8rtx: Difference between revisions
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==Crystal Structure of an Anti-idiotype Fab Fragment== | |||
<StructureSection load='8rtx' size='340' side='right'caption='[[8rtx]], [[Resolution|resolution]] 2.70Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[8rtx]] is a 6 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=8RTX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8RTX 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]] 2.7Å</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=8rtx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8rtx OCA], [https://pdbe.org/8rtx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8rtx RCSB], [https://www.ebi.ac.uk/pdbsum/8rtx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8rtx ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Anti-immunocomplex (Anti-IC) antibodies have been used in developing noncompetitive immunoassays for detecting small molecule analytics (haptens). These antibodies bind specifically to the primary antibody in complex with hapten. Although several anti-IC antibody-based immunoassays have been developed, structural studies of these systems are very limited. In this study, we determined the crystal structures of anti-testosterone Fab220 in complex with testosterone and the corresponding anti-IC antibody FabB12. The structure of the ternary complex of testosterone, Fab220, and FabB12 was predicted using LightDock and AlphaFold. The ternary complex has a large (~ 1100 A(2)) interface between antibodies. The A-ring of the testosterone bound by Fab220 also participates in the binding of the anti-IC antibody. The structural analysis was complemented by native mass spectrometry. The affinities for testosterone (TES) and three cross-reactive steroids [dihydrotestosterone (DHT), androstenedione (A4), and dehydroepiandrosterone sulfate (DHEA-S)] were measured, and ternary complex formation was studied. The results clearly show the ternary complex formation in the solution. Although DHT showed significant cross-reactivity, A4 and DHEA-S exhibited minor cross-reactivity. | |||
Structural insights into ternary immunocomplex formation and cross-reactivity: binding of an anti-immunocomplex FabB12 to Fab220-testosterone complex.,Eronen V, Takkinen K, Torni A, Peng K, Janis J, Parkkinen T, Hakulinen N, Rouvinen J FEBS J. 2024 Aug 29. doi: 10.1111/febs.17258. PMID:39206623<ref>PMID:39206623</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 8rtx" style="background-color:#fffaf0;"></div> | ||
[[Category: Eronen | == References == | ||
[[Category: | <references/> | ||
[[Category: Parkkinen | __TOC__ | ||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Mus musculus]] | |||
[[Category: Eronen V]] | |||
[[Category: Hakulinen N]] | |||
[[Category: Parkkinen T]] | |||
[[Category: Rouvinen J]] | |||
Latest revision as of 04:52, 18 September 2024
Crystal Structure of an Anti-idiotype Fab Fragment
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