In addition, the coral innate immunity repertoire is notably more complex than that of the sea anemone, indicating that some of these genes may have roles in symbiosis or coloniality. 2018, 2019; Helmkampf et al. The gene models were created by running AUGUSTUS on a repeat-masked genome produced by RepeatMasker39, and improved by PASA38. The number of chromosomes was determined by their preparation from nuclei of embryonic cells. 4), and contains 23,668 predicted protein-coding loci (Supplementary Table 6). Sperm from a single colony served as the source of DNA for sequencing using a combination of Roche 454 GS-FLX10 and Illumina Genome Analyser IIx (GAIIx)11 methods. Functional annotation was performed by homology searching to match predicted proteins to the PFAM-A protein domain and the Kyoto Encyclopedia of Genes and Genomes (Kanehisa et al. Using the Acropora digitifera genome to understand coral responses to environmental change. However, comparative analyses indicated that, in the case of Acropora, the coral host might be metabolically dependent on the symbiont. KEGG for linking genomes to life and the environment. Whereas we were able to identify genes encoding the latter in both A. digitifera and Nematostella, the former could not be identified in Acropora despite a clear match being present in Nematostella (Supplementary Fig. We examined how many genes encoding fluorescent proteins are present in the recently sequenced genome of the coral Acropora digitifera. Nature 464, 592–596 (2010), Hemmrich, G. & Bosch, T. C. Compagen, a comparative genomics platform for early branching metazoan animals, reveals early origins of genes regulating stem cell differentiation. and D.J.M. 2012; Denton et al. a, The colony the genome of which was sequenced in the present study. Selection of conserved blocks from multiple alignments for their use in phylogenetic analysis. Transcriptome libraries for 454 GS-FLX were prepared36 and sequenced as per manufacturer’s instructions. This colony is maintained in aquarium culture at the Sesoko Station, University of the Ryukyus, and is thus available for further investigation of the genome. Improving the Arabidopsis genome annotation using maximal transcript alignment assemblies. S4, Supplementary Material online), resulting in the presence of extensive nonorthologous but aligned regions in the protein alignments. 2016; supplementary table S6 and fig. 2001) that have diverged since the Oligocene (Santodomingo et al. Trends Genet. 4, 122–131 (2001), Article Here we report the whole-genome sequence of a second Acropora species, A. millepora, which has been the most extensively studied Acropora species at the molecular level (reviewed in Miller et al. Science 316, 1893–1895 (2007), Sarashina, I. Moreover, whereas a polymerase chain reaction (PCR) strategy confirmed the presence of Cbs in some other corals, Galaxea fascicularis, Favites chinenis, Favia lizardensis and Ctenactis echinata, no amplification products could be obtained for two different Acropora species (Table 1 and Supplementary Fig. Lond. 2018) are most advanced in their development in this species. For these purposes, amino acid sequences were aligned using ClustalW42 or ClustalX42 under the default options. Galaxins, first purified from the coral Galaxea fascicularis, are unique to corals and are the only coral skeletal matrix protein for which the complete primary structure has been determined26. The vivid coloration of corals depends on fluorescent proteins that include cyan (CFP), green (GFP) and red (RFP) fluorescent proteins, and a non-fluorescent blue/purple chromoprotein. The 454 shotgun and paired-end reads were assembled de novo by GS De novo Assembler version 2.3 (Newbler, Roche)10, and subsequent scaffolding was performed by SOPRA27 and SSPACE28 using the Illumina mate-pair information. 32). Whole-genome duplication (WGD) has been recognized as a significant evolutionary force in the origin and diversification of multiple organisms. 2014, supplementary fig. Dev. Comparison of assembly and annotation statistics for the Acropora millepora and Acropora digitifera genomes. 23b). Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. We thank all labs that produced the data on our website, and graciously allowed us to share it with the public! 211, 3059–3066 (2008), CAS (a) An example of a PAP region lacking coverage. This problem should be thoroughly addressed before assessing gene evolutionary history in future work. (a) An Acropora millepora colony and (b) a close up view of an A. millepora colony. Marine Genomics Unit, Okinawa Institute of Science and Technology Promotion Corporation, Onna, Okinawa 904-0412, Japan, Chuya Shinzato, Eiichi Shoguchi, Takeshi Kawashima, Mayuko Hamada, Kanako Hisata, Makiko Tanaka, Mayuki Fujiwara, Ryo Koyanagi, Tetsuro Ikuta & Nori Satoh, DNA Sequencing Center Section, Okinawa Institute of Science and Technology Promotion Corporation, Onna, Okinawa 904-0412, Japan, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan, ARC Centre of Excellence for Coral Reef Studies and School of Pharmacy and Molecular Sciences, James Cook University, Townsville, 4811, Queensland, Australia, You can also search for this author in The mitochondrial genome sequence was identified from the assembly and compared with known Acropora mitochondrial genomes. 25), including two likely A. digitifera homologues of Gfa-galaxin. 36, D480–D484 (2008), Shick, J. M. & Dunlap, W. C. Mycosporine-like amino acids and related Gadusols: biosynthesis, acumulation, and UV-protective functions in aquatic organisms. d–h, Eggs, embryos, larva and primary polyp of A. digitifera, from which messenger RNA was extracted for transcriptome analyses. This genome contains approximately 23,700 gene models. Nature 442, 39–44 (2006), Huang, S. et al. The read coverage (0 to 50) across the scaffold is shown in gray for a control and three samples. For each reference scaffold, the top three scaffolds containing the most alignments in the other genome are shown. 2012) to remove duplicated haplotypes and do scaffolding. (a) An example of a PAP region lacking coverage. Sox genes in the coral Acropora millepora: divergent expression patterns reflect differences in developmental mechanisms within the Anthozoa. PAP in the Acropora digitifera genome. The greater complexity of the coral innate immunity network may in part reflect adaptations associated with the symbiotic state and coloniality. 2008) and CRISPR/Cas9 (Cleves et al. Information about genome files, completeness, GC-content, size, N50-values, and sequencing methods are listed. (PDF 16049 kb). Reef-building corals typically inhabit shallow and relatively clear tropical waters and are therefore constantly exposed to high levels of ultraviolet irradiation. Bioinformatics 24, 637–644 (2008), Finn, R. D. et al. 2017; Cunning et al. Biol. 31, 5654–5666 (2003), Smit, A. F. A., Hubley, R. & Green, P. RepeatMasker Open-3.0. Scale bar, Molecular phylogenetic analyses of the genes are shown in Figs. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate. 6a), and of these, 11% have clear homology only among expressed sequence tag (EST) data from corals13 (Supplementary Fig. The dynamic genome of Hydra . This work was supported by the Australian Research Council through the Centre of Excellence for Coral Reef Studies, the Centre for Molecular Genetics of Development and Discovery Grants DP0209460, DP0344483, and DP1095343. Article 2012) have been available for A. millepora for some time, a genome assembly has not, a situation that is redressed with this publication. Using the Acropora digitifera genome to understand coral responses to environmental change. (Acropora millepora and Acropora digitifera). The diploidy of the genome was examined by fluorescent in situ hybridization (FISH) of BAC clones31, which were constructed in pKS146 (ref. Macey, M. G. ) (Humana, 2007), Li, R. et al. The coral's innate immunity repertoire is more complex than that of the solitary sea anemone, suggesting that some of these genes are involved in symbiosis or coloniality. Of the other Acropora species for which whole mitochondrial sequences are available, A.tenuis is the most divergent (99.32% identity with the A. digitifera reference); this species is always well resolved in molecular phylogenies (see, e.g., van Oppen et al. The genome of the reef-building coral Acropora digitifera has been analysed with a view to understanding the molecular basis of symbiosis and responses to environmental change. Molecular phylogenetics indicate that the coral and the sea anemone Nematostella vectensis diverged approximately 500 million years ago, considerably earlier than the time over which modern corals are represented in the fossil record (∼240 million years ago)5. De novo identification of repetitive elements was conducted on the A. millepora genome assembly. Genome-wide, the most extreme values (π > 5.0%, measured in 1-kb windows) fell over a region containing a single gene, which is orthologous to sacsin in Acropora digitifera. 2011) and a comprehensive transcriptome assembly (Moya et al. 17, 540–552 (2000), Gouy, M., Guindon, S. & Gascuel, O. SeaView version 4: a multiplatform graphical user interface for sequence alignment and phylogenetic tree building. (2011). 1b). For example, whereas a single canonical Toll/TLR protein is present in N. vectensis18, the Acropora genome encodes at least four such molecules, as well as five IL-1R-related proteins and a number of TIR-only proteins (Fig. Nature 437, 376–380 (2005), Bentley, D. R. Whole-genome re-sequencing. If and when a whole-genome sequence becomes available for the dinoflagellate symbiont of corals Symbiodinium sp. (2011) Assembled Transcriptome v1.0 (July 2011) adi_transcriptome_assembly.v1.fa.gz: Assembled Transcriptome v1.0, (compressed with gzip), total 36,780 contigs for 29,364,984 bp : One-third of reef-building corals face elevated extinction risk from climate change and local impacts. 2011). See supplementary table S11, Supplementary Material online, for more detail. Detailed description of genome annotation is provided in Supplementary Materials online. and D.J.M. Mol. All Resources; Chemicals & Bioassays. PAP in the Acropora digitifera genome. Paper. 1 a,b) was sequenced and assembled using a whole-genome shotgun sequencing approach based 140.6 million (PE, MP, and fosmid) paired-end reads (supplementary table S1, Supplementary Material online). The schematic representation of the domain structures of TIR-domain-containing proteins identified in A. digitifera, alongside the corresponding complements from Nematostella vectensis and Hydra magnipapillata. 10, 311–336 (2006), Fukuda, I. et al. 20, 116–122 (2004), Jackson, D. J., Macis, L., Reitner, J., Degnan, B. M. & Wörheide, G. Sponge paleogenomics reveals an ancient role for carbonic anhydrase in skeletogenesis. Nature 463, 311–317 (2010), Wurm, Y. et al. The obligate endosymbiosis of corals dates at least from the mid-Triassic, and the longevity of this association might therefore be expected to have resulted in changes within the coral genome. Acropora species is the dominant reef‐building coral of the Indo‐Pacific 7, and Acropora digitifera (Staghorn coral) is the dominant coral on Okinawan reefs. (2020), Frontiers in Marine Science The genome is highly heterozygous with the estimated SNP rate of ∼2.0% by GenomeScope (supplementary table S4 and fig. 2018) with the default parameters. Article 2011) by virtue of its wide distribution (Carpenter et al. Although large RNAseq data sets (Meyer et al. The genomic location of a CDS (LOC107329567) is shown with a gray arrow on the scaffold (NW_015442398.1). % Genome Disordered % Genome Disordered in SCOP Domains Avg. Science 321, 560–563 (2008), Weis, V. M. Cellular mechanisms of cnidarian bleaching: stress causes the collapse of symbiosis. The repertoire of Toll/TLR, IL-1R-like and TIR-only proteins is significantly more complex in the case of A. digitifera than in N. vectensis or H. magnipapillata. (2020). In total, 16,292 (61.21%) genes have clear homology to proteins in the Swiss-Prot database, with an additional 7,946 (29.86%) genes in the TrEMBL database. 2008), possibly reflecting DNA repair (Pont-Kingdon et al. A. et al. This licence does not permit commercial exploitation, and derivative works must be licensed under the same or similar licence. The Acropora Digitifera Genome The genome of A. digitifera , decoded using next-generation sequencing technology, is ~420-Mbp in size, 39% G+C, and contains 23,668 predicted protein-coding loci ( … High-molecular-weight genomic DNA was prepared using a method based on that described by Blin and Stafford (1976). (f, g) Circos plots showing relationships between the A. millepora and A. digitifera genomes. The version described in this article is version QTZP01000000. Photoprotective compounds from marine organisms. AUGUSTUS 2.0.4 was trained on the 877 EST assemblies recommended by PASA38 for this purpose. RNA was extracted as previously described (Moya et al. Reef-building Scleractinia first appeared in the fossil record in the mid-Triassic (approximately 240 million years ago)5, but were already highly diversified, suggesting much earlier origins. Under permits from the Aquaculture Agency of Okinawa Prefecture (the number 20–27), part of an A. digitifera colony was collected and has subsequently been maintained in an aquarium at the Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus. Detailed descriptions of assembly methods are provided in Supplementary Materials online. 12, 1599–1610 (2002), Eddy, S. R. Profile hidden Markov models. Corals inhabit environments where they are frequently exposed to high levels of solar radiation, and analysis of the Acropora genome data indicates that the coral host can independently carry out de novo synthesis of mycosporine-like amino acids, which are potent ultraviolet-protective compounds. Well-defined PFAM-A protein domains were identified in 63.98% of annotated genes, and unambiguous Kyoto Encyclopedia of Genes and Genomes K numbers were assigned to 48.47% of genes. However, unlike several other corals, Acropora seems to lack an enzyme essential for cysteine biosynthesis, implying dependency of this coral on its symbionts for this amino acid. 2), indicating that both the coral and the sea anemone have the ability to carry out de novo synthesis of ultraviolet-protective compounds. A second approach used in the case of genes encoding proteins with one or more specific protein domains, was to screen the merged models against the Pfam database (Pfam-A.hmm, release 24.0; http://pfam.sanger.ac.uk)30, which contains 11,912 conserved domains using HMMER (hmmer3)41. Surveys of Acropora for genes associated with innate immunity18, apoptosis19 and autophagy19 indicate not only the complexity of these systems in Acropora (Supplementary Figs 13–23), but also that the coral innate immune repertoire is more sophisticated than that of Nematostella. High-molecular The Acropora and Nematostella genomes contain homologues of each of the four genes, in which DHQS-like and O-MT are fused with each other. Fittingly, the first coral genome to be sequenced was Acropora digitifera; the availability of this whole-genome sequence (Shinzato et al. We further applied HaploMerger (Huang et al. The two species are shown in figure 1a–d . The genome of A.millepora (fig. Top, the organization of the gene cluster involved in the biosynthetic pathway of the photo-protective molecule shinorine, a mycosporine-like amino acid, in the cyanobacterium Anabaena variabilis. Nucleic Acids Res. (inset, enlargement). Nucleic Acids Res. You are using a browser version with limited support for CSS. Coral bleaching: the winners and the losers. Genome sequencing in microfabricated high-density picolitre reactors. 94,200 aligned amino acid positions of proteins encoded by 422 genes were obtained from the sponge Amphimedon queenslandica, from the cnidarians A. digitifera, Nematostella vectensis and Hydra magnipapillata, and from the triploblasts Tribolium castaneum, Drosophila melanogaster, Branchiostoma floridae, Danio rerio and Homo sapiens. On the basis of flow cytometry, the A. digitifera genome is approximately 420 Mbp (Supplementary Figs 1 and 2) and is therefore similar in size to that of the sea anemone Nematostella9. 2018) programs. 37, 537–558 (2010), Balskus, E. P. & Walsh, C. T. The genetic and molecular basis for sunscreen biosynthesis in cyanobacteria. A set of gene model predictions (the A. digitifera Gene Model v. 1) was generated mainly by AUGUSTUS29, and a genome browser has been established using the Generic Genome Browser (GBrowser) 2.17. To obtain Dev. NCBI; Skip to main content; Skip to navigation; Resources. a, The colony the genome of which was sequenced in the present study. the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Gaps and ambiguous areas were excluded using Gblocks 0.91b43 with the default parameters and then checked manually. The coral seems to have lost a key enzyme of cysteine biosynthesis, so may be dependent on its symbionts for this amino acid. In the case of complex multigene families, a third annotation method was used; sets of related sequences were subjected to phylogenetic analyses to determine more precisely orthology relationships. They are under threat because the scleractinian corals at their core are susceptible to ocean acidification and rising seawater temperatures. Clustal W and Clustal X version 2.0. The genomic DNA was fragmented, libraries prepared and sequencing conducted according to the manufacturer’s protocols. The file contains Supplementary Text, Supplementary Tables 1-13 and Supplementary Figures 1-25 with legends (see Table of Contents for details). Paired end (PE) and mate pair (MP) libraries were prepared and sequenced on an Illumina Genome Analyzer IIx at the Australian Genome Research Facility. The species page of 'Acropora digitifera'. Also know as '(German: Kleinpolypige Steinkoralle)'. Meanwhile, the gene model presented here is of considerably higher quality than the v1.0 models provided by Shinzato et al. 40). 3). The coral gene set is comparable in size and composition with those of Nematostella vectensis9 and Hydra magnipapillata12 (Supplementary Tables 6, 8 and 9). © The Author(s) 2018. On the basis of the alignment data sets, phylogenetic trees were constructed by neighbour joining and/or maximum likelihood. 2007). 24). AGRF acknowledges support from Bioplatforms Australia through funding from the National Collaborative Research Infrastructure Strategy. Please cite the following if you make use of D 2 P 2 as well as papers for any original prediction methods used. Genome Biol. & Karin, M. Intracellular pattern recognition receptors in the host response. 1e). The genome is approximately 39% G+C (Supplementary Fig. Science 291, 1913–1914 (2001), Wilkinson, C. Status of Coral Reefs of the World (Australian Institute of Marine Studies, 2004), Miller, D. J., Ball, E. E. & Technau, U. Cnidarians and ancestral genetic complexity in the animal kingdom. These factors have led to members of this genus often being the subjects of investigation into coral responses to various physical and biological stressors. Proc. CAS 6). The quality of the gene model data set was further assessed using the manually curated Swiss-Prot protein database, focusing on target coverage only because the query coverage is subject to potential inaccuracies in the lengths of predicted proteins, which are typically unknown. Hughes, T. P. et al. In addition to unfertilized eggs and adult samples, samples from six early life history stages were collected. Biol. The genome of the branching coral Acropora digitifera appears online today in … This work was supported in part by Grants-in-Aids from MEXT and JSPS, Japan. The classified transposable elements represent over 45 different families and show a slight preference for class I retrotransposons (supplementary table S8, Supplementary Material online). It contains several genes with roles in protection from ultraviolet light that may have been acquired by horizontal transfer from prokaryotic organisms. We conducted a ne-scale gene-based analysis focusing on ortholog groups. We thank Zoe Richards for the use of the coral photos (fig. Nature Anthozoan mitochondrial genomes typically evolve more slowly than the corresponding nuclear genomes (Huang et al. Genome Annotation De novo identification of repetitive elements was conducted on the A.milleporagenome assembly. Some coral genera are particularly sensitive to stress and, among these, Acropora is of particular significance because this is the dominant genus of reef-building corals in the Indo-Pacific. Microbiol. Our study focuses on Acropora digitifera of the Ryukyu Archipelago in Japan (Figure 1), an emblematic species of the Indo‐Pacific and flagship organism for studies on corals genomics (Shinzato et al., 2011). The super-computing was supported by the IT Section of OIST and the Human Genome Center, University of Tokyo. and JavaScript. The genome assembly hasbeendepositedwith theDNADatabank of Japan (DDBJ), the European Molecular Biology Laboratory (EMBL) and GenBank under project accession BACK01000001–BACK01053640 (contigs) and DF093604–DF097774 (scaffolds). , were used to examine the metabolic repertoire of amphioxus reveals extraordinary innate complexity acropora digitifera genome stochastic gene.! 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Of gene model was obtained from the National Collaborative Research Infrastructure Strategy RNAseq data sets, phylogenetic trees were as! Have led to members of this genus often being the subjects of investigation coral. The use of the coral Acropora millepora colony NCBI A. digitifera genes was BLAST... And Supplementary table S5, Supplementary Material online, for more detail this! Thaliacia and the environment we could find no evidence for a control and samples! Putative roles in calcification were identified, and the resilience of coral,., Shoguchi, Takeshi Kawashima and Mayuko Hamada: acropora digitifera genome authors contributed equally to this work biology and Evolution problems!