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Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction
Group I intron-derived ribozymes can catalyze a variety of non-native reactions. For the trans-excision-splicing (TES) reaction, an intron-derived ribozyme from the opportunistic pathogen Pneumocystis carinii catalyzes the excision of a predefined region from within an RNA substrate with subsequent...
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Formato: | Texto |
Lenguaje: | English |
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Oxford University Press
2008
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2532722/ https://www.ncbi.nlm.nih.gov/pubmed/18684993 http://dx.doi.org/10.1093/nar/gkn507 |
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author | Dotson, P. Patrick Johnson, Ashley K. Testa, Stephen M. |
author_facet | Dotson, P. Patrick Johnson, Ashley K. Testa, Stephen M. |
author_sort | Dotson, P. Patrick |
collection | PubMed |
description | Group I intron-derived ribozymes can catalyze a variety of non-native reactions. For the trans-excision-splicing (TES) reaction, an intron-derived ribozyme from the opportunistic pathogen Pneumocystis carinii catalyzes the excision of a predefined region from within an RNA substrate with subsequent ligation of the flanking regions. To establish TES as a general ribozyme-mediated reaction, intron-derived ribozymes from Tetrahymena thermophila and Candida albicans, which are similar to but not the same as that from Pneumocystis, were investigated for their propensity to catalyze the TES reaction. We now report that the Tetrahymena and Candida ribozymes can catalyze the excision of a single nucleotide from within their ribozyme-specific substrates. Under the conditions studied, the Tetrahymena and Candida ribozymes, however, catalyze the TES reaction with lower yields and rates [Tetrahymena (k(obs)) = 0.14/min and Candida (k(obs)) = 0.34/min] than the Pneumocystis ribozyme (k(obs) = 3.2/min). The lower yields are likely partially due to the fact that the Tetrahymena and Candida catalyze additional reactions, separate from TES. The differences in rates are likely partially due to the individual ribozymes ability to effectively bind their 3′ terminal guanosines as intramolecular nucleophiles. Nevertheless, our results demonstrate that group I intron-derived ribozymes are inherently able to catalyze the TES reaction. |
format | Text |
id | pubmed-2532722 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2008 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-25327222008-09-16 Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction Dotson, P. Patrick Johnson, Ashley K. Testa, Stephen M. Nucleic Acids Res RNA Group I intron-derived ribozymes can catalyze a variety of non-native reactions. For the trans-excision-splicing (TES) reaction, an intron-derived ribozyme from the opportunistic pathogen Pneumocystis carinii catalyzes the excision of a predefined region from within an RNA substrate with subsequent ligation of the flanking regions. To establish TES as a general ribozyme-mediated reaction, intron-derived ribozymes from Tetrahymena thermophila and Candida albicans, which are similar to but not the same as that from Pneumocystis, were investigated for their propensity to catalyze the TES reaction. We now report that the Tetrahymena and Candida ribozymes can catalyze the excision of a single nucleotide from within their ribozyme-specific substrates. Under the conditions studied, the Tetrahymena and Candida ribozymes, however, catalyze the TES reaction with lower yields and rates [Tetrahymena (k(obs)) = 0.14/min and Candida (k(obs)) = 0.34/min] than the Pneumocystis ribozyme (k(obs) = 3.2/min). The lower yields are likely partially due to the fact that the Tetrahymena and Candida catalyze additional reactions, separate from TES. The differences in rates are likely partially due to the individual ribozymes ability to effectively bind their 3′ terminal guanosines as intramolecular nucleophiles. Nevertheless, our results demonstrate that group I intron-derived ribozymes are inherently able to catalyze the TES reaction. Oxford University Press 2008-09 2008-08-06 /pmc/articles/PMC2532722/ /pubmed/18684993 http://dx.doi.org/10.1093/nar/gkn507 Text en © 2008 The Author(s) http://creativecommons.org/licenses/by-nc/2.0/uk/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | RNA Dotson, P. Patrick Johnson, Ashley K. Testa, Stephen M. Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction |
title | Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction |
title_full | Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction |
title_fullStr | Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction |
title_full_unstemmed | Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction |
title_short | Tetrahymena thermophila and Candida albicans Group I intron-derived ribozymes can catalyze the trans-excision-splicing reaction |
title_sort | tetrahymena thermophila and candida albicans group i intron-derived ribozymes can catalyze the trans-excision-splicing reaction |
topic | RNA |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2532722/ https://www.ncbi.nlm.nih.gov/pubmed/18684993 http://dx.doi.org/10.1093/nar/gkn507 |
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