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A population specific mitochondrial intron from the sponge Phakellia robusta in the North-East Atlantic

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dc.contributor.authorCranston, Alex
dc.contributor.authorTaboada, Sergi
dc.contributor.authorKoutsouveli, Vasiliki
dc.contributor.authorSchuster, Astrid
dc.contributor.authorRiesgo, Ana
dc.date.accessioned2023-06-17T09:19:19Z
dc.date.available2023-06-17T09:19:19Z
dc.date.issued2021-04-06
dc.description.abstractSelf-splicing mitochondrial introns are a rarely reported phenomenon in animals, with a sparse and uneven distribution confined to some species of sponges, corals, placozoans, and a single species of annelid. Here, we describe a mitochondrial intron present only in some populations of Phakellia robusta, a sponge distributed across the North-east Atlantic deep-sea. The mitochondrial intron of P. robusta was detected in the position 387 of the COI gene and classified as a Group I intron of class IB. Interestingly, this intron was only detected in the shallower populations of P. robusta from Ireland to Norway, spanning 1000 km and was absent in deeper samples of the species. Such deeper populations have recently been proposed to be the result of hybridization between P. robusta and its congeneric Phakellia hirondellei. We propose that this past hybridization might be behind the absence of the intron in the specimens of P. robusta occurring at deep waters. Our analyses indicate that the intron detected in P. robusta might have a double origin (most likely fungi and other organism), as it has previously suggested for the sponge Stupenda singularis. BLAST searches produced matches with the homing endonuclease gene (HEG) nested within the S. singularis intron and this HEG belongs to the family of LAGLIDADG homing endonucleases (LHEs). The evolutionary relevance of the presence/absence of this intron for this species needs to be determined and potential adaptive advantages should not be ruled out.
dc.description.departmentDepto. de Biodiversidad, Ecología y Evolución
dc.description.facultyFac. de Ciencias Biológicas
dc.description.refereedTRUE
dc.description.sponsorshipUnión Europea. H2020
dc.description.sponsorshipVillum Fonden
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/69349
dc.identifier.doi10.1016/j.dsr.2021.103534
dc.identifier.issn0967-0637
dc.identifier.officialurlhttps://doi.org/10.1016/j.dsr.2021.103534
dc.identifier.urihttps://hdl.handle.net/20.500.14352/8595
dc.issue.number103534
dc.journal.titleDeep Sea Research Part I: Oceanographic Research Papers
dc.language.isoeng
dc.page.final7
dc.page.initial1
dc.publisherElsevier
dc.relation.projectIDSponGES (679849)
dc.relation.projectID(no. 16518)
dc.rights.accessRightsrestricted access
dc.subject.cdu593.4
dc.subject.keywordSelf-splicing mitochondrial intron
dc.subject.keywordHoming endonuclease gene (HEG)
dc.subject.keywordLAGLIDADG homing Endonucleases (LHEs)
dc.subject.keywordHybridization
dc.subject.keywordPorifera
dc.subject.keywordHorizontal gene transfer
dc.subject.keywordIntron presence/absence polymorphism
dc.subject.ucmInvertebrados
dc.subject.unesco2401.17 Invertebrados
dc.titleA population specific mitochondrial intron from the sponge Phakellia robusta in the North-East Atlantic
dc.typejournal article
dc.volume.number172
dspace.entity.typePublication
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