Jellyfish Genomes Reveal Distinct Homeobox Gene Clusters and Conservation of Small RNA Processing
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AbstractThe phylum Cnidaria represents a close outgroup to Bilateria and includes familiar animals including sea anemones, corals, hydroids, and jellyfish. Here we report genome sequencing and assembly for true jellyfish Sanderia malayensis and Rhopilema esculentum. The homeobox gene clusters are characterised by interdigitation of Hox, NK, and Hox-like genes revealing an alternate pathway of ANTP class gene dispersal and an intact three gene ParaHox cluster. The mitochondrial genomes are linear but, unlike in Hydra, we do not detect nuclear copies, suggesting that linear plastid genomes are not necessarily prone to integration. Genes for sesquiterpenoid hormone production, typical for arthropods, are also now found in cnidarians. Somatic and germline cells both express piwi-interacting RNAs in jellyfish revealing a conserved cnidarian feature, and evidence for tissue-specific microRNA arm switching as found in Bilateria is detected. Jellyfish genomes reveal a mosaic of conserved and divergent genomic characters evolved from a shared ancestral genetic architecture. Jellyfish plays an important ecological role in surface waters and the deep sea. Here the authors report genome sequences of two true jellyfish, Sanderia malayensis and Rhopilema esculentum, showing distinct homeobox gene clusters and sesquiterpenoid pathway.
All Author(s) ListWenyan Nong, Jianquan Cao, Yiqian Li, Zhe Qu, Jin Sun, Thomas Swale, Ho Yin Yip, Pei Yuan Qian, Jian-Wen Qiu, Hoi Shan Kwan, William Bendena, Stephen Tobe, Ting Fung Chan, Kevin Y. Yip, Ka Hou Chu, Sai Ming Ngai, Karl YK Tsim, Peter W.H. Holland, Jerome H.L. Hui
Journal nameNature Communications
Year2020
Month6
Volume Number11
PublisherNature Research
Article number3051
ISSN2041-1723
LanguagesEnglish-United States

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