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Möglichkeiten zur Nutzung der autokatalytischen RNA-Replikation von Pflanzenviren für die Expressionsoptimierung von Fremdgenen

Possibilities for the use of the autocatalytic RNA replication of plant viruses for the improvement of foreign gene expression

Возможности использования авто-каталитической репликации РНК растительных вирусов для улучшения ¶rt;кспрессии чужеродных генов

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Zusammenfassung

Die Effektivität der Expression von Fremdgenen kann nicht nur auf der Ebene der Transkription, sondern auch auf posttranskriptionellem Niveau erhöht werden.

Durch Nutzung viraler genetischer Systeme, die sich unabhängig von ihrem Wirt replizieren, erscheint es möglich, die Genproduktmenge um Größenordnungen gegenüber dem bisher experimentell erreichbaren Niveau zu steigern. Der Grundgedanke besteht darin, einerseits virale Geninformation für eine funktionell aktive RNA-abhängige RNA-Polymerase stabil zu transferieren und zu exprimieren und andererseits die mRNA, die für das interessierende Genprodukt kodiert, mit den Erkennungssequenzen für die Virusreplikase auszustatten, so daß es zu der gewünschten mRNA-Amplifikation kommt.

Summary

The efficiency of expression for foreign genes may be increased not only on the transcriptional but also posttranscriptional level. Using viral genetic systems which replicate independently on the host, it seems to be possible to increase the amount of gene product for several orders of magnitude in comparison with the hitherto experimentally reachable level.

The basic idea consists, on the one hand, in the stable transfer and expression of gene information for the produktion of functionally active RNA-dependent RNA polymerase and, on the other hand, in altering the mRNA, which encodes for the gene product in question that it exhibits the recognition sequences for the viral replicase. In this way, finally, the desired mRNA will be amplificated.

Резюме

Эффективность ¶rt;кспрессии чужеродных генов может быть повышена не только на уровне транскрипции, но и на посттранскрилцио нном уровне.

Посредством использования вирусных генетических систем, реплицирующихся независимо от хозяина, кажется возможным повысить количество генного лродукта на несколько порядков по сравнению с уровнем экспериментально достигнутым до сих пор.

Основная идея заключается в том, чтобы, с одной стороны, стабильно переносить и ¶rt;кспрессировать вирусные гены функционально активной РНК-зависимой РНК-полимеразы и, с другой стороны, снабжать мРНК, кодирующую за интересующий генный продукт последовательнос тями узнавания вирусной репликазы, так что в конечном счете желаемая мРНК амплифицировалась бы.

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Leiser, RM. Möglichkeiten zur Nutzung der autokatalytischen RNA-Replikation von Pflanzenviren für die Expressionsoptimierung von Fremdgenen. Die Kulturpflanze 38, 81–90 (1990). https://doi.org/10.1007/BF01998617

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