Hyde, CJ and Fitzgibbon, QP and Elizur, A and Smith, GG and Vertura, T, Transcriptional profiling of spiny lobster metamorphosis reveals three new additions to the nuclear receptor superfamily, BMC Genomics, 20 Article 531. ISSN 1471-2164 (2019) [Refereed Article]
© The Author(s) 2019. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/
The Crustacea are an evolutionarily diverse taxon which underpins marine food webs and contributes significantly to the global economy. However, our knowledge of crustacean endocrinology and development is far behind that of terrestrial arthropods. Here we present a unique insight into the molecular pathways coordinating crustacean metamorphosis, by reconciling nuclear receptor (NR) gene activity from a 12-stage, 3-replicate transcriptome in the ornate spiny lobster (Panulirus ornatus) during larval development.
We annotated 18 distinct nuclear receptor genes, including three novel NRs which are upregulated prior to metamorphosis and have hence been named the "molt-associated receptors" (MARs). We also demonstrate the ecdysone-responsive expression of several known molt-related NRs including ecdysone receptor, fushi-tarazu-F1 and E75. Phylogenetic analysis of the curated NR family confirmed gene annotations and suggested that the MARs are a recent addition to the crustacean superfamily, occurring across the Malacostraca from the Stomatopoda to the Decapoda. The ligand-binding domain of these receptors appears to be less conserved than that of typical group-1 NRs. Expression data from two other crustacean species was utilized to examine MAR expression. The Y-organ of the tropical land crab showed a decline in expression of all MARs from intermolt to post-molt. Tissue distributions showed gonad-enriched expression in the Eastern rock lobster and antennal gland-enriched expression in the tropical land crab, although expression was evident across most tissues.
By mining transcriptome data, we have curated an extensive list of NR genes expressed during the metamorphic molts of P. ornatus, including three novel crustacean NRs which appear to play a role in the molting process. Divergence of the E-region of these new receptors indicates that they may have adopted a function that is unconventional for NRs. Based on expression patterns, we can confirm that a number of NRs play a role in the ecdysone cassette which regulates molting in crustaceans. This study describes in detail the molecular events surrounding crustacean molting and metamorphosis by taking advantage of the distinctive life history unique to achelatan crustaceans.
|Item Type:||Refereed Article|
|Keywords:||transcriptome, spiny lobster, metamorphosis, Panulirus ornatus|
|Research Division:||Agricultural, Veterinary and Food Sciences|
|Research Group:||Fisheries sciences|
|Objective Division:||Animal Production and Animal Primary Products|
|Objective Group:||Fisheries - aquaculture|
|Objective Field:||Aquaculture rock lobster|
|UTAS Author:||Fitzgibbon, QP (Associate Professor Quinn Fitzgibbon)|
|UTAS Author:||Smith, GG (Professor Gregory Smith)|
|Funding Support:||Australian Research Council (IH120100032)|
|Web of Science® Times Cited:||6|
|Deposited By:||Fisheries and Aquaculture|
|Downloads:||7 View Download Statistics|
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