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| | <StructureSection load='1sx6' size='340' side='right'caption='[[1sx6]], [[Resolution|resolution]] 1.95Å' scene=''> | | <StructureSection load='1sx6' size='340' side='right'caption='[[1sx6]], [[Resolution|resolution]] 1.95Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1sx6]] 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=1SX6 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1SX6 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1sx6]] 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=1SX6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SX6 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=OCT:N-OCTANE'>OCT</scene>, <scene name='pdbligand=OLA:OLEIC+ACID'>OLA</scene>, <scene name='pdbligand=SPH:SPHINGOSINE'>SPH</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</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]] 1.95Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1swx|1swx]]</div></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BGC:BETA-D-GLUCOSE'>BGC</scene>, <scene name='pdbligand=GAL:BETA-D-GALACTOSE'>GAL</scene>, <scene name='pdbligand=OCT:N-OCTANE'>OCT</scene>, <scene name='pdbligand=OLA:OLEIC+ACID'>OLA</scene>, <scene name='pdbligand=PRD_900004:beta-lactose'>PRD_900004</scene>, <scene name='pdbligand=SPH:SPHINGOSINE'>SPH</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GLTP ([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=1sx6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sx6 OCA], [https://pdbe.org/1sx6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1sx6 RCSB], [https://www.ebi.ac.uk/pdbsum/1sx6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1sx6 ProSAT]</span></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=1sx6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1sx6 OCA], [http://pdbe.org/1sx6 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1sx6 RCSB], [http://www.ebi.ac.uk/pdbsum/1sx6 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1sx6 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GLTP_HUMAN GLTP_HUMAN]] Accelerates the intermembrane transfer of various glycolipids. Catalyzes the transfer of various glycosphingolipids between membranes but does not catalyze the transfer of phospholipids. May be involved in the intracellular translocation of glucosylceramides.<ref>PMID:18261224</ref> <ref>PMID:15504043</ref> <ref>PMID:17980653</ref> <ref>PMID:15329726</ref> | + | [https://www.uniprot.org/uniprot/GLTP_HUMAN GLTP_HUMAN] Accelerates the intermembrane transfer of various glycolipids. Catalyzes the transfer of various glycosphingolipids between membranes but does not catalyze the transfer of phospholipids. May be involved in the intracellular translocation of glucosylceramides.<ref>PMID:18261224</ref> <ref>PMID:15504043</ref> <ref>PMID:17980653</ref> <ref>PMID:15329726</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Brown, R E]] | + | [[Category: Brown RE]] |
| - | [[Category: Malakhova, M L]] | + | [[Category: Malakhova ML]] |
| - | [[Category: Malinina, L]] | + | [[Category: Malinina L]] |
| - | [[Category: Patel, D J]] | + | [[Category: Patel DJ]] |
| - | [[Category: Teplov, A]] | + | [[Category: Teplov A]] |
| - | [[Category: Glycosphingolipid transfer protein-lactosylceramide complex]]
| + | |
| - | [[Category: Lipid transport]]
| + | |
| Structural highlights
1sx6 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Method: | X-ray diffraction, Resolution 1.95Å |
| Ligands: | , , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
GLTP_HUMAN Accelerates the intermembrane transfer of various glycolipids. Catalyzes the transfer of various glycosphingolipids between membranes but does not catalyze the transfer of phospholipids. May be involved in the intracellular translocation of glucosylceramides.[1] [2] [3] [4]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Lipid transfer proteins are important in membrane vesicle biogenesis and trafficking, signal transduction and immunological presentation processes. The conserved and ubiquitous mammalian glycolipid transfer proteins (GLTPs) serve as potential regulators of cell processes mediated by glycosphingolipids, ranging from differentiation and proliferation to invasive adhesion, neurodegeneration and apoptosis. Here we report crystal structures of apo-GLTP (1.65 A resolution) and lactosylceramide-bound (1.95 A) GLTP, in which the bound glycosphingolipid is sandwiched, after adaptive recognition, within a previously unknown two-layer all-alpha-helical topology. Glycosphingolipid binding specificity is achieved through recognition and anchoring of the sugar-amide headgroup to the GLTP recognition centre by hydrogen bond networks and hydrophobic contacts, and encapsulation of both lipid chains, in a precisely oriented manner within a 'moulded-to-fit' hydrophobic tunnel. A cleft-like conformational gating mechanism, involving two interhelical loops and one alpha-helix of GLTP, could enable the glycolipid chains to enter and leave the tunnel in the membrane-associated state. Mutation and functional analyses of residues in the glycolipid recognition centre and within the hydrophobic tunnel support a framework for understanding how GLTPs acquire and release glycosphingolipids during lipid intermembrane transfer and presentation processes.
Structural basis for glycosphingolipid transfer specificity.,Malinina L, Malakhova ML, Teplov A, Brown RE, Patel DJ Nature. 2004 Aug 26;430(7003):1048-53. PMID:15329726[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Zou X, Chung T, Lin X, Malakhova ML, Pike HM, Brown RE. Human glycolipid transfer protein (GLTP) genes: organization, transcriptional status and evolution. BMC Genomics. 2008 Feb 8;9:72. PMID:18261224 doi:1471-2164-9-72
- ↑ Rao CS, Lin X, Pike HM, Molotkovsky JG, Brown RE. Glycolipid transfer protein mediated transfer of glycosphingolipids between membranes: a model for action based on kinetic and thermodynamic analyses. Biochemistry. 2004 Nov 2;43(43):13805-15. PMID:15504043 doi:10.1021/bi0492197
- ↑ Tuuf J, Mattjus P. Human glycolipid transfer protein--intracellular localization and effects on the sphingolipid synthesis. Biochim Biophys Acta. 2007 Nov;1771(11):1353-63. Epub 2007 Sep 21. PMID:17980653 doi:S1388-1981(07)00196-5
- ↑ Malinina L, Malakhova ML, Teplov A, Brown RE, Patel DJ. Structural basis for glycosphingolipid transfer specificity. Nature. 2004 Aug 26;430(7003):1048-53. PMID:15329726 doi:10.1038/nature02856
- ↑ Malinina L, Malakhova ML, Teplov A, Brown RE, Patel DJ. Structural basis for glycosphingolipid transfer specificity. Nature. 2004 Aug 26;430(7003):1048-53. PMID:15329726 doi:10.1038/nature02856
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