View source for 8tjt


==The Fab fragment of an anti-glucagon receptor (GCGR) antibody==
<StructureSection load='8tjt' size='340' side='right'caption='[[8tjt]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8tjt]] 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=8TJT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8TJT 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]] 2.7&#8491;</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=8tjt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8tjt OCA], [https://pdbe.org/8tjt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8tjt RCSB], [https://www.ebi.ac.uk/pdbsum/8tjt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8tjt ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Subcutaneous injection is the preferred route of administration for many antibody therapeutics for reasons that include its speed and convenience. However, the small volume limit (typically &lt;/= 2 mL) for subcutaneous delivery often necessitates antibody formulations at high concentrations (commonly &gt;/=100 mg/mL), which may lead to physicochemical problems. For example, antibodies with large hydrophobic or charged patches can be prone to self-interaction giving rise to high viscosity. Here, we combined X-ray crystallography with computational modeling to predict regions of an anti-glucagon receptor (GCGR) IgG(1) antibody prone to self-interaction. An extensive mutational analysis was undertaken of the complementarity-determining region residues residing in hydrophobic surface patches predicted by spatial aggregation propensity, in conjunction with residue-level solvent accessibility, averaged over conformational ensembles from molecular dynamics simulations. Dynamic light scattering (DLS) was used as a medium throughput screen for self-interaction of ~ 200 anti-GCGR IgG(1) variants. A negative correlation was found between the viscosity determined at high concentration (180 mg/mL) and the DLS interaction parameter measured at low concentration (2-10 mg/mL). Additionally, anti-GCGR variants were readily identified with reduced viscosity and antigen-binding affinity within a few fold of the parent antibody, with no identified impact on overall developability. The methods described here may be useful in the optimization of other antibodies to facilitate their therapeutic administration at high concentration.

Variable domain mutational analysis to probe the molecular mechanisms of high viscosity of an IgG(1) antibody.,Dai J, Izadi S, Zarzar J, Wu P, Oh A, Carter PJ MAbs. 2024 Jan-Dec;16(1):2304282. doi: 10.1080/19420862.2024.2304282. Epub 2024 , Jan 25. PMID:38269489<ref>PMID:38269489</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8tjt" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Carter PJ]]
[[Category: Dai J]]
[[Category: Kung J]]
[[Category: Sudhamsu J]]