Article open access publication

The Symbiodinium kawagutii genome illuminates dinoflagellate gene expression and coral symbiosis

Science, American Association for the Advancement of Science (AAAS), ISSN 0036-8075

Volume 350, 6261, 2015

DOI:10.1126/science.aad0408, Dimensions: pub.1034689674, PMID: 26542574,

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  1. (1) Xiamen University, grid.12955.3a
  2. (2) University of Connecticut, grid.63054.34
  3. (3) University of Hong Kong, grid.194645.b
  4. (4) Beijing Genomics Institute, grid.21155.32
  5. (5) Bioinformatics Institute, grid.418325.9
  6. (6) University of Copenhagen, grid.5254.6, KU
  7. (7) King Abdulaziz University, grid.412125.1
  8. (8) James D. Watson Institute of Genome Science, Hangzhou, China
  9. (9) University of California, Los Angeles, grid.19006.3e
  10. (10) University of Montreal, grid.14848.31

Description

Dinoflagellates are important components of marine ecosystems and essential coral symbionts, yet little is known about their genomes. We report here on the analysis of a high-quality assembly from the 1180-megabase genome of Symbiodinium kawagutii. We annotated protein-coding genes and identified Symbiodinium-specific gene families. No whole-genome duplication was observed, but instead we found active (retro)transposition and gene family expansion, especially in processes important for successful symbiosis with corals. We also documented genes potentially governing sexual reproduction and cyst formation, novel promoter elements, and a microRNA system potentially regulating gene expression in both symbiont and coral. We found biochemical complementarity between genomes of S. kawagutii and the anthozoan Acropora, indicative of host-symbiont coevolution, providing a resource for studying the molecular basis and evolution of coral symbiosis.

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University of Copenhagen

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Times Cited: 225

Field Citation Ratio (FCR): 30.3

Relative Citation ratio (RCR): 8.97

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