title: Expression in Escherichia coli of synthetic human interleukin-1 alpha genes encoding the processed active protein, mutant proteins, and beta-galactosidase fusion proteins.
abstract: We have synthesized, cloned, and expressed the coding region for the C-terminal 159 amino acids (aa) of the human active interleukin polypeptide hormone IL-1 alpha. The sequence was assembled in stages and includes preferred Escherichia coli codons and unique restriction sites. The coding region was cloned on a multicopy plasmid vector adjacent to signals for transcription and translation that directed synthesis of 6% of total E. coli protein as IL-1 alpha. Active IL-1 alpha mutants that have a C-terminal additional eleven aa and that have N-terminal deletions of six and fourteen aa are described. Plasmids expressing beta-galactosidase fusion proteins with various parts of IL-1 alpha at their N-termini were constructed.
mesh_terms: D001483:Base Sequence; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics*; D005696:Galactosidases / Q000235:genetics*; D005796:Genes; D005798:Genes, Bacterial; D005813:Genes, Synthetic; D006801:Humans; D007375:Interleukin-1 / Q000235:genetics*; D009154:Mutation; D014176:Protein Biosynthesis; D014158:Transcription, Genetic; D001616:beta-Galactosidase / Q000235:genetics*
chemical_list: D007375:Interleukin-1; D005696:Galactosidases; D001616:beta-Galactosidase