Article (Scientific journals)
Possible consequences of the overlap between the CaMV 35S promoter regions in plant transformation vectors used and the viral gene VI in transgenic plants.
Podevin, Nancy; du Jardin, Patrick
2012In GM Crops and Food, 3 (4), p. 296-300
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Keywords :
Algorithms; Allergens/genetics; Caulimovirus/genetics; Computational Biology; Genes, Viral/genetics; Genetic Vectors/genetics; Humans; Open Reading Frames/genetics; Plants, Genetically Modified; Promoter Regions, Genetic; Transformation, Genetic
Abstract :
[en] Multiple variants of the Cauliflower mosaic virus 35S promoter (P35S) are used to drive the expression of transgenes in genetically modified plants, for both research purposes and commercial applications. The genetic organization of the densely packed genome of this virus results in sequence overlap between P35S and viral gene VI, encoding the multifunctional P6 protein. The present paper investigates whether introduction of P35S variants by genetic transformation is likely to result in the expression of functional domains of the P6 protein and in potential impacts in transgenic plants. A bioinformatic analysis was performed to assess the safety for human and animal health of putative translation products of gene VI overlapping P35S. No relevant similarity was identified between the putative peptides and known allergens and toxins, using different databases. From a literature study it became clear that long variants of the P35S do contain an open reading frame, when expressed, might result in unintended phenotypic changes. A flowchart is proposed to evaluate possible unintended effects in plant transformants, based on the DNA sequence actually introduced and on the plant phenotype, taking into account the known effects of ectopically expressed P6 domains in model plants.
Disciplines :
Biotechnology
Author, co-author :
Podevin, Nancy
du Jardin, Patrick  ;  Université de Liège - ULiège > Sciences agronomiques > Biologie végétale
Language :
English
Title :
Possible consequences of the overlap between the CaMV 35S promoter regions in plant transformation vectors used and the viral gene VI in transgenic plants.
Publication date :
2012
Journal title :
GM Crops and Food
ISSN :
2164-5698
eISSN :
2164-5701
Publisher :
Landes Bioscience, United States - Texas
Volume :
3
Issue :
4
Pages :
296-300
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 June 2014

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