Mechanisms of spliceosomal introns loss and gain
Introns are non-coding sequences within the genes. They seemed to be just "junk" DNA, although currently are considered as important genetic elements influencing the genome functions, as they increase the diversity of transcriptome and proteome, perform regulatory activities in the cell, affect gene expression, mRNA processing, degradation and translation. Based on the mechanism of their excision, introns were classified into three main categories: spliceosomal, self-splicing and tRNA introns. Spliceosomal introns are unique for eukaryotic organisms. Sequence analyses of orthologous genes in different groups of eukaryotes revealed many cases of intron gains and losses due to the multiple mechanisms. Some of these events took place in the distant past, while others happened relatively recently. It is believed that these processes can act as one of the forces driving the evolution of eukaryotic genes.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:65 |
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| Enthalten in: |
Postepy biochemii - 65(2019), 4 vom: 11. Dez., Seite 289-298 |
| Sprache: |
Polnisch |
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| Weiterer Titel: |
Mechanizmy utraty i nabywania intronów spliceosomalnych |
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| Beteiligte Personen: |
Ignatenko, Antonina [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 31.01.2020 Date Revised 31.01.2020 published: Electronic Citation Status MEDLINE |
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| doi: |
10.18388/pb.2019_292 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM305435914 |
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| 520 | |a Introns are non-coding sequences within the genes. They seemed to be just "junk" DNA, although currently are considered as important genetic elements influencing the genome functions, as they increase the diversity of transcriptome and proteome, perform regulatory activities in the cell, affect gene expression, mRNA processing, degradation and translation. Based on the mechanism of their excision, introns were classified into three main categories: spliceosomal, self-splicing and tRNA introns. Spliceosomal introns are unique for eukaryotic organisms. Sequence analyses of orthologous genes in different groups of eukaryotes revealed many cases of intron gains and losses due to the multiple mechanisms. Some of these events took place in the distant past, while others happened relatively recently. It is believed that these processes can act as one of the forces driving the evolution of eukaryotic genes | ||
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