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| | <StructureSection load='3x0f' size='340' side='right'caption='[[3x0f]], [[Resolution|resolution]] 1.47Å' scene=''> | | <StructureSection load='3x0f' size='340' side='right'caption='[[3x0f]], [[Resolution|resolution]] 1.47Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3x0f]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3X0F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3X0F FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3x0f]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3X0F OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3X0F FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</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]] 1.471Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1g8q|1g8q]], [[1iv5|1iv5]], [[3x0e|3x0e]], [[3x0g|3x0g]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Cd81, Tapa1 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr>
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| | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3x0f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3x0f OCA], [https://pdbe.org/3x0f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3x0f RCSB], [https://www.ebi.ac.uk/pdbsum/3x0f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3x0f ProSAT]</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=3x0f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3x0f OCA], [https://pdbe.org/3x0f PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3x0f RCSB], [https://www.ebi.ac.uk/pdbsum/3x0f PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3x0f ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/CD81_MOUSE CD81_MOUSE]] May play an important role in the regulation of lymphoma cell growth. May be involved in the acrosome reaction.<ref>PMID:17290409</ref>
| + | [https://www.uniprot.org/uniprot/CD81_MOUSE CD81_MOUSE] May play an important role in the regulation of lymphoma cell growth. May be involved in the acrosome reaction.<ref>PMID:17290409</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Lk3 transgenic mice]] | + | [[Category: Mus musculus]] |
| - | [[Category: Cui, S]] | + | [[Category: Cui S]] |
| - | [[Category: Zhang, M]] | + | [[Category: Zhang M]] |
| - | [[Category: Activation]]
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| - | [[Category: Cell adhesion]]
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| - | [[Category: Differentiation]]
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| - | [[Category: Disulfide bond]]
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| - | [[Category: Helical bundle]]
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| - | [[Category: Immune cell adhesion]]
| + | |
| - | [[Category: Membrane]]
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| - | [[Category: Morphology]]
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| - | [[Category: Proliferation]]
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| Structural highlights
Function
CD81_MOUSE May play an important role in the regulation of lymphoma cell growth. May be involved in the acrosome reaction.[1]
Publication Abstract from PubMed
Hepatitis C virus (HCV) infection is one of the leading causes of chronic liver diseases; however, HCV vaccine remains unavailable to date. One main obstacle is the lack of an efficient small animal model. Cluster of differentiation 81 (CD81) is an essential entry coreceptor for HCV species specificity to human, though the underlying mechanisms are yet to be fully elucidated. We performed structural, biophysical, and virologic studies on HCV nonpermissive CD81s from mouse and African green monkey [mouse cluster of differentiation 81 (mCD81) and African green monkey cluster of differentiation 81 (agmCD81)] and compared with human cluster of differentiation 81 (hCD81). We discovered an intramolecular hydrogen bond (Gln188-Nepsilon2-H: Glu196-Oepsilon2, 2 A, 124 degrees ) within the large extracellular loop (LEL) of mCD81 and a salt bridge (Lys188-Nzeta: Asp196-Odelta2, 2.4 A) within agmCD81-LEL between 188-196 residues. This structural feature is missing in hCD81. We demonstrated that the introduction of a single 188-196 bond to hCD81 impaired its binding affinity to HCV envelope glycoprotein 2 (HCV E2) and significantly decreased HCV pseudoviral particle (HCVpp) entry efficiency (4.92- to 8.42-fold) and cell culture-grown HCV (HCVcc) infectivity (4.55-fold), despite the availability of Phe186. For HCV nonpermissive CD81s, the introduction of Phe186 by Leu186F substitution alone was insufficient to confer HCV permissiveness. The disruption of the original 188-196 bond and Leu186F substitution were both required for potent binding to HCV E2 HCVpp entry efficiency and HCVcc infectivity. Our structural and biophysical analyses suggest that the intramolecular 188-196 bond restricts the intrinsic conformational dynamics of D-helix of CD81-LEL, which is essential for HCV entry, thus impairs HCV permissiveness. Our findings reveal a novel molecular determinant for HCV entry in addition to the well-characterized Phe186 and provide further guideline for selecting an HCV small animal model.-Yang, W., Zhang, M., Chi, X., Liu, X., Qin, B., Cui, S. An intramolecular bond at cluster of differentiation 81 ectodomain is important for hepatitis C virus entry.
An intramolecular bond at cluster of differentiation 81 ectodomain is important for hepatitis C virus entry.,Yang W, Zhang M, Chi X, Liu X, Qin B, Cui S FASEB J. 2015 Jun 26. pii: fj.15-272880. PMID:26116703[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Tanigawa M, Miyamoto K, Kobayashi S, Sato M, Akutsu H, Okabe M, Mekada E, Sakakibara K, Miyado M, Umezawa A, Miyado K. Possible involvement of CD81 in acrosome reaction of sperm in mice. Mol Reprod Dev. 2008 Jan;75(1):150-5. PMID:17290409 doi:http://dx.doi.org/10.1002/mrd.20709
- ↑ Yang W, Zhang M, Chi X, Liu X, Qin B, Cui S. An intramolecular bond at cluster of differentiation 81 ectodomain is important for hepatitis C virus entry. FASEB J. 2015 Jun 26. pii: fj.15-272880. PMID:26116703 doi:http://dx.doi.org/10.1096/fj.15-272880
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