FEBS Letters
Volume 581, Issue 12 , Pages 2301-2308, 25 May 2007

Molecular mechanisms of ammonium transport and accumulation in plants

Edited by Ulf-Ingo Flügge and Julian Schroeder

Zentrum für Molekularbiologie der Pflanzen (ZMBP), Pflanzenphysiologie, Universität Tübingen, Auf der Morgenstelle 1, 72076 Tübingen, Germany

Received 31 January 2007; received in revised form 12 March 2007; accepted 14 March 2007. published online 22 March 2007.

Abstract 

The integral membrane proteins of the ammonium transporter (AMT/Rh) family provide the major route for shuttling ammonium across bacterial, archaeal, fungal and plant membranes. These proteins are distantly related to the Rh (rhesus) glycoproteins, which are absent in higher plants, but are present in many species, including bacteria and mammals. It appears that the large nitrogen requirement of plants resulted in unique strategies to acquire, capture and/or release ammonium. The biological function of plant ammonium transporters will be discussed and compared to other AMT/Rh proteins.

Abbreviations: AMT, ammonium transporter, MEP, methylammonium permease, RhAG, Rhesus glycoprotein A, MeA, methylammonium, CLC, chloride channel, GS, glutamine synthetase, TIP, tonoplast intrinsic protein

Keywords: Nitrogen, Rhesus glycoprotein, Gas channel, Ammonia toxicity

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PII: S0014-5793(07)00300-6

doi:10.1016/j.febslet.2007.03.034

FEBS Letters
Volume 581, Issue 12 , Pages 2301-2308, 25 May 2007

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