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| | <StructureSection load='5c73' size='340' side='right'caption='[[5c73]], [[Resolution|resolution]] 5.90Å' scene=''> | | <StructureSection load='5c73' size='340' side='right'caption='[[5c73]], [[Resolution|resolution]] 5.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5c73]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/"campylobacter_fetus_subsp._jejuni"_smibert_1974 "campylobacter fetus subsp. jejuni" smibert 1974]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5C73 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5C73 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5c73]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Campylobacter_jejuni Campylobacter jejuni]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5C73 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5C73 FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">pglK, wlaB, Cj1130c ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=197 "Campylobacter fetus subsp. jejuni" Smibert 1974])</td></tr> | + | </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=5c73 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5c73 OCA], [https://pdbe.org/5c73 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5c73 RCSB], [https://www.ebi.ac.uk/pdbsum/5c73 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5c73 ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Lipopolysaccharide-transporting_ATPase Lipopolysaccharide-transporting ATPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.3.39 3.6.3.39] </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=5c73 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5c73 OCA], [http://pdbe.org/5c73 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5c73 RCSB], [http://www.ebi.ac.uk/pdbsum/5c73 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5c73 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/PGLK_CAMJE PGLK_CAMJE]] Mediates the translocation of the undecaprenylpyrophosphate-linked heptasaccharide intermediate into the periplasm during the N-linked protein glycosylation pathway.<ref>PMID:16498400</ref> <ref>PMID:16547029</ref> | + | [https://www.uniprot.org/uniprot/O86150_CAMJU O86150_CAMJU] |
| | <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: Campylobacter fetus subsp. jejuni smibert 1974]] | + | [[Category: Campylobacter jejuni]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Lipopolysaccharide-transporting ATPase]]
| + | [[Category: Locher KP]] |
| - | [[Category: Locher, K P]] | + | [[Category: Perez C]] |
| - | [[Category: Perez, C]] | + | |
| - | [[Category: Abc transporter flippase]]
| + | |
| - | [[Category: Transport protein]]
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| Structural highlights
Function
O86150_CAMJU
Publication Abstract from PubMed
The flipping of membrane-embedded lipids containing large, polar head groups is slow and energetically unfavourable, and is therefore catalysed by flippases, the mechanisms of which are unknown. A prominent example of a flipping reaction is the translocation of lipid-linked oligosaccharides that serve as donors in N-linked protein glycosylation. In Campylobacter jejuni, this process is catalysed by the ABC transporter PglK. Here we present a mechanism of PglK-catalysed lipid-linked oligosaccharide flipping based on crystal structures in distinct states, a newly devised in vitro flipping assay, and in vivo studies. PglK can adopt inward- and outward-facing conformations in vitro, but only outward-facing states are required for flipping. While the pyrophosphate-oligosaccharide head group of lipid-linked oligosaccharides enters the translocation cavity and interacts with positively charged side chains, the lipidic polyprenyl tail binds and activates the transporter but remains exposed to the lipid bilayer during the reaction. The proposed mechanism is distinct from the classical alternating-access model applied to other transporters.
Structure and mechanism of an active lipid-linked oligosaccharide flippase.,Perez C, Gerber S, Boilevin J, Bucher M, Darbre T, Aebi M, Reymond JL, Locher KP Nature. 2015 Aug 12. doi: 10.1038/nature14953. PMID:26266984[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Perez C, Gerber S, Boilevin J, Bucher M, Darbre T, Aebi M, Reymond JL, Locher KP. Structure and mechanism of an active lipid-linked oligosaccharide flippase. Nature. 2015 Aug 12. doi: 10.1038/nature14953. PMID:26266984 doi:http://dx.doi.org/10.1038/nature14953
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