[Coral-List] zooxanthella genome
douglasfennertassi at gmail.com
Thu Nov 5 22:10:20 EST 2015
The *Symbiodinium kawaguii *genome illuminates dinoflagellate gene
expression and coral symbiosis.
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
kawagutii*. We annotated protein-coding genes and identified
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.
Science 350: 691-694. Nov 6, 2015.
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