4g6m: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4g6m]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4G6M OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4G6M FirstGlance]. <br>
<table><tr><td colspan='2'>[[4g6m]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4G6M OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4G6M FirstGlance]. <br>
</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=4g6m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4g6m OCA], [https://pdbe.org/4g6m PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4g6m RCSB], [https://www.ebi.ac.uk/pdbsum/4g6m PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4g6m ProSAT]</span></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.81&#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=4g6m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4g6m OCA], [https://pdbe.org/4g6m PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4g6m RCSB], [https://www.ebi.ac.uk/pdbsum/4g6m PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4g6m ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/IL1B_HUMAN IL1B_HUMAN] Produced by activated macrophages, IL-1 stimulates thymocyte proliferation by inducing IL-2 release, B-cell maturation and proliferation, and fibroblast growth factor activity. IL-1 proteins are involved in the inflammatory response, being identified as endogenous pyrogens, and are reported to stimulate the release of prostaglandin and collagenase from synovial cells.<ref>PMID:3920526</ref>  
[https://www.uniprot.org/uniprot/IL1B_HUMAN IL1B_HUMAN] Produced by activated macrophages, IL-1 stimulates thymocyte proliferation by inducing IL-2 release, B-cell maturation and proliferation, and fibroblast growth factor activity. IL-1 proteins are involved in the inflammatory response, being identified as endogenous pyrogens, and are reported to stimulate the release of prostaglandin and collagenase from synovial cells.<ref>PMID:3920526</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Interleukin-1beta (IL-1beta) is a key orchestrator in inflammatory and several immune responses. IL-1beta exerts its effects through interleukin-1 receptor type I (IL-1RI) and interleukin-1 receptor accessory protein (IL-1RAcP), which together form a heterotrimeric signaling-competent complex. Canakinumab and gevokizumab are highly specific IL-1beta monoclonal antibodies. Canakinumab is known to neutralize IL-1beta by competing for binding to IL-1R and therefore blocking signaling by the antigen:antibody complex. Gevokizumab is claimed to be a regulatory therapeutic antibody that modulates IL-1beta bioactivity by reducing the affinity for its IL-1RI:IL-1RAcP signaling complex. How IL-1beta signaling is affected by both canakinumab and gevokizumab was not yet experimentally determined. We have analyzed the crystal structures of canakinumab and gevokizumab antibody binding fragment (Fab) as well as of their binary complexes with IL-1beta. Furthermore, we characterized the epitopes on IL-1beta employed by the antibodies by NMR epitope mapping studies. The direct comparison of NMR and X-ray data shows that the epitope defined by the crystal structure encompasses predominantly those residues whose NMR resonances are severely perturbed upon complex formation. The antigen:Fab co-structures confirm the previously identified key contact residues on IL-1beta and provide insight into the mechanisms leading to their distinct modulation of IL-1beta signaling. A significant steric overlap of the binding interfaces of IL-1R and canakinumab on IL-1beta causes competitive inhibition of the association of IL-1beta and its receptor. In contrast, gevokizumab occupies an allosteric site on IL-1beta and complex formation results in a minor reduction of binding affinity to IL-1RI. This suggests two different mechanisms of IL-1beta pathway attenuation.
One Target-Two Different Binding Modes: Structural Insights into Gevokizumab and Canakinumab Interactions to Interleukin-1beta,Blech M, Peter D, Fischer P, Bauer MM, Hafner M, Zeeb M, Nar H J Mol Biol. 2012 Oct 3. pii: S0022-2836(12)00786-3. doi:, 10.1016/j.jmb.2012.09.021. PMID:23041424<ref>PMID:23041424</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 4g6m" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==

Revision as of 15:40, 14 March 2024

Crystal structure of human IL-1beta in complex with therapeutic antibody binding fragment of gevokizumab

4g6m, resolution 1.81Å

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