Deletion analysis of the 3' long terminal repeat sequence of plant retrotransposon Tto1 identifies 125 base pairs redundancy as sufficient for first strand transfer
| Autor: | Andreas Bachmair, Kristin Reiche, Peter F. Stadler, Alexander Donath, Gudrun Böhmdorfer, Stephan H. Bernhart, Andrea Tramontano |
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| Přispěvatelé: | Publica |
| Rok vydání: | 2010 |
| Předmět: |
DNA
Plant Retroelements Base pair viruses Molecular Sequence Data First strand transfer Retrotransposon Biology Models Biological Article Strand transfer 03 medical and health sciences Long terminal repeat Virology Complementary DNA Redundancy region Promoter Regions Genetic 030304 developmental biology Sequence Deletion Genetics Recombination Genetic Terminator Regions Genetic 0303 health sciences Messenger RNA Base Sequence 030302 biochemistry & molecular biology fungi Terminal Repeat Sequences Promoter Plants Terminator (genetics) Tto1 Nucleic Acid Conformation |
| Zdroj: | Virology |
| ISSN: | 1096-0341 |
| Popis: | Retroviruses and many retrotransposons are flanked by sequence repeats called long terminal repeats (LTRs). These sequences contain a promoter region, which is active in the 5′ LTR, and transcription termination signals, which are active in the LTR copy present at the 3′ end. A section in the middle of the LTR, called Redundancy region, occurs at both ends of the mRNA. Here we show that in the copia type retrotransposon Tto1, the promoter and terminator functions of the LTR can be supplied by heterologous sequences, thereby converting the LTR into a significantly shorter sub-terminal repeat. An engineered Tto1 element with 125 instead of the usual 574 base pairs repeated in the 5′ and 3′ region can still promote strand transfer during cDNA synthesis, defining a minimal Redundancy region for this element. Based on this finding, we propose a model for first strand transfer of Tto1. |
| Databáze: | OpenAIRE |
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