This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

5m3t

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 07:26, 13 December 2017

Structural tuning of CD81LEL (space group P64)

Structural highlights

5m3t is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	5m2c, 5m3d, 5m33, 5m4r, 1g8q, 1iv5
Gene:	CD81, TAPA1, TSPAN28 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[CD81_HUMAN] Defects in CD81 are the cause of immunodeficiency common variable type 6 (CVID6) [MIM:613496]; also called antibody deficiency due to CD81 defect. CVID6 is a primary immunodeficiency characterized by antibody deficiency, hypogammaglobulinemia, recurrent bacterial infections and an inability to mount an antibody response to antigen. The defect results from a failure of B-cell differentiation and impaired secretion of immunoglobulins; the numbers of circulating B-cells is usually in the normal range, but can be low.^[1]

Function

[CD81_HUMAN] May play an important role in the regulation of lymphoma cell growth. Interacts with a 16-kDa Leu-13 protein to form a complex possibly involved in signal transduction. May act as the viral receptor for HCV.

Publication Abstract from PubMed

Hepatitis C virus (HCV) enters into human hepatocytes via tetraspanin hCD81. HCV glycoprotein E2 recognizes the "head" subdomain of the large extracellular loop (LEL) of CD81 (hCD81LEL), but the precise mechanism of virus cell attachment and entry remains elusive. Here, by combining the structural analysis of a conspicuous number of crystallized CD81LEL molecules with molecular dynamics simulations, we show that the conformational plasticity of the hCD81LEL head subdomain is a molecular property of the receptor. The observed closed, intermediate, and open conformations of the head subdomain provide distinct binding platforms. Simulations at pH 7.4 and 4.0 indicate that this dynamism is pH modulated. The crystallized double conformation of the disulfide bridge C157-C175 at the base of the head subdomain identifies this bond as the molecular zipper of the plasticity of hCD81LEL. We propose that this conformational dependence of hCD81LEL, which is finely tuned by pH and redox conditions, enables the virus-receptor interactions to diversely re-engage at endosomal conditions.

Mechanism of Structural Tuning of the Hepatitis C Virus Human Cellular Receptor CD81 Large Extracellular Loop.,Cunha ES, Sfriso P, Rojas AL, Hospital A, Orozco M, Abrescia NG Structure. 2016 Nov 21. pii: S0969-2126(16)30343-4. doi:, 10.1016/j.str.2016.11.003. PMID:27916518^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ van Zelm MC, Smet J, Adams B, Mascart F, Schandene L, Janssen F, Ferster A, Kuo CC, Levy S, van Dongen JJ, van der Burg M. CD81 gene defect in humans disrupts CD19 complex formation and leads to antibody deficiency. J Clin Invest. 2010 Apr;120(4):1265-74. doi: 10.1172/JCI39748. Epub 2010 Mar 8. PMID:20237408 doi:10.1172/JCI39748
↑ Cunha ES, Sfriso P, Rojas AL, Hospital A, Orozco M, Abrescia NG. Mechanism of Structural Tuning of the Hepatitis C Virus Human Cellular Receptor CD81 Large Extracellular Loop. Structure. 2016 Nov 21. pii: S0969-2126(16)30343-4. doi:, 10.1016/j.str.2016.11.003. PMID:27916518 doi:http://dx.doi.org/10.1016/j.str.2016.11.003

1 Structural highlights
2 Disease
3 Function
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5m3t"

@@ Line 3: / Line 3: @@
 <StructureSection load='5m3t' size='340' side='right' caption='[[5m3t]], [[Resolution|resolution]] 2.02&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5m3t]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5M3T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5M3T FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5m3t]] is a 2 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=5M3T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5M3T FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5m2c|5m2c]], [[5m3d|5m3d]], [[5m33|5m33]], [[5m4r|5m4r]], [[1g8q|1g8q]], [[1iv5|1iv5]]</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CD81, TAPA1, TSPAN28 ([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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5m3t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5m3t OCA], [http://pdbe.org/5m3t PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5m3t RCSB], [http://www.ebi.ac.uk/pdbsum/5m3t PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5m3t ProSAT]</span></td></tr>
 </table>
@@ Line 25: / Line 26: @@
 __TOC__
 </StructureSection>
-[[Category: Abrescia, N G.A]]
+[[Category: Human]]
+[[Category: Abrescia, N G]]
+[[Category: Cunha, E S]]
+[[Category: Hospital, A]]
+[[Category: Orozco, M]]
+[[Category: Rojas, A L]]
+[[Category: Roversi, P]]
+[[Category: Sfriso, P]]
 [[Category: Human cellular receptor for hepatitis c virus]]
 [[Category: Immune system]]

5m3t

From Proteopedia

Revision as of 07:26, 13 December 2017

Structural tuning of CD81LEL (space group P64)

Structural highlights

Disease

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox