PUBLICATION DATE

2012-11-06

AUTHORS

S. V. Dolgov, I. V. Korneeva, A. P. Firsov, A. S. Pushin

TITLE

Transgenic tomato plants as supersweet protein thaumatin II producers

ISSUE

9

VOLUME

48

ISSN (print)

0003-6838

ISSN (electronic)

1608-3024

ABSTRACT

Yalf tomato plants have been transformed with a gene for thaumatin II from Thaumatococcus daniellii Benth. The nucleotide sequence for thaumatin II cDNA was cloned in the pBI121 vector under the control of the CaMV 35S promoter of cauliflower mosaic virus. Expression of the thaumatin II gene was detected in all of the studied transgenic lines. A quantitative estimation of the thaumatin II accumulation in fruits was performed by ELISA. The highest content of thaumatin in transgenic tomato fruits (line 91) was 46.4 ± 10.5 μg/mg of total soluble protein (4.6%). In the other studied lines, the thaumatin content ranged from 17.6 ± 6.1 to 41.3 ± 12.3 μg/mg of total soluble protein (1.8–4.1%). The fruits of transgenic plants had a well-defined sweet taste with a long aftertaste typical of thaumatin II. Transgenic tomato lines with high expression levels can be potentially used as producers of thaumatin for the food and pharmaceutical industries.

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37 TRIPLES      30 PREDICATES      37 URIs      21 LITERALS

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1 articles:fa65356d974f98b7f5183fc66f4af884 sg:abstract Abstract Yalf tomato plants have been transformed with a gene for thaumatin II from Thaumatococcus daniellii Benth. The nucleotide sequence for thaumatin II cDNA was cloned in the pBI121 vector under the control of the CaMV 35S promoter of cauliflower mosaic virus. Expression of the thaumatin II gene was detected in all of the studied transgenic lines. A quantitative estimation of the thaumatin II accumulation in fruits was performed by ELISA. The highest content of thaumatin in transgenic tomato fruits (line 91) was 46.4 ± 10.5 μg/mg of total soluble protein (4.6%). In the other studied lines, the thaumatin content ranged from 17.6 ± 6.1 to 41.3 ± 12.3 μg/mg of total soluble protein (1.8–4.1%). The fruits of transgenic plants had a well-defined sweet taste with a long aftertaste typical of thaumatin II. Transgenic tomato lines with high expression levels can be potentially used as producers of thaumatin for the food and pharmaceutical industries.
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32 sg:scigraphId fa65356d974f98b7f5183fc66f4af884
33 sg:title Transgenic tomato plants as supersweet protein thaumatin II producers
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