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| | <StructureSection load='5u77' size='340' side='right'caption='[[5u77]], [[Resolution|resolution]] 2.16Å' scene=''> | | <StructureSection load='5u77' size='340' side='right'caption='[[5u77]], [[Resolution|resolution]] 2.16Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5u77]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5U77 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5U77 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5u77]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5U77 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5U77 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene>, <scene name='pdbligand=NDB:N-(2-HYDROXYETHYL)-N,N-DIMETHYL-3-SULFOPROPAN-1-AMINIUM'>NDB</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]] 2.157Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5u78|5u78]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene>, <scene name='pdbligand=NDB:N-(2-HYDROXYETHYL)-N,N-DIMETHYL-3-SULFOPROPAN-1-AMINIUM'>NDB</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">OSBPL8, KIAA1451, ORP8, OSBP10 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=5u77 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5u77 OCA], [https://pdbe.org/5u77 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5u77 RCSB], [https://www.ebi.ac.uk/pdbsum/5u77 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5u77 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=5u77 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5u77 OCA], [http://pdbe.org/5u77 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5u77 RCSB], [http://www.ebi.ac.uk/pdbsum/5u77 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5u77 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/OSBL8_HUMAN OSBL8_HUMAN] |
| | <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: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Ghai, R]] | + | [[Category: Ghai R]] |
| - | [[Category: Yang, H]] | + | [[Category: Yang H]] |
| - | [[Category: Lipid transport]]
| + | |
| - | [[Category: Membrane contact site]]
| + | |
| - | [[Category: Oxsyterol]]
| + | |
| - | [[Category: Phosphoinositide]]
| + | |
| Structural highlights
Function
OSBL8_HUMAN
Publication Abstract from PubMed
ORP5 and ORP8, members of the oxysterol-binding protein (OSBP)-related proteins (ORP) family, are endoplasmic reticulum membrane proteins implicated in lipid trafficking. ORP5 and ORP8 are reported to localize to endoplasmic reticulum-plasma membrane junctions via binding to phosphatidylinositol-4-phosphate (PtdIns(4)P), and act as a PtdIns(4)P/phosphatidylserine counter exchanger between the endoplasmic reticulum and plasma membrane. Here we provide evidence that the pleckstrin homology domain of ORP5/8 via PtdIns(4,5)P 2, and not PtdIns(4)P binding mediates the recruitment of ORP5/8 to endoplasmic reticulum-plasma membrane contact sites. The OSBP-related domain of ORP8 can extract and transport multiple phosphoinositides in vitro, and knocking down both ORP5 and ORP8 in cells increases the plasma membrane level of PtdIns(4,5)P 2 with little effect on PtdIns(4)P. Overall, our data show, for the first time, that phosphoinositides other than PtdIns(4)P can also serve as co-exchangers for the transport of cargo lipids by ORPs.ORP5/8 are endoplasmic reticulum (ER) membrane proteins implicated in lipid trafficking that localize to ER-plasma membrane (PM) contacts and maintain membrane homeostasis. Here the authors show that PtdIns(4,5)P 2 plays a critical role in the targeting and function of ORP5/8 at the PM.
ORP5 and ORP8 bind phosphatidylinositol-4, 5-biphosphate (PtdIns(4,5)P 2) and regulate its level at the plasma membrane.,Ghai R, Du X, Wang H, Dong J, Ferguson C, Brown AJ, Parton RG, Wu JW, Yang H Nat Commun. 2017 Oct 2;8(1):757. doi: 10.1038/s41467-017-00861-5. PMID:28970484[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Ghai R, Du X, Wang H, Dong J, Ferguson C, Brown AJ, Parton RG, Wu JW, Yang H. ORP5 and ORP8 bind phosphatidylinositol-4, 5-biphosphate (PtdIns(4,5)P 2) and regulate its level at the plasma membrane. Nat Commun. 2017 Oct 2;8(1):757. doi: 10.1038/s41467-017-00861-5. PMID:28970484 doi:http://dx.doi.org/10.1038/s41467-017-00861-5
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