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It is at the heart of a multibillion-dollar industry and to meet demand for this product, aquaculture methods and facilities have been established. However, there are challenges associated with optimization of reproduction, feeding and growth in non-natural environments. Therefore, we need to learn more about the biology of <jats:italic>A<\/jats:italic>. <jats:italic>japonicus<\/jats:italic>, including processes such as aestivation, evisceration, regeneration and albinism. One of the major classes of molecules that regulate physiology and behaviour in animals are neuropeptides, and a few bioactive peptides have already been identified in <jats:italic>A<\/jats:italic>. <jats:italic>japonicus<\/jats:italic>. To facilitate more comprehensive investigations of neuropeptide function in <jats:italic>A<\/jats:italic>. <jats:italic>japonicus<\/jats:italic>, here we have analysed genomic and transcriptomic sequence data and proteomic data to identify neuropeptide precursors and neuropeptides in this species. We identified 44 transcripts encoding neuropeptide precursors or putative neuropeptide precursors, and in some instances neuropeptides derived from these precursors were confirmed by mass spectrometry. Furthermore, analysis of genomic sequence data enabled identification of the location of neuropeptide precursor genes on genomic scaffolds and linkage groups (chromosomes) and determination of gene structure. Many of the precursors identified contain homologs of neuropeptides that have been identified in other bilaterian animals. Precursors of neuropeptides that have thus far only been identified in echinoderms were identified, including L- and F-type SALMFamides, AN peptides and others. Precursors of several peptides that act as modulators of neuromuscular activity in <jats:italic>A<\/jats:italic>. <jats:italic>japonicus<\/jats:italic> were also identified. The discovery of a large repertoire of neuropeptide precursors and neuropeptides provides a basis for experimental studies that investigate the physiological roles of neuropeptide signaling systems in <jats:italic>A<\/jats:italic>. <jats:italic>japonicus<\/jats:italic>. Looking ahead, some of these neuropeptides may have effects that could be harnessed to enable improvements in the aquaculture of this economically important species.<\/jats:p>","DOI":"10.1038\/s41598-019-45271-3","type":"journal-article","created":{"date-parts":[[2019,6,20]],"date-time":"2019-06-20T10:02:54Z","timestamp":1561024974000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":49,"title":["Neuropeptide precursors and neuropeptides in the sea cucumber Apostichopus japonicus: a genomic, transcriptomic and proteomic analysis"],"prefix":"10.1038","volume":"9","author":[{"given":"Muyan","family":"Chen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alzbeta","family":"Talarovicova","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yingqiu","family":"Zheng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenneth B.","family":"Storey","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9169-0048","authenticated-orcid":false,"given":"Maurice R.","family":"Elphick","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,6,20]]},"reference":[{"key":"45271_CR1","doi-asserted-by":"publisher","first-page":"e11346","DOI":"10.1371\/journal.pone.0011346","volume":"5","author":"MK Schwerdtner","year":"2010","unstructured":"Schwerdtner, M. 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