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6u6u

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IL36R extracellular domain in complex with BI655130 Fab

Structural highlights

6u6u is a 3 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 2.31Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ILRL2_HUMAN Receptor for interleukin-36 (IL36A, IL36B and IL36G). After binding to interleukin-36 associates with the coreceptor IL1RAP to form the interleukin-36 receptor complex which mediates interleukin-36-dependent activation of NF-kappa-B, MAPK and other pathways (By similarity). The IL-36 signaling system is thought to be present in epithelial barriers and to take part in local inflammatory response; it is similar to the IL-1 system. Seems to be involved in skin inflammatory response by induction of the IL-23/IL-17/IL-22 pathway.[UniProtKB:Q9ERS7]^[1]

Publication Abstract from PubMed

Cellular signaling via binding of the cytokines IL-36alpha, beta and gamma along with binding of the accessory protein IL-36RAcP, to their cognate receptor IL-36R is believed to play a major role in epithelial and immune cell mediated inflammation responses. Antagonizing the signaling cascade that results from these binding events via a directed monoclonal antibody provides an opportunity to suppress such immune responses. We report here the molecular structure of a complex between an extra-cellular portion of human IL-36R and a Fab derived from a high affinity anti-IL-36R neutralizing monoclonal antibody at 2.3a resolution. This structure, the first of IL-36R, reveals similarities with other structurally characterized IL-1R family members and elucidates the molecular determinants leading to the high affinity binding of the monoclonal antibody. The structure of the complex reveals that the epitope recognized by the Fab is remote from both the putative ligand and accessory protein binding interfaces on IL-36R, suggesting that the functional activity of the antibody is non-competitive for these binding events. This article is protected by copyright. All rights reserved.

X-ray Crystal Structure Localizes the Mechanism of Inhibition of an IL-36R Antagonist Monoclonal Antibody to Interaction with Ig1 and Ig2 ECDs.,Larson ET, Brennan DL, Hickey ER, Ganesan R, Kroe-Barrett R, Farrow NA Protein Sci. 2020 Apr 2. doi: 10.1002/pro.3862. PMID:32239732^[2]

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

References

↑ Debets R, Timans JC, Homey B, Zurawski S, Sana TR, Lo S, Wagner J, Edwards G, Clifford T, Menon S, Bazan JF, Kastelein RA. Two novel IL-1 family members, IL-1 delta and IL-1 epsilon, function as an antagonist and agonist of NF-kappa B activation through the orphan IL-1 receptor-related protein 2. J Immunol. 2001 Aug 1;167(3):1440-6. doi: 10.4049/jimmunol.167.3.1440. PMID:11466363 doi:http://dx.doi.org/10.4049/jimmunol.167.3.1440
↑ Larson ET, Brennan DL, Hickey ER, Ganesan R, Kroe-Barrett R, Farrow NA. X-ray Crystal Structure Localizes the Mechanism of Inhibition of an IL-36R Antagonist Monoclonal Antibody to Interaction with Ig1 and Ig2 ECDs. Protein Sci. 2020 Apr 2. doi: 10.1002/pro.3862. PMID:32239732 doi:http://dx.doi.org/10.1002/pro.3862