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| | ==Crystal structure of the complex of murine gamma-herpesvirus 68 Bcl-2 homolog M11 and a Beclin 1 BH3 domain-derived peptide== | | ==Crystal structure of the complex of murine gamma-herpesvirus 68 Bcl-2 homolog M11 and a Beclin 1 BH3 domain-derived peptide== |
| - | <StructureSection load='4mi8' size='340' side='right' caption='[[4mi8]], [[Resolution|resolution]] 2.10Å' scene=''> | + | <StructureSection load='4mi8' size='340' side='right'caption='[[4mi8]], [[Resolution|resolution]] 2.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4mi8]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Mhv68 Mhv68]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MI8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4MI8 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4mi8]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Murid_gammaherpesvirus_4 Murid gammaherpesvirus 4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MI8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MI8 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3dvu|3dvu]]</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=4mi8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mi8 OCA], [https://pdbe.org/4mi8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4mi8 RCSB], [https://www.ebi.ac.uk/pdbsum/4mi8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4mi8 ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GAMMAHV.M11, M11, v-bcl-2, v-bcl-2 GAMMAHV.M11 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=33708 MHV68])</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=4mi8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mi8 OCA], [http://pdbe.org/4mi8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4mi8 RCSB], [http://www.ebi.ac.uk/pdbsum/4mi8 PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/BECN1_HUMAN BECN1_HUMAN]] Plays a central role in autophagy. Required for the abcission step in cytokinesis. May play a role in antiviral host defense. Protects against infection by a neurovirulent strain of Sindbis virus.<ref>PMID:20208530</ref> | + | [https://www.uniprot.org/uniprot/ARBH_MHV68 ARBH_MHV68] Plays a role in the protection against apoptosis mediated by cytotoxic cells during the immune response to acute and persistent viral infection. Contributes therefore to latency establishment. Plays also a role in the inhibition of host starvation-induced autophagy which ultimately contributes to the viral chronic infection.<ref>PMID:10573168</ref> <ref>PMID:11205127</ref> <ref>PMID:15604429</ref> <ref>PMID:18248095</ref> <ref>PMID:18797192</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </div> | | </div> |
| | <div class="pdbe-citations 4mi8" style="background-color:#fffaf0;"></div> | | <div class="pdbe-citations 4mi8" style="background-color:#fffaf0;"></div> |
| | + | |
| | + | ==See Also== |
| | + | *[[B-cell lymphoma proteins 3D structures|B-cell lymphoma proteins 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Mhv68]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Mei, Y]] | + | [[Category: Large Structures]] |
| - | [[Category: Sinha, S]] | + | [[Category: Murid gammaherpesvirus 4]] |
| - | [[Category: Su, M]] | + | [[Category: Mei Y]] |
| - | [[Category: Anti-apoptotic and anti-autophagic activity]] | + | [[Category: Sinha S]] |
| - | [[Category: Bcl-2 family]] | + | [[Category: Su M]] |
| - | [[Category: Bh3d]]
| + | |
| - | [[Category: Viral protein-apoptosis complex]]
| + | |
| Structural highlights
Function
ARBH_MHV68 Plays a role in the protection against apoptosis mediated by cytotoxic cells during the immune response to acute and persistent viral infection. Contributes therefore to latency establishment. Plays also a role in the inhibition of host starvation-induced autophagy which ultimately contributes to the viral chronic infection.[1] [2] [3] [4] [5]
Publication Abstract from PubMed
gamma-herpesviruses (gammaHVs) are common human pathogens that encode homologs of the anti-apoptotic cellular Bcl-2 proteins, which are critical to viral reactivation and oncogenic transformation. The murine gammaHV68 provides a tractable in vivo model for understanding general features of these important human pathogens. Bcl-XL, a cellular Bcl-2 homolog, and the murine gammaHV68 Bcl-2 homolog, M11, both bind to a BH3 domain within the key autophagy effector Beclin 1 with comparable affinities, resulting in the down-regulation of Beclin 1-mediated autophagy. Despite this similarity, differences in residues lining the binding site of M11 and Bcl-XL dictate varying affinities for the different BH3 domain-containing proteins. Here we delineate Beclin 1 differential specificity determinants for binding to M11 or Bcl-XL by quantifying autophagy levels in cells expressing different Beclin 1 mutants and either M11 or Bcl-XL, and we show that a G120E/D121A Beclin 1 mutant selectively prevents down-regulation of Beclin 1-mediated autophagy by Bcl-XL, but not by M11. We use isothermal titration calorimetry to identify a Beclin 1 BH3 domain-derived peptide that selectively binds to M11, but not to Bcl-XL. The x-ray crystal structure of this peptide bound to M11 reveals the mechanism by which the M11 BH3 domain-binding groove accommodates this M11-specific peptide. This information was used to develop a cell-permeable peptide inhibitor that selectively inhibits M11-mediated, but not Bcl-XL-mediated, down-regulation of autophagy.
Targeting gamma-herpesvirus 68 Bcl-2-mediated down-regulation of autophagy.,Su M, Mei Y, Sanishvili R, Levine B, Colbert CL, Sinha S J Biol Chem. 2014 Mar 21;289(12):8029-40. doi: 10.1074/jbc.M113.515361. Epub 2014, Jan 17. PMID:24443581[6]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Wang GH, Garvey TL, Cohen JI. The murine gammaherpesvirus-68 M11 protein inhibits Fas- and TNF-induced apoptosis. J Gen Virol. 1999 Oct;80 ( Pt 10):2737-2740. doi: 10.1099/0022-1317-80-10-2737. PMID:10573168 doi:http://dx.doi.org/10.1099/0022-1317-80-10-2737
- ↑ Roy DJ, Ebrahimi BC, Dutia BM, Nash AA, Stewart JP. Murine gammaherpesvirus M11 gene product inhibits apoptosis and is expressed during virus persistence. Arch Virol. 2000;145(11):2411-20. doi: 10.1007/s007050070030. PMID:11205127 doi:http://dx.doi.org/10.1007/s007050070030
- ↑ de Lima BD, May JS, Marques S, Simas JP, Stevenson PG. Murine gammaherpesvirus 68 bcl-2 homologue contributes to latency establishment in vivo. J Gen Virol. 2005 Jan;86(Pt 1):31-40. doi: 10.1099/vir.0.80480-0. PMID:15604429 doi:http://dx.doi.org/10.1099/vir.0.80480-0
- ↑ Ku B, Woo JS, Liang C, Lee KH, Hong HS, E X, Kim KS, Jung JU, Oh BH. Structural and Biochemical Bases for the Inhibition of Autophagy and Apoptosis by Viral BCL-2 of Murine gamma-Herpesvirus 68. PLoS Pathog. 2008 Feb 1;4(2):e25. PMID:18248095 doi:07-PLPA-RA-0558
- ↑ Sinha S, Colbert CL, Becker N, Wei Y, Levine B. Molecular basis of the regulation of Beclin 1-dependent autophagy by the gamma-herpesvirus 68 Bcl-2 homolog M11. Autophagy. 2008 Nov 18;4(8). PMID:18797192
- ↑ Su M, Mei Y, Sanishvili R, Levine B, Colbert CL, Sinha S. Targeting gamma-herpesvirus 68 Bcl-2-mediated down-regulation of autophagy. J Biol Chem. 2014 Mar 21;289(12):8029-40. doi: 10.1074/jbc.M113.515361. Epub 2014, Jan 17. PMID:24443581 doi:http://dx.doi.org/10.1074/jbc.M113.515361
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