3thm

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== Function ==
== Function ==
[https://www.uniprot.org/uniprot/TNR6_HUMAN TNR6_HUMAN] Receptor for TNFSF6/FASLG. The adapter molecule FADD recruits caspase-8 to the activated receptor. The resulting death-inducing signaling complex (DISC) performs caspase-8 proteolytic activation which initiates the subsequent cascade of caspases (aspartate-specific cysteine proteases) mediating apoptosis. FAS-mediated apoptosis may have a role in the induction of peripheral tolerance, in the antigen-stimulated suicide of mature T-cells, or both. The secreted isoforms 2 to 6 block apoptosis (in vitro).<ref>PMID:7533181</ref> <ref>PMID:19118384</ref>
[https://www.uniprot.org/uniprot/TNR6_HUMAN TNR6_HUMAN] Receptor for TNFSF6/FASLG. The adapter molecule FADD recruits caspase-8 to the activated receptor. The resulting death-inducing signaling complex (DISC) performs caspase-8 proteolytic activation which initiates the subsequent cascade of caspases (aspartate-specific cysteine proteases) mediating apoptosis. FAS-mediated apoptosis may have a role in the induction of peripheral tolerance, in the antigen-stimulated suicide of mature T-cells, or both. The secreted isoforms 2 to 6 block apoptosis (in vitro).<ref>PMID:7533181</ref> <ref>PMID:19118384</ref>
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== Publication Abstract from PubMed ==
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Receptor agonism remains poorly understood at the molecular and mechanistic level. In this study, we identified a fully human anti-Fas antibody that could efficiently trigger apoptosis and therefore function as a potent agonist. Protein engineering and crystallography were used to mechanistically understand the agonistic activity of the antibody. The crystal structure of the complex was determined at 1.9 A resolution and provided insights into epitope recognition and comparisons with the natural ligand FasL (Fas ligand). When we affinity-matured the agonist antibody, we observed that, surprisingly, the higher-affinity antibodies demonstrated a significant reduction, rather than an increase, in agonist activity at the Fas receptor. We propose and experimentally demonstrate a model to explain this non-intuitive impact of affinity on agonist antibody signalling and explore the implications for the discovery of therapeutic agonists in general.Cell Death and Differentiation advance online publication, 20 January 2012; doi:10.1038/cdd.2011.208.
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A series of Fas receptor agonist antibodies that demonstrate an inverse correlation between affinity and potency.,Chodorge M, Zuger S, Stirnimann C, Briand C, Jermutus L, Grutter MG, Minter RR Cell Death Differ. 2012 Jan 20. doi: 10.1038/cdd.2011.208. PMID:22261618<ref>PMID:22261618</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
==See Also==

Current revision

Crystal structure of Fas receptor extracellular domain in complex with Fab EP6b_B01

PDB ID 3thm

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