High affinity ammonium transporter probably involved in ammonium uptake from the soil, long-distance transport to the shoots and re-uptake of apoplastic ammonium that derives from photorespiration in shoots. Contributes with AMT1-3 to the overall ammonium uptake capacity in roots under nitrogen-deficiency conditions.
Score = 61.5 bits (150), Expect = 2e-12
Identities = 27/112 (24%), Positives = 42/112 (37%), Gaps = 29/112 (25%)
Query: 9 WVLIGLNILAIKLNFDDPLEATRLHGGWGFIGS--------------------------- 41
+ ++ L KL DDPL+A +HG G G
Sbjct: 292 LCYLAVSKLKKKLKIDDPLDAFAVHGVGGIWGLIATGLFAAPKVGGVGTGGLLGGNGKQL 351
Query: 42 --QVTELSVIVGWVRETMGPLFHALHKLKMLRILEDEEITGLDISSDSGYAY 91
Q+ ++ I+ W + L K LR+ E+EE GLD++ +AY
Sbjct: 352 GVQLIGIAAIIAWAFVVTFIILKILDKTIGLRVSEEEEKIGLDLAEHGEFAY 403
The Ammonium Transporter (Amt) Family (TC 2.A.49) All functionally characterized members of the Amt family are ammonia or ammonium uptake transporters. Some, but not others, also transport methylammonium. The mechanism of energy coupling, if any, to methyl-NH2 or NH3 uptake by the AmtB protein of E. coli is not entirely clear. NH4+ uniport driven by the pmf, energy independent NH3 facilitation, and NH4+/K+ antiport have been proposed as possible transport mechanisms. In Corynebacterium glutamicum and Arabidopsis thaliana, uptake via the Amt1 homologues of AmtB has been reported to be driven by the pmf [Transport and binding proteins, Cations and iron carrying compounds]. Length = 403
>gnl|CDD|216185 pfam00909, Ammonium_transp, Ammonium Transporter Family
Score = 39.3 bits (92), Expect = 1e-04
Identities = 26/90 (28%), Positives = 42/90 (46%), Gaps = 15/90 (16%)
Query: 10 VLIGLNILAI-KLNFDDPLEATRLHGGWGFIG--------------SQVTELSVIVGWVR 54
V++ +I+ + KL DDP+ A +HG G G +Q+ + I WV
Sbjct: 305 VIVVFSIVLLDKLKIDDPVGAISVHGVAGIWGTLVVPITNGDASFGAQLIGAATIFAWVF 364
Query: 55 ETMGPLFHALHKLKMLRILEDEEITGLDIS 84
T ++ L +R+ E+EE GLDI+
Sbjct: 365 VTSLIVWFILKATMGIRVSEEEEYEGLDIA 394
Members of this protein family are well conserved subclass of putative ammonimum transporters, belonging to the much broader set of ammonium/methylammonium transporter described by TIGR00836. Species with this transporter tend to be marine bacteria. Partial phylogenetic profiling (PPP) picks a member of this protein family as the single best-scoring protein vs. a reference profile for the marine environment Genome Property for a large number of different query genomes. This finding by PPP suggests that this transporter family represents an important adaptation to the marine environment. Length = 404
Members of this protein family are well conserved subclass of putative ammonimum transporters, belonging to the much broader set of ammonium/methylammonium transporter described by TIGR00836. Species with this transporter tend to be marine bacteria. Partial phylogenetic profiling (PPP) picks a member of this protein family as the single best-scoring protein vs. a reference profile for the marine environment Genome Property for a large number of different query genomes. This finding by PPP suggests that this transporter family represents an important adaptation to the marine environment.
The mechanism of energy coupling, if any, to methyl-NH2 or NH3 uptake by the AmtB protein of E. coli is not entirely clear. NH4+ uniport driven by the pmf, energy independent NH3 facilitation, and NH4+/K+ antiport have been proposed as possible transport mechanisms. In Corynebacterium glutamicum and Arabidopsis thaliana, uptake via the Amt1 homologues of AmtB has been reported to be driven by the pmf.
>PF00909 Ammonium_transp: Ammonium Transporter Family; InterPro: IPR024041 This ammonium transporter domain consists of a duplication of 2 structural repeats of five helices each plus one extra C-terminal helix
It has been described as a channel that spans the membrane 11 times [].; PDB: 3B9Z_A 3B9Y_A 3B9W_A 3BHS_A 2B2H_A 2B2J_A 2B2F_A 2B2I_A 2NPG_A 2NUU_E ....
>KOG3796 consensus Ammonium transporter RHBG [Intracellular trafficking, secretion, and vesicular transport; General function prediction only]