title: Expression of biologically active human interleukin 1 subpeptides by transfected simian COS cells.
abstract: "Interleukin 1" (IL-1) is a term used to describe the family of macrophage-derived proteins that mediate many immune and inflammatory reactions. We have previously described the molecular cloning and sequencing of the cDNA encoding the predominant (neutral) form of human IL-1, which has been designated IL-1 beta. We report here that transfection of simian COS cells with this cDNA clone results in the transcription of IL-1 mRNA and the synthesis of antibody-neutralizable intracellular IL-1 biological activity. In addition, selective deletion of regions of the IL-1 cDNA judged not to be essential for function, on the basis of conserved sequence homology, resulted in localization of a "core" region responsible for a majority of the biological activity. These results permit mapping the active site of IL-1 to a peptide of 6970 molecular weight located within the carboxyl third (between Met-136 and Gln-197) of the IL-1 precursor.
mesh_terms: D000818:Animals; D002460:Cell Line; D002522:Chlorocebus aethiops; D004247:DNA; D006801:Humans; D007375:Interleukin-1 / Q000096:biosynthesis* / Q000235:genetics / Q000494:pharmacology; D007668:Kidney; D008213:Lymphocyte Activation; D012333:RNA, Messenger / Q000032:analysis; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000235:genetics / Q000494:pharmacology; D014162:Transfection
chemical_list: D007375:Interleukin-1; D012333:RNA, Messenger; D011994:Recombinant Proteins; D004247:DNA