Interferon receptor recognition peptides enhance the biological potency of interferon alphas

FEBS Letters

Fish, E.N.¹ 

[1] Department of Microbiology, University of Toronto, FitzGerald Bldg., 150 College Street, Toronto, Ont., M5S 1A8, Canada

关键词: Interferon-α;    Receptor;    IFN-α;    IRRP;    STAT;    ISGF3;    IFNAR1;    IFNABR;   

DOI  :  10.1016/0014-5793(95)00422-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Based on our earlier studies that defined three strategic regions in the Type 1 interferon (IFN) molecule associated with receptor interactions and biological activity, three IFN receptor recognition peptides (IRRP) were synthesized, with amino acid sequences CLKDRHD (IRRP) were synthesized, with amino (IRRP2) and YFQRITLYLTEKKYSPCA (IRRP3) and examined for biological effectiveness. In cell surface receptor binding studies, the binding capacity of cells for IFN-αs was increased in the presence of the IRRPs. Increased receptor occupancy resulted in increased phosphorylation-activation of the transcription factor ISGF3 and enhanced antiviral activity. The potentiating effect on IFN-induced growth inhibition was less marked. These data suggest that the IRRPs may influence the biological potency of IFN-α by facilitating accessibility to cell surface receptor components. The IRRPs may function to increase the number of low affinity receptor-ligand interactions necessary to initiate receptor oligomerization, thereby catalysing the formation of high IFN-receptor complexes.

【 授权许可】

Unknown