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Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii

Cooper, Lizette
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368

Abstract Details

2018, Master of Science (MS), Bowling Green State University, Biological Sciences.
In an ongoing study of nuclear ribosomal DNA (rDNA) in fishes, unusually large (970 - 1418 bp) internal transcribed spacer (ITS1 and ITS2) regions were discovered in a wide diversity of members of the clade, Neoselachii (sharks, skates, and rays). This contrasts with the lengths for rDNA ITS regions in other eukaryotes, being larger by 30 to over 1000%. The additional segments of between 303 to 653 bp were due to insertions of single elements that have characteristics of group I introns, including conservation of structural and catalytic core regions. These spacer introns (spintrons) appear to be closest to the IC1 subgroup, although group I introns of any subtype have never been previously reported in the rRNA gene locus of any animal taxon. The aim for this study is to analyze the evolution of these spintrons. The current hypotheses are that these spintrons were inserted into an ancestor of Neoselachii and Batoidea, moved from one ITS region to the other, and then each evolved independently.
Scott Rogers, Dr (Advisor)
Paul Morris, Dr (Committee Member)
Vipaporn Phuntumart, Dr (Committee Member)
29 p.
Bioinformatics; Biology; Evolution and Development; Genetics; Wildlife Conservation
Sharks; Biology; Biochemistry; Genetics; Phylogenetics; DNA Alignments; RNA Structures; Group I introns; Internal transcribed spacers

Recommended Citations

Citations

  • Cooper, L. (2018). Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368

    APA Style (7th edition)

  • Cooper, Lizette. Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii. 2018. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368.

    MLA Style (8th edition)

  • Cooper, Lizette. "Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii." Master's thesis, Bowling Green State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368

    Chicago Manual of Style (17th edition)

bgsu154229759945368
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© 2018, all rights reserved.
This open access ETD is published by Bowling Green State University and OhioLINK.