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Channel-like NH3 flux by ammonium transporter AtAMT2.

Neuhäuser, Benjamin and Dynowski, Marek and Ludewig, Uwe :
Channel-like NH3 flux by ammonium transporter AtAMT2.
In: FEBS letters, 583 (17) pp. 2833-8. ISSN 1873-3468
[Article] , (2009)

Abstract

Prokaryotes, plants and animals control ammonium fluxes by the regulated expression of ammonium transporters (AMTs) and/or the related Rhesus (Rh) proteins. Plant AMTs were previously reported to mediate electrogenic transport. Functional analysis of AtAMT2 from Arabidopsis in yeast and oocytes suggests that NH(4)(+) is the recruited substrate, but the uncharged form NH(3) is conducted. AtAMT2 partially co-localized with electrogenic AMTs and conducted methylamine with low affinity. This transport mechanism may apply to other plant ammonium transporters and explains the different capacities of AMTs to accumulate ammonium in the plant cell.

Item Type: Article
Erschienen: 2009
Creators: Neuhäuser, Benjamin and Dynowski, Marek and Ludewig, Uwe
Title: Channel-like NH3 flux by ammonium transporter AtAMT2.
Language: English
Abstract:

Prokaryotes, plants and animals control ammonium fluxes by the regulated expression of ammonium transporters (AMTs) and/or the related Rhesus (Rh) proteins. Plant AMTs were previously reported to mediate electrogenic transport. Functional analysis of AtAMT2 from Arabidopsis in yeast and oocytes suggests that NH(4)(+) is the recruited substrate, but the uncharged form NH(3) is conducted. AtAMT2 partially co-localized with electrogenic AMTs and conducted methylamine with low affinity. This transport mechanism may apply to other plant ammonium transporters and explains the different capacities of AMTs to accumulate ammonium in the plant cell.

Journal or Publication Title: FEBS letters
Volume: 583
Number: 17
Divisions: 10 Department of Biology > Plant Nutrition and Biomass
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10 Department of Biology
Date Deposited: 16 Mar 2010 13:06
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