Interleukin-1 (IL-1)-induced activation of the NFκB pathway is mediated through the IL-1 receptor and the subsequent phosphorylation of IL-1 receptor-associated kinase (IRAK). The myeloid differentiation protein MyD88 was originally characterized as a protein upregulated in myeloleukemic cells following IL-6-induced growth arrest and terminal differentiation. MyD88 is now known to function as an adaptor protein for the association of IRAK with the IL-1 receptor. MyD88 is functionally homologous to the adaptor protein tube in the Toll signaling pathway of Drosophilia, and both proteins are members of the Toll/IL-1R superfamily. MyD88 contains a characteristic N-terminal death domain that is essential for NFκB activation and an adjacent Toll/IL-1R homology domain (TIR domain). Collectively, these domains enable the protein-protein interactions of MyD88 with IRAK and the IL-1 receptor complex.
Background References
1. Kim, JE. et al. 2014. Paclitaxel-exposed ovarian cancer cells induce cancer-specific CD4+ T cells after doxorubicin exposure through regulation of MyD88 expression. International journal of oncology. 44: 1716-26.
2. Steinhagen, F. et al. 2013. IRF-5 and NF-κB p50 co-regulate IFN-β and IL-6 expression in TLR9-stimulated human plasmacytoid dendritic cells. Eur. J. Immunol. 43: 1896-1906.
Western blot analysis of MyD88 on different lysates with Rabbit anti-MyD88 antibody (HA723139) at 1/2,000 dilution.
Lane 1: RAW264.7 cell lysate Lane 2: NIH/3T3 cell lysate Lane 3: A20 cell lysate Lane 4: J774A.1 cell lysate Lane 5: NR8383 cell lysate Lane 6: C6 cell lysate Lane 7: PC-12 cell lysate Lane 8: A549 cell lysate Lane 9: HepG2 cell lysate Lane 10: COS-1 cell lysate Lane 11: Mouse liver tissue lysate Lane 12: Mouse spleen tissue lysate Lane 13: Rat liver tissue lysate Lane 14: Rat spleen tissue lysate
Lysates/proteins at 20 µg/Lane.
Predicted band size: 33 kDa Observed band size: 33 kDa
Exposure time: 1 minute; ECL: K1802;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA723139) at 1/2,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
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