|
|
| Line 3: |
Line 3: |
| | <StructureSection load='6qv2' size='340' side='right'caption='[[6qv2]], [[Resolution|resolution]] 4.23Å' scene=''> | | <StructureSection load='6qv2' size='340' side='right'caption='[[6qv2]], [[Resolution|resolution]] 4.23Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6qv2]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Alpaca Alpaca] and [http://en.wikipedia.org/wiki/Thema Thema]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6QV2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6QV2 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6qv2]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima_MSB8 Thermotoga maritima MSB8] and [https://en.wikipedia.org/wiki/Vicugna_pacos Vicugna pacos]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6QV2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6QV2 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AGS:PHOSPHOTHIOPHOSPHORIC+ACID-ADENYLATE+ESTER'>AGS</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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]] 4.23Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TM_0287 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=243274 THEMA]), TM_0288 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=243274 THEMA])</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AGS:PHOSPHOTHIOPHOSPHORIC+ACID-ADENYLATE+ESTER'>AGS</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=6qv2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qv2 OCA], [http://pdbe.org/6qv2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6qv2 RCSB], [http://www.ebi.ac.uk/pdbsum/6qv2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6qv2 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=6qv2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qv2 OCA], [https://pdbe.org/6qv2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6qv2 RCSB], [https://www.ebi.ac.uk/pdbsum/6qv2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6qv2 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| Line 21: |
Line 21: |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Alpaca]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Thema]] | + | [[Category: Thermotoga maritima MSB8]] |
| - | [[Category: Egloff, P]] | + | [[Category: Vicugna pacos]] |
| - | [[Category: Huerlimann, L M]] | + | [[Category: Egloff P]] |
| - | [[Category: Hutter, C A.J]] | + | [[Category: Huerlimann LM]] |
| - | [[Category: Seeger, M A]] | + | [[Category: Hutter CAJ]] |
| - | [[Category: Zimmermann, I]] | + | [[Category: Seeger MA]] |
| - | [[Category: Abc exporter]]
| + | [[Category: Zimmermann I]] |
| - | [[Category: Abc transporter]]
| + | |
| - | [[Category: Membrane protein]]
| + | |
| - | [[Category: Membrane transporter]]
| + | |
| - | [[Category: Nanobody]]
| + | |
| Structural highlights
Publication Abstract from PubMed
ABC exporters harness the energy of ATP to pump substrates across membranes. Extracellular gate opening and closure are key steps of the transport cycle, but the underlying mechanism is poorly understood. Here, we generated a synthetic single domain antibody (sybody) that recognizes the heterodimeric ABC exporter TM287/288 exclusively in the presence of ATP, which was essential to solve a 3.2 A crystal structure of the outward-facing transporter. The sybody binds to an extracellular wing and strongly inhibits ATPase activity by shifting the transporter's conformational equilibrium towards the outward-facing state, as shown by double electron-electron resonance (DEER). Mutations that facilitate extracellular gate opening result in a comparable equilibrium shift and strongly reduce ATPase activity and drug transport. Using the sybody as conformational probe, we demonstrate that efficient extracellular gate closure is required to dissociate the NBD dimer after ATP hydrolysis to reset the transporter back to its inward-facing state.
The extracellular gate shapes the energy profile of an ABC exporter.,Hutter CAJ, Timachi MH, Hurlimann LM, Zimmermann I, Egloff P, Goddeke H, Kucher S, Stefanic S, Karttunen M, Schafer LV, Bordignon E, Seeger MA Nat Commun. 2019 May 21;10(1):2260. doi: 10.1038/s41467-019-09892-6. PMID:31113958[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Hutter CAJ, Timachi MH, Hurlimann LM, Zimmermann I, Egloff P, Goddeke H, Kucher S, Stefanic S, Karttunen M, Schafer LV, Bordignon E, Seeger MA. The extracellular gate shapes the energy profile of an ABC exporter. Nat Commun. 2019 May 21;10(1):2260. doi: 10.1038/s41467-019-09892-6. PMID:31113958 doi:http://dx.doi.org/10.1038/s41467-019-09892-6
|
