PreprintCited by 512Developmental Biology and Gene RegulationChromosomal and Genetic VariationsGenomics and Phylogenetic Studies

The amphioxus genome illuminates vertebrate origins and cephalochordate biology

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Holland, Linda Z., Albalat, Ricard, Azumi, Kaoru, Benito-Gutiérrez, Èlia, Blow, Matthew J., Bronner-Fraser, Marianne, Brunet, Frederic, Butts, Thomas +56 more·2008·Genome Research

Abstract

Cephalochordates, urochordates, and vertebrates evolved from a common ancestor over 520 million years ago. To improve our understanding of chordate evolution and the origin of vertebrates, we intensively searched for particular genes, gene families, and conserved noncoding elements in the sequenced genome of the cephalochordate Branchiostoma floridae, commonly called amphioxus or lancelets. Special attention was given to homeobox genes, opsin genes, genes involved in neural crest development, nuclear receptor genes, genes encoding components of the endocrine and immune systems, and conserved cis-regulatory enhancers. The amphioxus genome contains a basic set of chordate genes involved in development and cell signaling, including a fifteenth Hox gene. This set includes many genes that were co-opted in vertebrates for new roles in neural crest development and adaptive immunity. However, where amphioxus has a single gene, vertebrates often have two, three, or four paralogs derived from two whole-genome duplication events. In addition, several transcriptional enhancers are conserved between amphioxus and vertebrates—a very wide phylogenetic distance. In contrast, urochordate genomes have lost many genes, including a diversity of homeobox families and genes involved in steroid hormone function. The amphioxus genome also exhibits derived features, including duplications of opsins and genes proposed to function in innate immunity and endocrine systems. Our results indicate that the amphioxus genome is elemental to an understanding of the biology and evolution of nonchordate deuterostomes, invertebrate chordates, and vertebrates.

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  • Similar expression patterns were observed in transgenic zebrafish bearing constructs for the orthologous human and pufferfish CNRs.

    “Similar expression patterns were observed in transgenic zebra fi sh bearing constructs for the orthologous human and puffer fi sh CNRs (25, 26).”

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  1. Cedex 07, France; 7 Department of Zoology, University of Oxford, South Parks Road, Oxford, OX1 3PS, UK; 8 Dipartimento di Bio- logia, Università di Genova, viale Benedetto XV 5, 16132
  2. Gaskell, W.H., MacBride, E.W., Starling, E.H., Goodrich, E.S., Gadow, H., Smith Woodward, A., Dendy, A., Lankester, E.R., Chalmers Mitchell, P., Gardiner, J.S., et al. 1910. Discussion on the origin of vertebrates. Proc. Linn. Soc. London 122: 9-50.
  3. Holland, P.W.H., Patton, S.J., Brooke, N.M., and Garcia-Fernàndez, J. 1997. Advances in comparative endocrinology: XIII International Congress of Comparative Endocrinology (eds. S. Kawashima and S. Kikuyama) pp. 247-252. Monduzzi, Bologna, Italy.

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Authors
Holland, L. Z., Albalat, R., Azumi, K., Benito-Gutiérrez, È., Blow, M. J., Bronner-Fraser, M., Brunet, F., Butts, T., Candiani, S., Dishaw, L. J., Ferrier, D. E. K., Garcia-Fernàndez, J., Gibson-Brown, J. J., Gissi, C., Godzik, A., Hallböök, F., Hirose, D., Hosomichi, K., Ikuta, T., Inoko, H., Kasahara, M., Kasamatsu, J., Kawashima, T., Kimura, A., Kobayashi, M., Kozmik, Z., Kubokawa, K., Laudet, V., Litman, G. W., McHardy, A. C., Meulemans, D., Nonaka, M., Olinski, R. P., Pancer, Z., Pennacchio, L. A., Pestarino, M., Rast, J. P., Rigoutsos, I., Robinson-Rechavi, M., Roch, G., Saiga, H., Sasakura, Y., Satake, M., Satou, Y., Schubert, M., Sherwood, N., Shiina, T., Takatori, N., Tello, J., Vopalensky, P., Wada, S., Xu, A., Ye, Y., Yoshida, K., Yoshizaki, F., Yu, J.-K., Zhang, Q., Zmasek, C. M., de Jong, P. J., Osoegawa, K., Putnam, N. H., Rokhsar, D. S., Satoh, N., & Holland, P. W. H.
Affiliations
  • Scripps Institution of Oceanography (US)
  • Universitat de Barcelona (ES)
  • Hokkaido University (JP)
  • Joint Genome Institute (US)
  • California Institute of Technology (US)
  • University of Oxford (GB)
  • University of Genoa (IT)
  • Moffitt Cancer Center (US)
  • University of St Andrews (GB)
  • University of Milan (IT)
  • Sanford Burnham Prebys Medical Discovery Institute (US)
  • Uppsala University (SE)
  • Tokyo Metropolitan University (JP)
  • Tokai University (JP)
  • University of California, Berkeley (US)
  • The University of Tokyo (JP)
  • Lyon 1 Université (FR)
  • IBM Research - Thomas J. Watson Research Center (US)
  • University of Maryland, Baltimore (US)
  • University of Toronto (CA)
  • University of Victoria (CA)
  • University of Tsukuba (JP)
  • Tohoku University (JP)
  • Kyoto University (JP)
  • Nagahama Institute of Bio-Science and Technology (JP)
  • Sun Yat-sen University (CN)
  • Juntendo University (JP)
Venue
Genome Research
Published
2008-06-18
Volume
18
Issue
7
Pages
1100-1111
ISSN
1088-9051 (ISSN-L)
OpenAlex
W2135740919
Cited by
512
References
86
Citations by year
2026: 4 · 2025: 14 · 2024: 10 · 2023: 8 · 2022: 14 · 2021: 12 · 2020: 23 · 2019: 13 · 2018: 23 · 2017: 21 · 2016: 23 · 2015: 32 · 2014: 41 · 2013: 42 · 2012: 55
Type
posted content
Language
en
Open access
Locations
  • Genome Research (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano) (submittedVersion, other-oa)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion, cc-by-nc)
  • Digital Commons@Becker (Washington University School of Medicine) (submittedVersion)
  • HAL (submittedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion)
  • IRIS (submittedVersion)
  • CINECA IRIS Institutional Research Information System (University of Bari Aldo Moro) (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
  • Sunderland Repository (University of Sunderland) (submittedVersion)
Funders
  • National Science Foundation
  • Wellcome Trust
  • European Commission
  • Ministry of Education, Culture, Sports, Science and Technology
  • Ministero dell’Istruzione, dell’Università e della Ricerca (FIRB_2001)
  • Centre National de la Recherche Scientifique
  • National Institutes of Health
  • Biotechnology and Biological Sciences Research Council (BBS/B/12067/2, BBS/B/12067)
  • Japan Society for the Promotion of Science
  • National Institute of Allergy and Infectious Diseases (R01AI023338)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
amphioxus, Branchiostoma floridae, cephalochordates, vertebrate origin, chordate evolution, Hox genes, homeobox genes, opsin genes, neural crest development, nuclear receptors, cis-regulatory enhancers, whole-genome duplication, paralogs, adaptive immunity, innate immunity, endocrine system, tunicates, gene loss
MeSH terms
Animals, Chordata, Nonvertebrate, Genes, Homeobox, Humans, Mice, Transgenic, Phylogeny, Vertebrates, Genome, Evolution, Molecular, Mice

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