title: Nucleotide sequence of human monocyte interleukin 1 precursor cDNA.
abstract: Interleukin 1 (IL-1) is a protein with several biological activities regulating host defense and immune responses. We report here the isolation of human IL-1 cDNA. It encodes a precursor polypeptide of 269 amino acids (30,747 Mr). mRNA isolated by hybridization to this cDNA was translated in a reticulocyte cell-free system, yielding immunoprecipitable IL-1. Furthermore, this hybrid-selected mRNA was injected into Xenopus laevis oocytes, which subsequently secreted biologically active IL-1. The cDNA nucleotide sequence suggests that IL-1 is initially translated as a precursor molecule that is subsequently processed into the 15,000-20,000 Mr protein usually associated with IL-1 activity.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000032:analysis*; D004262:DNA Restriction Enzymes; D006801:Humans; D007375:Interleukin-1 / Q000235:genetics*; D009000:Monocytes / Q000276:immunology*; D011061:Poly A / Q000235:genetics; D014176:Protein Biosynthesis; D011498:Protein Precursors / Q000235:genetics*; D012313:RNA / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D011817:Rabbits; D012156:Reticulocytes / Q000378:metabolism; D014158:Transcription, Genetic
chemical_list: D007375:Interleukin-1; D011498:Protein Precursors; D012333:RNA, Messenger; C043830:interleukin 1 precursor; D011061:Poly A; D012313:RNA; D004247:DNA; D004262:DNA Restriction Enzymes