View source for 7tus


==Sculpting a uniquely reactive cysteine residue for site-specific antibody conjugation==
<StructureSection load='7tus' size='340' side='right'caption='[[7tus]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7tus]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7TUS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7TUS 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=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=7tus FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7tus OCA], [https://pdbe.org/7tus PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7tus RCSB], [https://www.ebi.ac.uk/pdbsum/7tus PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7tus ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Catalytic antibody 38C2 and its humanized version h38C2 harbor a uniquely reactive lysine at the bottom of a 11 A deep pocket that permits site-specific conjugation of beta-diketone-, beta-lactam-, and heteroaryl methylsulfonyl-functionalized small and large molecules. Various dual variable domain formats pair a tumor-targeting antibody with h38C2 to enable precise, fast, and stable assembly of antibody-drug conjugates (ADCs). Here, we expand the scope of this ADC assembly strategy by mutating h38C2's reactive lysine to a cysteine. X-ray crystallography of this point mutant, h38C2_K99C, confirmed a deeply buried unpaired cysteine. Probing h38C2_K99C with maleimide, monobromomaleimide, and dibromomaleimide derivatives of a fluorophore revealed highly disparate conjugation efficiencies and stabilities. Dibromomaleimide emerged as a suitable electrophile for the precise, fast, efficient, and stable assembly of ADCs with the h38C2_K99C module. Mass spectrometry indicated the presence of a thio-monobromomaleimide linkage which was further supported by in silico docking studies. Using a dibromomaleimide derivative of the highly potent tubulin polymerization inhibitor monomethyl auristatin F, h38C2_K99C-based ADCs were found to be as potent as h38C2-based ADCs and afford a new assembly route for ADCs with single and dual payloads.

Sculpting a Uniquely Reactive Cysteine Residue for Site-Specific Antibody Conjugation.,Hwang D, Nilchan N, Park H, Roy RN, Roush WR, Rader C Bioconjug Chem. 2022 Jun 15;33(6):1192-1200. doi: , 10.1021/acs.bioconjchem.2c00146. Epub 2022 May 18. PMID:35584359<ref>PMID:35584359</ref>

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

==See Also==
*[[Antibody 3D structures|Antibody 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Park H]]
[[Category: Rader C]]