6pe9

From Proteopedia

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Current revision

Crystal Structure of CD40 complexed to FAB516

Structural highlights

6pe9 is a 15 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 3.13Å
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

BACKGROUND: CD40 is a 48 kDa type I transmembrane protein that is constitutively expressed on hematopoietic cells such as dendritic cells, macrophages, and B cells. Engagement of CD40 by CD40L expressed on T cells results in the production of proinflammatory cytokines, induces T helper cell function, and promotes macrophage activation. The involvement of CD40 in chronic immune activation has resulted in CD40 being proposed as a therapeutic target for a range of chronic inflammatory diseases. CD40 antagonists are currently being explored for the treatment of autoimmune diseases and several anti-CD40 agonist mAbs have entered clinical development for oncological indications. RESULTS: To better understand the mode of action of anti-CD40 mAbs, we have determined the x-ray crystal structures of the ABBV-323 (anti-CD40 antagonist, ravagalimab) Fab alone, ABBV-323 Fab complexed to human CD40 and FAB516 (anti-CD40 agonist) complexed to human CD40. These three crystals structures 1) identify the conformational CD40 epitope for ABBV-323 recognition 2) illustrate conformational changes which occur in the CDRs of ABBV-323 Fab upon CD40 binding and 3) develop a structural hypothesis for an agonist/antagonist switch in the LCDR1 of this proprietary class of CD40 antibodies. CONCLUSIONS: The structure of ABBV-323 Fab demonstrates a unique method for antagonism by stabilizing the proposed functional antiparallel dimer for CD40 receptor via novel contacts to LCDR1, namely residue position R32 which is further supported by a closely related agonist antibody FAB516 which shows only monomeric recognition and no contacts with LCDR1 due to a mutation to L32 on LCDR1. These data provide a structural basis for the full antagonist activity of ABBV-323.

CD40/anti-CD40 antibody complexes which illustrate agonist and antagonist structural switches.,Argiriadi MA, Benatuil L, Dubrovska I, Egan DA, Gao L, Greischar A, Hardman J, Harlan J, Iyer RB, Judge RA, Lake M, Perron DC, Sadhukhan R, Sielaff B, Sousa S, Wang R, McRae BL BMC Mol Cell Biol. 2019 Aug 5;20(1):29. doi: 10.1186/s12860-019-0213-4. PMID:31382872^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Argiriadi MA, Benatuil L, Dubrovska I, Egan DA, Gao L, Greischar A, Hardman J, Harlan J, Iyer RB, Judge RA, Lake M, Perron DC, Sadhukhan R, Sielaff B, Sousa S, Wang R, McRae BL. CD40/anti-CD40 antibody complexes which illustrate agonist and antagonist structural switches. BMC Mol Cell Biol. 2019 Aug 5;20(1):29. doi: 10.1186/s12860-019-0213-4. PMID:31382872 doi:http://dx.doi.org/10.1186/s12860-019-0213-4

1 Structural highlights
2 Publication Abstract from PubMed
3 See Also
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/6pe9"

Categories: Homo sapiens | Large Structures | Argiriadi MA

@@ Line 3: / Line 3: @@
 <StructureSection load='6pe9' size='340' side='right'caption='[[6pe9]], [[Resolution|resolution]] 3.13&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6pe9]] is a 15 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6PE9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6PE9 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6pe9]] is a 15 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=6PE9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6PE9 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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]] 3.13&#8491;</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6pe9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6pe9 OCA], [http://pdbe.org/6pe9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6pe9 RCSB], [http://www.ebi.ac.uk/pdbsum/6pe9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6pe9 ProSAT]</span></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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=6pe9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6pe9 OCA], [https://pdbe.org/6pe9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6pe9 RCSB], [https://www.ebi.ac.uk/pdbsum/6pe9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6pe9 ProSAT]</span></td></tr>
 </table>
-== Disease ==
-[[http://www.uniprot.org/uniprot/TNR5_HUMAN TNR5_HUMAN]] Defects in CD40 are the cause of immunodeficiency with hyper-IgM type 3 (HIGM3) [MIM:[http://omim.org/entry/606843 606843]]. A rare immunodeficiency syndrome characterized by normal or elevated serum IgM levels with absence of IgG, IgA, and IgE. It results in a profound susceptibility to bacterial infections.<ref>PMID:11675497</ref>
-== Function ==
-[[http://www.uniprot.org/uniprot/TNR5_HUMAN TNR5_HUMAN]] Receptor for TNFSF5/CD40LG.
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 20: / Line 17: @@
 </div>
 <div class="pdbe-citations 6pe9" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Antibody 3D structures|Antibody 3D structures]]
+*[[Tumor necrosis factor receptor 3D structures|Tumor necrosis factor receptor 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Homo sapiens]]
 [[Category: Large Structures]]
-[[Category: Argiriadi, M A]]
+[[Category: Argiriadi MA]]
-[[Category: Cd40]]
-[[Category: Complex]]
-[[Category: Fab]]
-[[Category: Immune system]]

6pe9

From Proteopedia

Current revision

Crystal Structure of CD40 complexed to FAB516

Structural highlights

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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