Siefritz, F. ; Biela, A. ; Eckert, M. ; Otto, Beate ; Uehlein, Norbert ; Kaldenhoff, Ralf (2001)
The tobacco plasma membrane aquaporin NtAQP1.
In: Journal of experimental botany, 52 (363)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
This paper gives a summary of a project to characterize a tobacco aquaporin. The cDNA and gene, including the 5' upstream region, for the tobacco aquaporin NtAQP1 has been isolated and the encoded protein characterized. The significance of promoter regions for an abscisic acid- and gibberellic acid-induced gene expression could be restricted to a region between -1450 and -1112 upstream of the transcription start point by transient transformation of a bicistronic vector into tobacco protoplasts. NtAQP1 expression in tobacco plants was found to be elevated in flowers, stems and roots. In roots, the protein was detected close to xylem vessels in pitch-like structures. Studies with a NtAQP1-GFP fusion indicated a plasma membrane location. For a functional analysis, the cDNA was expressed in Xenopus oocytes. NtAQP1 was found to be a heavy metal-insensitive aquaporin with additional permeability for glycerol. Mutation of a threonine at position 233 to a cysteine transformed NtAQP1 into a heavy metal-sensitive aquaporin.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2001 |
| Autor(en): | Siefritz, F. ; Biela, A. ; Eckert, M. ; Otto, Beate ; Uehlein, Norbert ; Kaldenhoff, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | The tobacco plasma membrane aquaporin NtAQP1. |
| Sprache: | Englisch |
| Publikationsjahr: | 2001 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of experimental botany |
| Jahrgang/Volume einer Zeitschrift: | 52 |
| (Heft-)Nummer: | 363 |
| Kurzbeschreibung (Abstract): | This paper gives a summary of a project to characterize a tobacco aquaporin. The cDNA and gene, including the 5' upstream region, for the tobacco aquaporin NtAQP1 has been isolated and the encoded protein characterized. The significance of promoter regions for an abscisic acid- and gibberellic acid-induced gene expression could be restricted to a region between -1450 and -1112 upstream of the transcription start point by transient transformation of a bicistronic vector into tobacco protoplasts. NtAQP1 expression in tobacco plants was found to be elevated in flowers, stems and roots. In roots, the protein was detected close to xylem vessels in pitch-like structures. Studies with a NtAQP1-GFP fusion indicated a plasma membrane location. For a functional analysis, the cDNA was expressed in Xenopus oocytes. NtAQP1 was found to be a heavy metal-insensitive aquaporin with additional permeability for glycerol. Mutation of a threonine at position 233 to a cysteine transformed NtAQP1 into a heavy metal-sensitive aquaporin. |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie > Applied Plant Sciences ?? fb10_botanik ?? 10 Fachbereich Biologie |
| Hinterlegungsdatum: | 31 Aug 2011 13:05 |
| Letzte Änderung: | 05 Mär 2013 09:54 |
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