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| | ==Ammonium Transporter Amt-1 from A. fulgidus (Xe)== | | ==Ammonium Transporter Amt-1 from A. fulgidus (Xe)== |
| - | <StructureSection load='2b2j' size='340' side='right' caption='[[2b2j]], [[Resolution|resolution]] 1.85Å' scene=''> | + | <StructureSection load='2b2j' size='340' side='right'caption='[[2b2j]], [[Resolution|resolution]] 1.85Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2b2j]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Arcfl Arcfl]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2B2J OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2B2J FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2b2j]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Archaeoglobus_fulgidus Archaeoglobus fulgidus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2B2J OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2B2J FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=XE:XENON'>XE</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.85Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2b2f|2b2f]], [[2b2h|2b2h]], [[2b2i|2b2i]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=XE:XENON'>XE</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">amt1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2234 ARCFL])</td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2b2j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2b2j OCA], [https://pdbe.org/2b2j PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2b2j RCSB], [https://www.ebi.ac.uk/pdbsum/2b2j PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2b2j ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2b2j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2b2j OCA], [http://pdbe.org/2b2j PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2b2j RCSB], [http://www.ebi.ac.uk/pdbsum/2b2j PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2b2j ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/AMT1_ARCFU AMT1_ARCFU] Involved in the uptake of ammonium/ammonia (NH(4)(+)/NH(3)) (PubMed:22804733, PubMed:24958855). Transport is electrogenic (PubMed:22804733, PubMed:24958855). Transport the ammonium and methylammonium cation with high specificity (PubMed:24958855).<ref>PMID:22804733</ref> <ref>PMID:24958855</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Ion channels|Ion channels]] | + | *[[Ion channels 3D structures|Ion channels 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Arcfl]] | + | [[Category: Archaeoglobus fulgidus]] |
| - | [[Category: Andrade, S L.A]] | + | [[Category: Large Structures]] |
| - | [[Category: Dickmanns, A]] | + | [[Category: Andrade SLA]] |
| - | [[Category: Einsle, O]] | + | [[Category: Dickmanns A]] |
| - | [[Category: Ficner, R]] | + | [[Category: Einsle O]] |
| - | [[Category: Membrane protein]]
| + | [[Category: Ficner R]] |
| - | [[Category: Transport protein]]
| + | |
| - | [[Category: Transporter]]
| + | |
| Structural highlights
Function
AMT1_ARCFU Involved in the uptake of ammonium/ammonia (NH(4)(+)/NH(3)) (PubMed:22804733, PubMed:24958855). Transport is electrogenic (PubMed:22804733, PubMed:24958855). Transport the ammonium and methylammonium cation with high specificity (PubMed:24958855).[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Ammonium transporters (Amts) are integral membrane proteins found in all kingdoms of life that fulfill an essential function in the uptake of reduced nitrogen for biosynthetic purposes. Amt-1 is one of three Amts encoded in the genome of the hyperthermophilic archaeon Archaeoglobus fulgidus. The crystal structure of Amt-1 shows a compact trimer with 11 transmembrane helices per monomer and a central channel for substrate conduction in each monomer, similar to the known crystal structure of AmtB from Escherichia coli. Xenon derivatization has been used to identify apolar regions of Amt-1, emphasizing not only the hydrophobicity of the substrate channel but also the unexpected presence of extensive internal cavities that should be detrimental for protein stability. The substrates ammonium and methylammonium have been used for cocrystallization experiments with Amt-1, but the identification of binding sites that are distinct from water positions is not unambiguous. The well ordered cytoplasmic C terminus of the protein in the Amt-1 structure has allowed for the construction of a docking model between Amt-1 and a homology model for its physiological interaction partner, the P(II) protein GlnB-1. In this model, GlnB-1 binds tightly to the cytoplasmic face of the transporter, effectively blocking conduction through the three individual substrate channels.
Crystal structure of the archaeal ammonium transporter Amt-1 from Archaeoglobus fulgidus.,Andrade SL, Dickmanns A, Ficner R, Einsle O Proc Natl Acad Sci U S A. 2005 Oct 18;102(42):14994-9. Epub 2005 Oct 7. PMID:16214888[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Ullmann RT, Andrade SL, Ullmann GM. Thermodynamics of transport through the ammonium transporter Amt-1 investigated with free energy calculations. J Phys Chem B. 2012 Aug 16;116(32):9690-703. PMID:22804733 doi:10.1021/jp305440f
- ↑ Wacker T, Garcia-Celma JJ, Lewe P, Andrade SL. Direct observation of electrogenic NH4(+) transport in ammonium transport (Amt) proteins. Proc Natl Acad Sci U S A. 2014 Jul 8;111(27):9995-10000. PMID:24958855 doi:10.1073/pnas.1406409111
- ↑ Andrade SL, Dickmanns A, Ficner R, Einsle O. Crystal structure of the archaeal ammonium transporter Amt-1 from Archaeoglobus fulgidus. Proc Natl Acad Sci U S A. 2005 Oct 18;102(42):14994-9. Epub 2005 Oct 7. PMID:16214888
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