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Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Discovery of SCORs: Anciently derived, highly conserved gene-associated repeats in stony corals.
Genomics 2017 October
Stony coral (Scleractinia) genomes are still poorly explored and many questions remain about their evolution and contribution to the success and longevity of reefs. We analyzed transcriptome and genome data from Montipora capitata, Acropora digitifera, and transcriptome data from 20 other coral species. To our surprise, we found highly conserved, anciently derived, Scleractinia COral-specific Repeat families (SCORs) that are abundant in all the studied lineages. SCORs form complex secondary structures and are located in untranslated regions and introns, but most abundant in intergenic DNA. These repeat families have undergone frequent duplication and degradation, suggesting a 'boom and bust' cycle of invasion and loss. We speculate that due to their surprisingly high sequence identities across deeply diverged corals, physical association with genes, and dynamic evolution, SCORs might have adaptive functions in corals that need to be explored using population genomic and function-based approaches.
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