| Structural highlights
Disease
[I12R1_HUMAN] Primary biliary cholangitis;Mendelian susceptibility to mycobacterial diseases due to complete IL12RB1 deficiency. The disease is caused by variants affecting the gene represented in this entry.
Function
[I12R1_HUMAN] Functions as an interleukin receptor which binds interleukin-12 with low affinity and is involved in IL12 transduction. Associated with IL12RB2 it forms a functional, high affinity receptor for IL12. Associates also with IL23R to form the interleukin-23 receptor which functions in IL23 signal transduction probably through activation of the Jak-Stat signaling cascade.[1]
Publication Abstract from PubMed
Interleukin-12 (IL-12) and IL-23 are heterodimeric cytokines that are produced by antigen-presenting cells to regulate the activation and differentiation of lymphocytes, and they share IL-12Rbeta1 as a receptor signaling subunit. We present a crystal structure of the quaternary IL-23 (IL-23p19/p40)/IL-23R/IL-12Rbeta1 complex, together with cryoelectron microscopy (cryo-EM) maps of the complete IL-12 (IL-12p35/p40)/IL-12Rbeta2/IL-12Rbeta1 and IL-23 receptor (IL-23R) complexes, which reveal "non-canonical" topologies where IL-12Rbeta1 directly engages the common p40 subunit. We targeted the shared IL-12Rbeta1/p40 interface to design a panel of IL-12 partial agonists that preserved interferon gamma (IFNgamma) induction by CD8(+) T cells but impaired cytokine production from natural killer (NK) cells in vitro. These cell-biased properties were recapitulated in vivo, where IL-12 partial agonists elicited anti-tumor immunity to MC-38 murine adenocarcinoma absent the NK-cell-mediated toxicity seen with wild-type IL-12. Thus, the structural mechanism of receptor sharing used by IL-12 family cytokines provides a protein interface blueprint for tuning this cytokine axis for therapeutics.
Structural basis for IL-12 and IL-23 receptor sharing reveals a gateway for shaping actions on T versus NK cells.,Glassman CR, Mathiharan YK, Jude KM, Su L, Panova O, Lupardus PJ, Spangler JB, Ely LK, Thomas C, Skiniotis G, Garcia KC Cell. 2021 Feb 18;184(4):983-999.e24. doi: 10.1016/j.cell.2021.01.018. PMID:33606986[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Parham C, Chirica M, Timans J, Vaisberg E, Travis M, Cheung J, Pflanz S, Zhang R, Singh KP, Vega F, To W, Wagner J, O'Farrell AM, McClanahan T, Zurawski S, Hannum C, Gorman D, Rennick DM, Kastelein RA, de Waal Malefyt R, Moore KW. A receptor for the heterodimeric cytokine IL-23 is composed of IL-12Rbeta1 and a novel cytokine receptor subunit, IL-23R. J Immunol. 2002 Jun 1;168(11):5699-708. PMID:12023369
- ↑ Glassman CR, Mathiharan YK, Jude KM, Su L, Panova O, Lupardus PJ, Spangler JB, Ely LK, Thomas C, Skiniotis G, Garcia KC. Structural basis for IL-12 and IL-23 receptor sharing reveals a gateway for shaping actions on T versus NK cells. Cell. 2021 Feb 18;184(4):983-999.e24. doi: 10.1016/j.cell.2021.01.018. PMID:33606986 doi:http://dx.doi.org/10.1016/j.cell.2021.01.018
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