4eq7: Difference between revisions
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[[ | ==Structure of Atu4243-GABA receptor== | ||
<StructureSection load='4eq7' size='340' side='right' caption='[[4eq7]], [[Resolution|resolution]] 1.91Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4eq7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Agrobacterium_fabrum_str._c58 Agrobacterium fabrum str. c58]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4EQ7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4EQ7 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | |||
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | |||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Atu4243 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=176299 Agrobacterium fabrum str. C58])</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=4eq7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4eq7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4eq7 RCSB], [http://www.ebi.ac.uk/pdbsum/4eq7 PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
GABA acts as an intercellular signal in eukaryotes and as an interspecies signal in host-microbe interactions. Structural characteristics of selective eukaryotic GABA receptors and bacterial GABA sensors are unknown. Here, we identified the selective GABA-binding protein, called Atu4243, in the plant pathogen Agrobacterium tumefaciens. A constructed atu4243 mutant was affected in GABA transport and in expression of the GABA-regulated functions, including aggressiveness on two plant hosts and degradation of the quorum-sensing signal. The GABA-bound Atu4243 structure at 1.28 A reveals that GABA adopts a conformation never observed so far and interacts with two key residues, Arg(203) and Asp(226) of which the role in GABA binding and GABA signalling in Agrobacterium has been validated using appropriate mutants. The conformational GABA-analogue trans-4-aminocrotonic acid (TACA) antagonizes GABA activity, suggesting structural similarities between the binding sites of the bacterial sensor Atu4243 and mammalian GABA(C) receptors. Exploration of genomic databases reveals Atu4243 orthologues in several pathogenic and symbiotic proteobacteria, such as Rhizobium, Azospirillum, Burkholderia and Pseudomonas. Thus, this study establishes a structural basis for selective GABA sensors and offers opportunities for deciphering the role of the GABA-mediated communication in several host-pathogen interactions. | |||
Structural basis for selective GABA binding in bacterial pathogens.,Planamente S, Mondy S, Hommais F, Vigouroux A, Morera S, Faure D Mol Microbiol. 2012 Oct 9. doi: 10.1111/mmi.12043. PMID:23043322<ref>PMID:23043322</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
== | __TOC__ | ||
</StructureSection> | |||
[[Category: Agrobacterium fabrum str. c58]] | [[Category: Agrobacterium fabrum str. c58]] | ||
[[Category: Morera, S | [[Category: Morera, S]] | ||
[[Category: Planamente, S | [[Category: Planamente, S]] | ||
[[Category: Class d of pbp]] | [[Category: Class d of pbp]] | ||
[[Category: Transport protein]] | [[Category: Transport protein]] | ||
Revision as of 20:55, 9 December 2014
Structure of Atu4243-GABA receptorStructure of Atu4243-GABA receptor
Structural highlights
Publication Abstract from PubMedGABA acts as an intercellular signal in eukaryotes and as an interspecies signal in host-microbe interactions. Structural characteristics of selective eukaryotic GABA receptors and bacterial GABA sensors are unknown. Here, we identified the selective GABA-binding protein, called Atu4243, in the plant pathogen Agrobacterium tumefaciens. A constructed atu4243 mutant was affected in GABA transport and in expression of the GABA-regulated functions, including aggressiveness on two plant hosts and degradation of the quorum-sensing signal. The GABA-bound Atu4243 structure at 1.28 A reveals that GABA adopts a conformation never observed so far and interacts with two key residues, Arg(203) and Asp(226) of which the role in GABA binding and GABA signalling in Agrobacterium has been validated using appropriate mutants. The conformational GABA-analogue trans-4-aminocrotonic acid (TACA) antagonizes GABA activity, suggesting structural similarities between the binding sites of the bacterial sensor Atu4243 and mammalian GABA(C) receptors. Exploration of genomic databases reveals Atu4243 orthologues in several pathogenic and symbiotic proteobacteria, such as Rhizobium, Azospirillum, Burkholderia and Pseudomonas. Thus, this study establishes a structural basis for selective GABA sensors and offers opportunities for deciphering the role of the GABA-mediated communication in several host-pathogen interactions. Structural basis for selective GABA binding in bacterial pathogens.,Planamente S, Mondy S, Hommais F, Vigouroux A, Morera S, Faure D Mol Microbiol. 2012 Oct 9. doi: 10.1111/mmi.12043. PMID:23043322[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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