5cp7: Difference between revisions
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==Crystal Structure of an Antigen-Binding Fragment of Monoclonal Antibody against Sulfonamides== | ==Crystal Structure of an Antigen-Binding Fragment of Monoclonal Antibody against Sulfonamides== | ||
<StructureSection load='5cp7' size='340' side='right' caption='[[5cp7]], [[Resolution|resolution]] 3.01Å' scene=''> | <StructureSection load='5cp7' size='340' side='right'caption='[[5cp7]], [[Resolution|resolution]] 3.01Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[5cp7]] is a 8 chain structure with sequence from [ | <table><tr><td colspan='2'>[[5cp7]] is a 8 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=5CP7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5CP7 FirstGlance]. <br> | ||
</td></tr> | </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=5cp7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5cp7 OCA], [https://pdbe.org/5cp7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5cp7 RCSB], [https://www.ebi.ac.uk/pdbsum/5cp7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5cp7 ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Li | [[Category: Li C]] | ||
[[Category: Li | [[Category: Li Y]] | ||
[[Category: Shen | [[Category: Shen J]] | ||
[[Category: Wang | [[Category: Wang Z]] | ||
[[Category: Wen | [[Category: Wen K]] | ||
[[Category: Yu | [[Category: Yu X]] | ||
[[Category: Zhang | [[Category: Zhang X]] | ||
Revision as of 15:21, 14 June 2023
Crystal Structure of an Antigen-Binding Fragment of Monoclonal Antibody against SulfonamidesCrystal Structure of an Antigen-Binding Fragment of Monoclonal Antibody against Sulfonamides
Structural highlights
Publication Abstract from PubMedMolecular recognition between a receptor and ligand is a fundamental event in bioanalytical assays, which guarantees the sensitivity and specificity of an assay for the detection of the target of interest. An intensive understanding of the interaction mechanism could be useful for desirable hapten design, directed antibody evolution in vitro, and assay improvement. To illustrate the structural information on class-specific monoclonal antibodies (mAbs) and dihydropteroate synthase (DHPS) against sulfonamides (SAs) we have previously prepared, we initially measured the kinetic parameters of mAb 4C7, 4D11, and DHPS, which showed that the affinities of 4C7 and 4D11 were in the pM to muM range, while DHPS was uniformly in the muM range. Three-dimensional quantitative structure-activity relationship analysis for 4C7 and 4D11 then revealed that the contributions from the stereochemical structure and electron density of the SAs were comparable to binding with mAb. To acquire insights into the structural basis of mAbs and DHPS during the recognition process, the crystal structures of 4C7 and its complex with sulfathiazole were determined using X-ray crystallography. The results showed the SAs orientation and hydrogen bonding interactions mainly contributed to the diverse SAs-mAb affinities. However, for DHPS, a nucleophilic substitution reaction occurred during the recognition process with the SAs, which contributed to the surprisingly uniform affinity for all the SAs tested. This study verified the previous hypotheses on antibody production against SAs and enhanced our understanding of antibody-SAs interactions, which provided useful information toward the rational design of novel haptens and directed evolution to produce class-specific antibodies as DHPS. Class-Specific Monoclonal Antibodies and Dihydropteroate Synthase in Bioassays Used for the Detection of Sulfonamides: Structural Insights into Recognition Diversity.,Li C, Liang X, Wen K, Li Y, Zhang X, Ma M, Yu X, Yu W, Shen J, Wang Z Anal Chem. 2019 Feb 5;91(3):2392-2400. doi: 10.1021/acs.analchem.8b05174. Epub, 2019 Jan 3. PMID:30580515[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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