5m2i

From Proteopedia

(Difference between revisions)

Revision as of 10:59, 12 August 2020

Structure of human Tumor Necrosis Factor (TNF) in complex with the Llama VHH1

Structural highlights

5m2i is a 12 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[TNFA_HUMAN] Genetic variations in TNF are a cause of susceptibility psoriatic arthritis (PSORAS) [MIM:607507]. PSORAS is an inflammatory, seronegative arthritis associated with psoriasis. It is a heterogeneous disorder ranging from a mild, non-destructive disease to a severe, progressive, erosive arthropathy. Five types of psoriatic arthritis have been defined: asymmetrical oligoarthritis characterized by primary involvement of the small joints of the fingers or toes; asymmetrical arthritis which involves the joints of the extremities; symmetrical polyarthritis characterized by a rheumatoidlike pattern that can involve hands, wrists, ankles, and feet; arthritis mutilans, which is a rare but deforming and destructive condition; arthritis of the sacroiliac joints and spine (psoriatic spondylitis).

Function

[TNFA_HUMAN] Cytokine that binds to TNFRSF1A/TNFR1 and TNFRSF1B/TNFBR. It is mainly secreted by macrophages and can induce cell death of certain tumor cell lines. It is potent pyrogen causing fever by direct action or by stimulation of interleukin-1 secretion and is implicated in the induction of cachexia, Under certain conditions it can stimulate cell proliferation and induce cell differentiation.^[1] The TNF intracellular domain (ICD) form induces IL12 production in dendritic cells.^[2]

Publication Abstract from PubMed

The activity of tumor necrosis factor (TNF), a cytokine involved in inflammatory pathologies, can be inhibited by antibodies or trap molecules. Herein, llama-derived variable heavy-chain domains of heavy-chain antibody (VHH, also called Nanobodies) were generated for the engineering of bivalent constructs, which antagonize the binding of TNF to its receptors with picomolar potencies. Three monomeric VHHs (VHH#1, VHH#2, and VHH#3) were characterized in detail and found to bind TNF with sub-nanomolar affinities. The crystal structures of the TNF-VHH complexes demonstrate that VHH#1 and VHH#2 share the same epitope, at the center of the interaction area of TNF with its TNFRs, while VHH#3 binds to a different, but partially overlapping epitope. These structures rationalize our results obtained with bivalent constructs in which two VHHs were coupled via linkers of different lengths. Contrary to conventional antibodies, these bivalent Nanobody constructs can bind to a single trimeric TNF, thus binding with avidity and blocking two of the three receptor binding sites in the cytokine. The different mode of binding to antigen and the engineering into bivalent constructs supports the design of highly potent VHH-based therapeutic entities.

Bivalent Llama Single-Domain Antibody Fragments against Tumor Necrosis Factor Have Picomolar Potencies due to Intramolecular Interactions.,Beirnaert E, Desmyter A, Spinelli S, Lauwereys M, Aarden L, Dreier T, Loris R, Silence K, Pollet C, Cambillau C, de Haard H Front Immunol. 2017 Jul 31;8:867. doi: 10.3389/fimmu.2017.00867. eCollection, 2017. PMID:28824615^[3]

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

References

↑ Friedmann E, Hauben E, Maylandt K, Schleeger S, Vreugde S, Lichtenthaler SF, Kuhn PH, Stauffer D, Rovelli G, Martoglio B. SPPL2a and SPPL2b promote intramembrane proteolysis of TNFalpha in activated dendritic cells to trigger IL-12 production. Nat Cell Biol. 2006 Aug;8(8):843-8. Epub 2006 Jul 9. PMID:16829952 doi:10.1038/ncb1440
↑ Friedmann E, Hauben E, Maylandt K, Schleeger S, Vreugde S, Lichtenthaler SF, Kuhn PH, Stauffer D, Rovelli G, Martoglio B. SPPL2a and SPPL2b promote intramembrane proteolysis of TNFalpha in activated dendritic cells to trigger IL-12 production. Nat Cell Biol. 2006 Aug;8(8):843-8. Epub 2006 Jul 9. PMID:16829952 doi:10.1038/ncb1440
↑ Beirnaert E, Desmyter A, Spinelli S, Lauwereys M, Aarden L, Dreier T, Loris R, Silence K, Pollet C, Cambillau C, de Haard H. Bivalent Llama Single-Domain Antibody Fragments against Tumor Necrosis Factor Have Picomolar Potencies due to Intramolecular Interactions. Front Immunol. 2017 Jul 31;8:867. doi: 10.3389/fimmu.2017.00867. eCollection, 2017. PMID:28824615 doi:http://dx.doi.org/10.3389/fimmu.2017.00867

1 Structural highlights
2 Disease
3 Function
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5m2i"

@@ Line 1: / Line 1: @@
 ==Structure of human Tumor Necrosis Factor (TNF) in complex with the Llama VHH1==
-<StructureSection load='5m2i' size='340' side='right' caption='[[5m2i]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
+<StructureSection load='5m2i' size='340' side='right'caption='[[5m2i]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5m2i]] is a 12 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5M2I OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5M2I FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5m2i]] is a 12 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5M2I OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5M2I FirstGlance]. <br>
-</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=5m2i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5m2i OCA], [http://pdbe.org/5m2i PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5m2i RCSB], [http://www.ebi.ac.uk/pdbsum/5m2i PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5m2i ProSAT]</span></td></tr>
+</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5m2i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5m2i OCA], [http://pdbe.org/5m2i PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5m2i RCSB], [http://www.ebi.ac.uk/pdbsum/5m2i PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5m2i ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 19: / Line 19: @@
 </div>
 <div class="pdbe-citations 5m2i" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Tumor necrosis factor|Tumor necrosis factor]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Cambillau, C]]
 [[Category: Desmyter, A]]

5m2i

From Proteopedia

Revision as of 10:59, 12 August 2020

Structure of human Tumor Necrosis Factor (TNF) in complex with the Llama VHH1

Structural highlights

Disease

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox