1xdg: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1xdg]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XDG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1XDG FirstGlance]. <br> | <table><tr><td colspan='2'>[[1xdg]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1XDG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1XDG FirstGlance]. <br> | ||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AB8:(1S,3R,8AS)-8-(2-{(4S,6S)-3-(4-HYDROXY-3-METHOXYBENZYL)-4-[2-(METHYLAMINO)-2-OXOETHYL]-2-OXO-1,3-OXAZINAN-6-YL}ETHYL)-3,7-DIMETHYL-1,2,3,7,8,8A-HEXAHYDRONAPHTHALEN-1-YL+(2R)-2-METHYLBUTANOATE'>AB8</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>< | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=AB8:(1S,3R,8AS)-8-(2-{(4S,6S)-3-(4-HYDROXY-3-METHOXYBENZYL)-4-[2-(METHYLAMINO)-2-OXOETHYL]-2-OXO-1,3-OXAZINAN-6-YL}ETHYL)-3,7-DIMETHYL-1,2,3,7,8,8A-HEXAHYDRONAPHTHALEN-1-YL+(2R)-2-METHYLBUTANOATE'>AB8</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr> | ||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1xdd|1xdd]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1xdd|1xdd]]</td></tr> | ||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1xdg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xdg OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1xdg RCSB], [http://www.ebi.ac.uk/pdbsum/1xdg PDBsum]</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=1xdg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xdg OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1xdg RCSB], [http://www.ebi.ac.uk/pdbsum/1xdg PDBsum]</span></td></tr> | ||
<table> | </table> | ||
== Function == | |||
[[http://www.uniprot.org/uniprot/ITAL_HUMAN ITAL_HUMAN]] Integrin alpha-L/beta-2 is a receptor for ICAM1, ICAM2, ICAM3 and ICAM4. It is involved in a variety of immune phenomena including leukocyte-endothelial cell interaction, cytotoxic T-cell mediated killing, and antibody dependent killing by granulocytes and monocytes. | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Dawson, J | [[Category: Dawson, J]] | ||
[[Category: Kallen, J | [[Category: Kallen, J]] | ||
[[Category: Weitz-Schmidt, G | [[Category: Weitz-Schmidt, G]] | ||
[[Category: Welzenbach, K | [[Category: Welzenbach, K]] | ||
[[Category: I-domain]] | [[Category: I-domain]] | ||
[[Category: Immune system]] | [[Category: Immune system]] | ||
[[Category: Rossman-fold]] | [[Category: Rossman-fold]] | ||
Revision as of 08:10, 25 December 2014
X-ray structure of LFA-1 I-domain in complex with LFA878 at 2.1A resolutionX-ray structure of LFA-1 I-domain in complex with LFA878 at 2.1A resolution
Structural highlights
Function[ITAL_HUMAN] Integrin alpha-L/beta-2 is a receptor for ICAM1, ICAM2, ICAM3 and ICAM4. It is involved in a variety of immune phenomena including leukocyte-endothelial cell interaction, cytotoxic T-cell mediated killing, and antibody dependent killing by granulocytes and monocytes. 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 PubMedThe integrin lymphocyte function-associated antigen-1 (LFA-1) (alphaLbeta2; CD11a/CD18) plays an important role in leukocyte migration and T cell activation. LFA-1 is inhibited by the cholesterol-lowering drug lovastatin, which binds to an allosteric site of the alphaL I domain termed the lovastatin site (L-site). Here we report for the first time the x-ray structures of the LFA-1 I domain complexed with derivatives of lovastatin optimized for LFA-1 inhibition. This analysis identified two new subpockets within the L-site occupied by chemical groups of the statin derivatives but not by lovastatin itself. Occupancy of these L-site subpockets led to distinct conformational changes in LFA-1, which were detectable by an epitope-monitoring assay. We utilized this assay to demonstrate improved LFA-1 inhibition in human blood in vitro and in blood samples from treated animals ex vivo. Moreover, we demonstrate that the novel lovastatin-derived LFA-1 inhibitor LFA878 exhibits potent anti-inflammatory effects in carrageenan-induced rat paw edema. In summary, the findings reported here extend the understanding of LFA-1 inhibition at the molecular level, allow for the identification and design of LFA-1 inhibitors of further enhanced potency, and support the expectation that LFA-1 inhibitors binding to the L-site will be of therapeutic value in treating inflammatory diseases. Improved lymphocyte function-associated antigen-1 (LFA-1) inhibition by statin derivatives: molecular basis determined by x-ray analysis and monitoring of LFA-1 conformational changes in vitro and ex vivo.,Weitz-Schmidt G, Welzenbach K, Dawson J, Kallen J J Biol Chem. 2004 Nov 5;279(45):46764-71. Epub 2004 Aug 10. PMID:15304496[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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