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| | <StructureSection load='5iji' size='340' side='right'caption='[[5iji]], [[Resolution|resolution]] 1.94Å' scene=''> | | <StructureSection load='5iji' size='340' side='right'caption='[[5iji]], [[Resolution|resolution]] 1.94Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5iji]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5IJI OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5IJI FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5iji]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5IJI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5IJI FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LFA:EICOSANE'>LFA</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</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]] 1.94Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Histidine_kinase Histidine kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.13.3 2.7.13.3] </span></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=LFA:EICOSANE'>LFA</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5iji FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5iji OCA], [http://pdbe.org/5iji PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5iji RCSB], [http://www.ebi.ac.uk/pdbsum/5iji PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5iji ProSAT]</span></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=5iji FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5iji OCA], [https://pdbe.org/5iji PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5iji RCSB], [https://www.ebi.ac.uk/pdbsum/5iji PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5iji ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/NARQ_ECOLI NARQ_ECOLI]] Acts as a sensor for nitrate/nitrite and transduces signal of nitrate/nitrite availability to the NarL/NarP proteins. NarQ probably activates NarL and NarP by phosphorylation. NarQ probably negatively regulates the NarL protein by dephosphorylation. | + | [https://www.uniprot.org/uniprot/NARQ_ECOLI NARQ_ECOLI] Acts as a sensor for nitrate/nitrite and transduces signal of nitrate/nitrite availability to the NarL/NarP proteins. NarQ probably activates NarL and NarP by phosphorylation. NarQ probably negatively regulates the NarL protein by dephosphorylation. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Histidine kinase]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Gordeliy, V]] | + | [[Category: Gordeliy V]] |
| - | [[Category: Gushchin, I]] | + | [[Category: Gushchin I]] |
| - | [[Category: Ishchenko, A]] | + | [[Category: Ishchenko A]] |
| - | [[Category: Melnikov, I]] | + | [[Category: Melnikov I]] |
| - | [[Category: Polovinkin, V]] | + | [[Category: Polovinkin V]] |
| - | [[Category: Popov, A]] | + | [[Category: Popov A]] |
| - | [[Category: Membrane protein]]
| + | |
| - | [[Category: Nitrate]]
| + | |
| - | [[Category: Sensor]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
NARQ_ECOLI Acts as a sensor for nitrate/nitrite and transduces signal of nitrate/nitrite availability to the NarL/NarP proteins. NarQ probably activates NarL and NarP by phosphorylation. NarQ probably negatively regulates the NarL protein by dephosphorylation.
Publication Abstract from PubMed
One of the major and essential classes of transmembrane (TM) receptors, present in all domains of life, is sensor histidine kinases, parts of two-component signaling systems (TCSs). The structural mechanisms of TM signaling by these sensors are poorly understood. We present crystal structures of the periplasmic sensor domain, the TM domain, and the cytoplasmic HAMP domain of the Escherichia coli nitrate/nitrite sensor histidine kinase NarQ in the ligand-bound and mutated ligand-free states. The structures reveal that the ligand binding induces rearrangements and pistonlike shifts of TM helices. The HAMP domain protomers undergo leverlike motions and convert these pistonlike motions into helical rotations. Our findings provide the structural framework for complete understanding of TM TCS signaling and for development of antimicrobial treatments targeting TCSs.
Mechanism of transmembrane signaling by sensor histidine kinases.,Gushchin I, Melnikov I, Polovinkin V, Ishchenko A, Yuzhakova A, Buslaev P, Bourenkov G, Grudinin S, Round E, Balandin T, Borshchevskiy V, Willbold D, Leonard G, Buldt G, Popov A, Gordeliy V Science. 2017 Jun 9;356(6342). pii: eaah6345. doi: 10.1126/science.aah6345. Epub , 2017 May 18. PMID:28522691[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Gushchin I, Melnikov I, Polovinkin V, Ishchenko A, Yuzhakova A, Buslaev P, Bourenkov G, Grudinin S, Round E, Balandin T, Borshchevskiy V, Willbold D, Leonard G, Buldt G, Popov A, Gordeliy V. Mechanism of transmembrane signaling by sensor histidine kinases. Science. 2017 Jun 9;356(6342). pii: eaah6345. doi: 10.1126/science.aah6345. Epub , 2017 May 18. PMID:28522691 doi:http://dx.doi.org/10.1126/science.aah6345
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