ArticleImmunogenetics2014
Convergent evolution of IL-6 in two leporids (Oryctolagus and Pentalagus) originated an extended protein.
Article in Immunogenetics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 12 citations in OpenAlex.
- Liver regeneration observed across the different classes of vertebrates from an evolutionary perspective.Heliyon · 2021Review
- An overview of the lagomorph immune system and its genetic diversity.Immunogenetics · 2016Review
- Molecular characterization and analysis of TLR-1 in rabbit tissues.Central-European journal of immunology · 2016Article
- Genetic characterization of interleukins (IL-1α, IL-1β, IL-2, IL-4, IL-8, IL-10, IL-12A, IL-12B, IL-15 and IL-18) with relevant biological roles in lagomorphs.Innate immunity · 2015Article
- The fungal defensin family enlarged.Pharmaceuticals (Basel, Switzerland) · 2014Review
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Interleukin 6 (IL-6) is a class-I helical cytokine with a broad spectrum of biological activities and a gene structure conserved throughout vertebrates, with five coding exons. IL-6 from European rabbits belonging to the subspecies Oryctolagus cuniculus cuniculus was previously shown to differ from other mammals by extending an additional 27 amino acids. However, in other leporids (Sylvilagus spp and Lepus spp) that diverged from the European rabbit ~12 million years ago this mutation was not present. In this study, we extended the study of IL-6 for the Oryctolagus cuniculus algirus subspecies and five additional lagomorphs' genera (Brachylagus, Bunolagus, Pentalagus, Romerolagus, and Ochotona). We confirmed the presence of the mutated stop codon in both O. c. cuniculus and O. c. algirus. We found that the typical stop codon is present in Sylvilagus bachmani and Lepus europaeus, in agreement with previous reports, but also in Bunolagus, Brachylagus, and Ochotona. Remarkably, in Pentalagus we detected a deletion of the stop codon causing an extension of IL-6 for 17 extra residues. Our results indicate that the IL-6 extension in those species occurred by two independent events: one occurred between 2 and 8 million years ago in the ancestral of the Oryctolagus subspecies, and the other occurred in a Pentalagus ancestral at a maximum of 9 million years ago. The absence of this IL-6 extension in Bunolagus, sister genus of Oryctolagus, shows that this evolutionary event happened by convergence suggesting some functional relevance.
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