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231223s2006 xx ||||| 00| ||eng c |
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Zhigang, An
|e verfasserin
|4 aut
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|a Expression of BjMT2, a metallothionein 2 from Brassica juncea, increases copper and cadmium tolerance in Escherichia coli and Arabidopsis thaliana, but inhibits root elongation in Arabidopsis thaliana seedlings
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|c 2006
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|a Text
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|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
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|2 rdamedia
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|2 rdacarrier
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|a Date Completed 27.02.2007
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|a Date Revised 09.01.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The protective function of a plant type-2 metallothionein was analysed after expression in Escherichia coli and in Arabidopsis thaliana seedlings. BjMT2 from Brassica juncea was expressed in E. coli as a TrxABjMT2 fusion protein. After affinity chromatography and cleavage from the TrxA domain, pure BjMT2 protein was obtained which strongly reacted with the thiol reagent monobromobimane. Escherichia coli cells expressing the TrxABjMT2 fusion were more tolerant to Cu2+ and Cd2+ exposure than control strains. Likewise, when BjMT2 cDNA was expressed in A. thaliana under the regulation of the 35S promoter, seedlings exhibited an increased tolerance against Cu2+ and Cd2+ based on shoot growth and chlorophyll content. Analysis of transiently transformed cells of A. thaliana and tobacco leaves by confocal laser scanning microscopy (CLSM) revealed exclusive cytosolic localization of a BjMT2::EGFP (enhanced green fluorescent protein) fusion protein in control and heavy metal-exposed plant cells. Remarkably, ectopic expression of BjMT2 reduced root growth in the absence of heavy metal exposure, whereas in the presence of 50 or 100 microM Cu2+ root growth in control and transgenic lines was identical. The results indicate that in A. thaliana, root and shoot development are differentially affected by ectopic expression of BjMT2
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Plant Proteins
|2 NLM
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|a Recombinant Fusion Proteins
|2 NLM
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|a Trace Elements
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|a Cadmium
|2 NLM
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|a 00BH33GNGH
|2 NLM
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|a Thioredoxins
|2 NLM
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|a 52500-60-4
|2 NLM
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|a Copper
|2 NLM
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| 650 |
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|a 789U1901C5
|2 NLM
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| 650 |
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|a Metallothionein
|2 NLM
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| 650 |
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|a 9038-94-2
|2 NLM
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| 700 |
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|a Cuijie, Li
|e verfasserin
|4 aut
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|a Yuangang, Zu
|e verfasserin
|4 aut
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|a Yejie, Du
|e verfasserin
|4 aut
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|a Wachter, Andreas
|e verfasserin
|4 aut
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|a Gromes, Roland
|e verfasserin
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|a Rausch, Thomas
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 57(2006), 14 vom: 19., Seite 3575-82
|w (DE-627)NLM098182706
|x 0022-0957
|7 nnns
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|g volume:57
|g year:2006
|g number:14
|g day:19
|g pages:3575-82
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