Publication Repository

Secondary Structure of the rRNA ITS2 Region Reveals Key Evolutionary Patterns in Acroporid Corals

Show simple item record

dc.contributor Australian Institute Of Marine Science
dc.contributor Brown Univ
dc.contributor Brown University
dc.contributor Div Biol & Med
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science (aims) en VAN OPPEN, MADELEINE J. H. COLEMAN, ANNETTE W. 2017-03-21T01:21:29Z 2017-03-21T01:21:29Z 2013-02-28T06:50:13Z 2019-05-09T01:24:29Z 2013-02-28T06:50:13Z 2013-02-28T06:50:13Z 2017-03-21T01:21:29Z 2019-05-09T01:24:29Z 2008-10-01
dc.identifier 7898 en
dc.identifier.citation Coleman AW and van Oppen MJH (2008) Secondary structure of the rRNA ITS2 region reveals key evolutionary patterns in acroporid corals. Journal of Molecular Evolution. 67: 389-396. en
dc.identifier.issn 0022-2844
dc.description Link to abstract/full text - en
dc.description.abstract This study investigates the ribosomal RNA transcript secondary structure in corals as confirmed by compensatory base changes in Isopora/Acropora species. These species are unique versus all other corals in the absence of a eukaryote-wide conserved structural component, the helix III in internal transcriber spacer (ITS) 2, and their variability in the 5.8S-LSU helix basal to ITS2, a helix with pairings identical among all other scleractinian corals. Furthermore, Isopora/Acropora individuals display at least two, and as many as three, ITS sequence isotypes in their genome which appear to be capable of function. From consideration of the conserved elements in ITS2 and flanking regions, it appears that there are three major groups within the IsoporaAcropora lineage: the Isopora + Acropora "longi" group, the large group including Caribbean Acropora + the Acropora "carib" types plus the bulk of the Indo-Pacific Acropora species, and the remaining enigmatic "pseudo" group found in the Pacific. Interbreeding is possible among Caribbean A. palmata and A. cervicornis and among some species of Indo-Pacific Acropora. Recombinant ITS sequences are obvious among these latter, such that morphology (as represented by species name) does not correlate with common ITS sequence. The combination of characters revealed by RNA secondary structure analyses suggests a recent past/current history of interbreeding among the Indo-Pacific Acropora species and a shared ancestry of some of these with the Caribbean Acropora. The unusual absence of helix III of ITS2 of Isopora/Acropora species may have some causative role in the equally unusual instability in the 5.8S-LSU helix basal to ITS2 of this species complex.
dc.description.uri en
dc.language English
dc.language en en
dc.relation.ispartof Journal of Molecular Evolution - pages: 67: 389-396 en
dc.relation.ispartof Null
dc.subject Phylogeny
dc.subject Genus Acropora
dc.subject Ribosomal Rna
dc.subject Corals
dc.subject Its2 Transcript Secondary Structure
dc.subject Acropora
dc.subject Mitochondrial
dc.subject Species Boundaries
dc.subject Hybridization
dc.subject Scleractinian Corals
dc.subject Dna
dc.subject Scleractinia
dc.subject Biochemistry & Molecular Biology
dc.subject Genetics & Heredity
dc.subject History
dc.subject Genetic-evidence
dc.subject Evolutionary Biology
dc.subject Cnidaria
dc.title Secondary Structure of the rRNA ITS2 Region Reveals Key Evolutionary Patterns in Acroporid Corals
dc.type journal article en
dc.identifier.doi 10.1007/s00239-008-9160-y
dc.identifier.wos WOS:000260282700007

Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Publication


My Account