title: Chemical mutagenesis of human interferon-beta: construction, expression in E. coli, and biological activity of sodium bisulfite-induced mutations.
abstract: A series of modified human interferon-beta (IFN-beta) genes was produced by sodium bisulfite treatment of the IFN-beta gene cloned in M13. A library of mutated sequences was generated from which subgenomic fragments containing one or a small number of coding alterations were isolated and substituted into the IFN-beta gene in an E. coli expression vector. A number of modified genes and their expression products were evaluated. In several instances levels of expression and biological activity profiles are altered compared to the parental gene product. A number of key amino acids can be identified, whose substitutions have marked effects on biological activity of IFN-beta.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002455:Cell Division / Q000187:drug effects; D003001:Cloning, Molecular; D003588:Cytopathogenic Effect, Viral / Q000187:drug effects; D004926:Escherichia coli / Q000235:genetics; D005786:Gene Expression Regulation; D006801:Humans; D007370:Interferon Type I / Q000096:biosynthesis / Q000235:genetics* / Q000494:pharmacology; D009154:Mutation; D013329:Structure-Activity Relationship; D013447:Sulfites
chemical_list: D007370:Interferon Type I; D013447:Sulfites; C009279:sodium bisulfite