View source for 7p5b


==Variant Surface Glycoprotein 3 (VSG3, MiTat1.3, VSG224) mutant (serine 319 to alanine), single O-linked glycosylated at Ser317==
<StructureSection load='7p5b' size='340' side='right'caption='[[7p5b]], [[Resolution|resolution]] 1.13&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7p5b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Trypanosoma_brucei_brucei Trypanosoma brucei brucei]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7P5B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7P5B FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.13&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></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=7p5b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7p5b OCA], [https://pdbe.org/7p5b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7p5b RCSB], [https://www.ebi.ac.uk/pdbsum/7p5b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7p5b ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/B3GVK1_TRYBB B3GVK1_TRYBB] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The African trypanosome survives the immune response of its mammalian host by antigenic variation of its major surface antigen (the variant surface glycoprotein or VSG). Here we describe the antibody repertoires elicited by different VSGs. We show that the repertoires are highly restricted and are directed predominantly to distinct epitopes on the surface of the VSGs. They are also highly discriminatory; minor alterations within these exposed epitopes confer antigenically distinct properties to these VSGs and elicit different repertoires. We propose that the patterned and repetitive nature of the VSG coat focuses host immunity to a restricted set of immunodominant epitopes per VSG, eliciting a highly stereotyped response, minimizing cross-reactivity between different VSGs and facilitating prolonged immune evasion through epitope variation.

Immunodominant surface epitopes power immune evasion in the African trypanosome.,Gkeka A, Aresta-Branco F, Triller G, Vlachou EP, van Straaten M, Lilic M, Olinares PDB, Perez K, Chait BT, Blatnik R, Ruppert T, Verdi JP, Stebbins CE, Papavasiliou FN Cell Rep. 2023 Mar 28;42(3):112262. doi: 10.1016/j.celrep.2023.112262. Epub 2023 , Mar 20. PMID:36943866<ref>PMID:36943866</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7p5b" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Trypanosoma brucei brucei]]
[[Category: Aresta-Branco F]]
[[Category: Gkeka A]]
[[Category: Papavasiliou FN]]
[[Category: Stebbins CE]]