Abstract
The freshwater cnidarian Hydra was first described in 1702 and has been the object of study for 300 years. Experimental studies of Hydra between 1736 and 1744 culminated in the discovery of asexual reproduction of an animal by budding, the first description of regeneration in an animal, and successful transplantation of tissue between animals. Today, Hydra is an important model for studies of axial patterning, stem cell biology and regeneration. Here we report the genome of Hydra magnipapillata and compare it to the genomes of the anthozoan Nematostella vectensis and other animals. The Hydra genome has been shaped by bursts of transposable element expansion, horizontal gene transfer, trans-splicing, and simplification of gene structure and gene content that parallel simplification of the Hydra life cycle. We also report the sequence of the genome of a novel bacterium stably associated with H. magnipapillata. Comparisons of the Hydra genome to the genomes of other animals shed light on the evolution of epithelia, contractile tissues, developmentally regulated transcription factors, the Spemann-Mangold organizer, pluripotency genes and the neuromuscular junction.
Original language | English (US) |
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Pages (from-to) | 592-596 |
Number of pages | 5 |
Journal | NATURE |
Volume | 464 |
Issue number | 7288 |
DOIs | |
State | Published - Mar 25 2010 |
Externally published | Yes |
Bibliographical note
Funding Information:Acknowledgements We are grateful to S. Clifton, R. Wilson and the EST sequencing group at the Genome Sequencing Center at the Washington University School of Medicine for their efforts in generating the Hydra ESTs and to the National Science Foundation for its support of the Hydra EST project (grant number IBN-0120591). Funding for the sequencing of the Hydra genome was provided by the National Human Genome Research Institute. We thank J. Gerhart who, as co-chair of the National Human Genome Research Institute Working Group on Comparative Genome Evolution, advocated sequencing of the Hydra genome. The septate junction electron micrograph in Fig. 3 was provided by G. Rieger. K.J.P. thanks N. Margulis for technical assistance and the NSF for support (grant number DEB-0716960). U.T. was supported by the Austrian Science Fund and the Norwegian Research Council. B.H. was supported by Austrian Science Fund grants FWF P16685 and FWF P20734. D.S.R. was supported by R. Melmon and the Gordon and Betty Moore Foundation. Work at the US Department of Energy Joint Genome Institute was supported by the Office of Science of the US Department of Energy under Contract No. DE-AC02-05CH11231. T.F. and T.G. were supported by Grants-In-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. T.C.G.B. was supported by grants from the Deutsche Forschungsgemeinschaft (DFG SFB617-A1) and from the DFG Cluster of Excellence programs ‘The Future Ocean’ and ‘Inflammation at Interfaces’. T.W.H. was supported by grants from the Deutsche Forschungsgemeinschaft including SFB488-A12 and the DFG Cluster of Excellence program ‘CellNetworks’. Support for H.W. was provided by the TOYOBO Biotechnology Foundation and the Alexander von Humboldt Foundation. Support for A.B., B.B., C.G., C.N.D., H.W., P.G.B., S.O., T.F. (Mercator Professor) and Y.N. was provided by the Deutsche Forschungsgemeinschaft.
ASJC Scopus subject areas
- General