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| | ==An engineered Axl 'decoy receptor' effectively silences the Gas6-Axl signaling axis== | | ==An engineered Axl 'decoy receptor' effectively silences the Gas6-Axl signaling axis== |
| - | <StructureSection load='4ra0' size='340' side='right' caption='[[4ra0]], [[Resolution|resolution]] 3.07Å' scene=''> | + | <StructureSection load='4ra0' size='340' side='right'caption='[[4ra0]], [[Resolution|resolution]] 3.07Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4ra0]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RA0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4RA0 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4ra0]] is a 4 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=4RA0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4RA0 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</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]] 3.07Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Receptor_protein-tyrosine_kinase Receptor protein-tyrosine kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.10.1 2.7.10.1] </span></td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=4ra0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ra0 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ra0 RCSB], [http://www.ebi.ac.uk/pdbsum/4ra0 PDBsum]</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=4ra0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ra0 OCA], [https://pdbe.org/4ra0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ra0 RCSB], [https://www.ebi.ac.uk/pdbsum/4ra0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ra0 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| - | == Disease == | |
| - | [[http://www.uniprot.org/uniprot/UFO_HUMAN UFO_HUMAN]] Note=AXL and its ligand GAS6 are highly expressed in thyroid carcinoma tissues, and might thus be involved in thyroid tumorigenesis. Overexpression of AXL and its ligand was also detected in many other cancers such as myeloproliferative disorders, prostatic carcinoma cells, or breast cancer. | |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/GAS6_HUMAN GAS6_HUMAN]] Ligand for tyrosine-protein kinase receptors AXL, TYRO3 and MER whose signaling is implicated in cell growth and survival, cell adhesion and cell migration. GAS6/AXL signaling plays a role in various processes such as endothelial cell survival during acidification by preventing apoptosis, optimal cytokine signaling during human natural killer cell development, hepatic regeneration, gonadotropin-releasing hormone neuron survival and migration, platelet activation, or regulation of thrombotic responses.<ref>PMID:12364394</ref> <ref>PMID:18840707</ref> [[http://www.uniprot.org/uniprot/UFO_HUMAN UFO_HUMAN]] Receptor tyrosine kinase that transduces signals from the extracellular matrix into the cytoplasm by binding growth factor GAS6 and which is thus regulating many physiological processes including cell survival, cell proliferation, migration and differentiation. Ligand binding at the cell surface induces dimerization and autophosphorylation of AXL. Following activation by ligand, ALX binds and induces tyrosine phosphorylation of PI3-kinase subunits PIK3R1, PIK3R2 and PIK3R3; but also GRB2, PLCG1, LCK and PTPN11. Other downstream substrate candidates for AXL are CBL, NCK2, SOCS1 and TENC1. Recruitment of GRB2 and phosphatidylinositol 3 kinase regulatory subunits by AXL leads to the downstream activation of the AKT kinase. GAS6/AXL signaling plays a role in various processes such as endothelial cell survival during acidification by preventing apoptosis, optimal cytokine signaling during human natural killer cell development, hepatic regeneration, gonadotropin-releasing hormone neuron survival and migration, platelet activation, or regulation of thrombotic responses. Plays also an important role in inhibition of Toll-like receptors (TLRs)-mediated innate immune response. In case of filovirus infection, seems to function as a cell entry factor.<ref>PMID:1656220</ref> <ref>PMID:10403904</ref> <ref>PMID:11484958</ref> <ref>PMID:12364394</ref> <ref>PMID:12490074</ref> <ref>PMID:15507525</ref> <ref>PMID:15733062</ref> <ref>PMID:17005688</ref> <ref>PMID:18840707</ref> | + | [https://www.uniprot.org/uniprot/GAS6_HUMAN GAS6_HUMAN] Ligand for tyrosine-protein kinase receptors AXL, TYRO3 and MER whose signaling is implicated in cell growth and survival, cell adhesion and cell migration. GAS6/AXL signaling plays a role in various processes such as endothelial cell survival during acidification by preventing apoptosis, optimal cytokine signaling during human natural killer cell development, hepatic regeneration, gonadotropin-releasing hormone neuron survival and migration, platelet activation, or regulation of thrombotic responses.<ref>PMID:12364394</ref> <ref>PMID:18840707</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 4ra0" style="background-color:#fffaf0;"></div> |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Receptor protein-tyrosine kinase]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Cochran, J R.]] | + | [[Category: Large Structures]] |
| - | [[Category: Kapur, S.]] | + | [[Category: Cochran JR]] |
| - | [[Category: Kariolis, M S.]] | + | [[Category: Kapur S]] |
| - | [[Category: Mathews, I I.]] | + | [[Category: Kariolis MS]] |
| - | [[Category: Axl]] | + | [[Category: Mathews II]] |
| - | [[Category: Cancer]]
| + | |
| - | [[Category: Gas6]]
| + | |
| - | [[Category: Metastasis]]
| + | |
| - | [[Category: Signaling protein]]
| + | |
| Structural highlights
4ra0 is a 4 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 3.07Å |
| Ligands: | , , , , |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
GAS6_HUMAN Ligand for tyrosine-protein kinase receptors AXL, TYRO3 and MER whose signaling is implicated in cell growth and survival, cell adhesion and cell migration. GAS6/AXL signaling plays a role in various processes such as endothelial cell survival during acidification by preventing apoptosis, optimal cytokine signaling during human natural killer cell development, hepatic regeneration, gonadotropin-releasing hormone neuron survival and migration, platelet activation, or regulation of thrombotic responses.[1] [2]
Publication Abstract from PubMed
Aberrant signaling through the Axl receptor tyrosine kinase has been associated with a myriad of human diseases, most notably metastatic cancer, identifying Axl and its ligand Gas6 as important therapeutic targets. Using rational and combinatorial approaches, we engineered an Axl 'decoy receptor' that binds Gas6 with high affinity and inhibits its function, offering an alternative approach from drug discovery efforts that directly target Axl. Four mutations within this high-affinity Axl variant caused structural alterations in side chains across the Gas6-Axl binding interface, stabilizing a conformational change on Gas6. When reformatted as an Fc fusion, the engineered decoy receptor bound Gas6 with femtomolar affinity, an 80-fold improvement compared to binding of the wild-type Axl receptor, allowing effective sequestration of Gas6 and specific abrogation of Axl signaling. Moreover, increased Gas6 binding affinity was critical and correlative with the ability of decoy receptors to potently inhibit metastasis and disease progression in vivo.
An engineered Axl 'decoy receptor' effectively silences the Gas6-Axl signaling axis.,Kariolis MS, Miao YR, Jones DS 2nd, Kapur S, Mathews II, Giaccia AJ, Cochran JR Nat Chem Biol. 2014 Nov;10(11):977-83. doi: 10.1038/nchembio.1636. Epub 2014 Sep , 21. PMID:25242553[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ D'Arcangelo D, Gaetano C, Capogrossi MC. Acidification prevents endothelial cell apoptosis by Axl activation. Circ Res. 2002 Oct 4;91(7):e4-12. PMID:12364394
- ↑ Park IK, Giovenzana C, Hughes TL, Yu J, Trotta R, Caligiuri MA. The Axl/Gas6 pathway is required for optimal cytokine signaling during human natural killer cell development. Blood. 2009 Mar 12;113(11):2470-7. doi: 10.1182/blood-2008-05-157073. Epub 2008, Oct 7. PMID:18840707 doi:10.1182/blood-2008-05-157073
- ↑ Kariolis MS, Miao YR, Jones DS 2nd, Kapur S, Mathews II, Giaccia AJ, Cochran JR. An engineered Axl 'decoy receptor' effectively silences the Gas6-Axl signaling axis. Nat Chem Biol. 2014 Nov;10(11):977-83. doi: 10.1038/nchembio.1636. Epub 2014 Sep , 21. PMID:25242553 doi:http://dx.doi.org/10.1038/nchembio.1636
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