravi Sachidanandam, Carrie Sims, Alexander S Garruss, Malcolm Cook, Robb Krumlauf, Leanne M Wiedemann, Stacia A Sower, Wayne A Decatur, Jeffrey A Hall, Chris T Amemiya, Nil R Saha, Katherine M Buckley, Jonathan P Rast, Sabyasachi Das, Masayuki Hirano, Nathanael McCurley, Peng Guo, Nicolas Rohner, Clifford J Tabin, Paul Piccinelli, Greg Elgar, Magali Ruffier, Bronwen L Aken, Stephen M J Searle, Matthieu Muffato,Miguel Pignatelli, Javier Herrero, Matthew Jones,C Titus Brown,Yu-Wen Chung-Davidson, Kaben G Nanlohy, Scot V Libants, Chu-Yin Yeh, David W McCauley, James A Langeland, Zeev Pancer, Bernd Fritzsch, Pieter J de Jong, Baoli Zhu, Lucinda L Fulton, Brenda Theising, Paul Flicek, Marianne E Bronner, Wesley C Warren, Sandra W Clifton, Richard K Wilson, & Weiming Li
Summary:
Lampreys are representatives of an ancient vertebrate lineage that diverged from our own ~500 million years ago. By virtue of this deeply shared ancestry, the sea lamprey (P. marinus) genome is uniquely poised to provide insight into the ancestry of vertebrate genomes and the underlying principles of vertebrate biology. Here, we present the first lamprey whole-genome sequence and assembly. We note challenges faced owing to its high content of repetitive elements and GC bases, as well as the absence of broad-scale sequence information from closely related species. Analyses of the assembly indicate that two whole-genome duplications likely occurred before the divergence of ancestral lamprey and gnathostome lineages. Moreover, the results help define key evolutionary events within vertebrate lineages, including the origin of myelin-associated proteins and the development of appendages. The lamprey genome provides an important resource for reconstructing vertebrate origins and the evolutionary events that have shaped the genomes of extant organisms.
Source:
Nature Genetics; (02/24/13)