View source for 7afv


==Crystal structure of tetrameric beta-2-microglobulin deltaN6 S52C stabilized by a covalent ligand==
<StructureSection load='7afv' size='340' side='right'caption='[[7afv]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7AFV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7AFV 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]] 2.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SJK:5-oxidanylidene-~{N}-(2-sulfanylethyl)-2,3-dihydro-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxamide'>SJK</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</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=7afv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7afv OCA], [https://pdbe.org/7afv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7afv RCSB], [https://www.ebi.ac.uk/pdbsum/7afv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7afv ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Protein-protein interactions (PPIs) are involved in many of life's essential biological functions yet are also an underlying cause of several human diseases, including amyloidosis. The modulation of PPIs presents opportunities to gain mechanistic insights into amyloid assembly, particularly through the use of methods which can trap specific intermediates for detailed study. Such information can also provide a starting point for drug discovery. Here, we demonstrate that covalently tethered small molecule fragments can be used to stabilize specific oligomers during amyloid fibril formation, facilitating the structural characterization of these assembly intermediates. We exemplify the power of covalent tethering using the naturally occurring truncated variant (DeltaN6) of the human protein beta2-microglobulin (beta2m), which assembles into amyloid fibrils associated with dialysis-related amyloidosis. Using this approach, we have trapped tetramers formed by DeltaN6 under conditions which would normally lead to fibril formation and found that the degree of tetramer stabilization depends on the site of the covalent tether and the nature of the protein-fragment interaction. The covalent protein-ligand linkage enabled structural characterization of these trapped, off-pathway oligomers using X-ray crystallography and NMR, providing insight into why tetramer stabilization inhibits amyloid assembly. Our findings highlight the power of "post-translational chemical modification" as a tool to study biological molecular mechanisms.

Modulation of Amyloidogenic Protein Self-Assembly Using Tethered Small Molecules.,Cawood EE, Guthertz N, Ebo JS, Karamanos TK, Radford SE, Wilson AJ J Am Chem Soc. 2020 Nov 30. doi: 10.1021/jacs.0c10629. PMID:33253560<ref>PMID:33253560</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7afv" style="background-color:#fffaf0;"></div>

==See Also==
*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Cawood E]]
[[Category: Guthertz N]]
[[Category: Karamanos T]]