Molecular Dissection of Human Interleukin-31-mediated Signal Transduction Through Site-directed Mutagenesis
Overview
Authors
Affiliations
Interleukin (IL)-31 is a recently described cytokine, preferentially produced by T helper 2 lymphocytes and associated with skin diseases, such as atopic dermatitis. IL-31 is a member of the four alpha-helix bundle cytokine family and is related to the IL-6 subgroup. Its heterodimeric membrane receptor is composed of the gp130-like receptor (GPL) subunit associated to the oncostatin M receptor subunit. We identified critical amino acids implicated in the ligand receptor interaction by computational analysis combined with site-directed mutagenesis. Six IL-31 residues selected for their putative involvement in cytokine receptor contact sites were alanine-substituted, and the corresponding proteins were expressed in mammalian and bacterial systems. Biochemical, membrane binding, cell signaling, and cell proliferation analyses showed that mutation E44A, E106A, or H110A abolished IL-31 binding to GPL and the subsequent signaling events. A second ligand receptor-binding site involved Lys(134), with alanine substitution leading to a protein that still binds GPL, but is unable to recruit the second receptor subunit and the subsequent signaling pathways. The results indicate that IL-31 recognizes its receptor complex through two different binding sites, and we propose a three-dimensional model for IL-31.
Schmidhuber S, Dickie J, Cserepes M, Tovari J, Schneeberger A, Mandler M PLoS One. 2025; 20(2):e0318293.
PMID: 39932924 PMC: 11813111. DOI: 10.1371/journal.pone.0318293.
Canine interleukin-31 binds directly to OSMRβ with higher binding affinity than to IL-31RA.
Zheng Y, Zhang J, Guo T, Cao J, Wang L, Zhang J 3 Biotech. 2023; 13(9):302.
PMID: 37588794 PMC: 10425310. DOI: 10.1007/s13205-023-03724-7.
Upasham S, Prasad S ACS Omega. 2021; 6(31):20422-20432.
PMID: 34395990 PMC: 8359127. DOI: 10.1021/acsomega.1c02414.
Feline Interleukin-31 Shares Overlapping Epitopes with the Oncostatin M Receptor and IL-31RA.
Medina-Cucurella A, Bammert G, Dunkle W, Javens C, Zhu Y, Mutchler V Biochemistry. 2020; 59(23):2171-2181.
PMID: 32459958 PMC: 7379511. DOI: 10.1021/acs.biochem.0c00176.
Interleukin-31, Interleukin-31RA, and OSMR Expression Levels in Post-burn Hypertrophic Scars.
Lee M, Shin E, Kim H, Kwak I, Choi Y J Pathol Transl Med. 2018; 52(5):307-313.
PMID: 30114861 PMC: 6166012. DOI: 10.4132/jptm.2018.08.03.