Channel-like NH3 flux by ammonium transporter AtAMT2.
FEBS Lett
; 583(17): 2833-8, 2009 Sep 03.
Article
em En
| MEDLINE
| ID: mdl-19635480
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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Plantas
/
Arabidopsis
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Proteínas de Transporte de Cátions
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Proteínas de Arabidopsis
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Compostos de Amônio Quaternário
Limite:
Animals
Idioma:
En
Revista:
FEBS Lett
Ano de publicação:
2009
Tipo de documento:
Article