Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii
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| Language: | English |
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Bowling Green State University / OhioLINK
2018
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-bgsu1542297599453682021-08-03T07:08:53Z Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii Cooper, Lizette Biology Bioinformatics Evolution and Development Genetics Wildlife Conservation Sharks Biology Biochemistry Genetics Phylogenetics DNA Alignments RNA Structures Group I introns Internal transcribed spacers 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. 2018-11-29 English text Bowling Green State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368 http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Biology Bioinformatics Evolution and Development Genetics Wildlife Conservation Sharks Biology Biochemistry Genetics Phylogenetics DNA Alignments RNA Structures Group I introns Internal transcribed spacers |
| spellingShingle |
Biology Bioinformatics Evolution and Development Genetics Wildlife Conservation Sharks Biology Biochemistry Genetics Phylogenetics DNA Alignments RNA Structures Group I introns Internal transcribed spacers Cooper, Lizette Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii |
| author |
Cooper, Lizette |
| author_facet |
Cooper, Lizette |
| author_sort |
Cooper, Lizette |
| title |
Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii |
| title_short |
Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii |
| title_full |
Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii |
| title_fullStr |
Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii |
| title_full_unstemmed |
Evolutionary investigation of group I introns in nuclear ribosomal internal transcribed spacers in Neoselachii |
| title_sort |
evolutionary investigation of group i introns in nuclear ribosomal internal transcribed spacers in neoselachii |
| publisher |
Bowling Green State University / OhioLINK |
| publishDate |
2018 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu154229759945368 |
| work_keys_str_mv |
AT cooperlizette evolutionaryinvestigationofgroupiintronsinnuclearribosomalinternaltranscribedspacersinneoselachii |
| _version_ |
1719454680672632832 |