title: Production and characterization of thirteen human type-I interferon-α subtypes.
abstract: Thirteen human interferon-α (IFNα) subtypes were expressed in Escherichiacoli and purified using an N-terminal affinity tag from the prodomain of subtilisin. IFNα subtypes were expressed in soluble form and purified from cell lysates or refolded and purified from inclusion bodies. Proteins produced by either protocol exhibited biological activities equal to or greater than commercially prepared IFNα preparations. The IFNαs were used to produce an anti-IFNα16 antibody (MAb-1B12) that specifically neutralized the biological activity of IFNα16, but not the 12 other IFNαs. Using MAb-1B12, and a previously generated IFNAR1/IFNAR2-FChk heterodimer, an assay was developed to determine total type I IFN biological activity and IFNα16-derived biological activity in an unknown sample.
authors.affiliation: Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
authors.forename: Srilalitha
authors.initials: S
authors.lastname: Kuruganti
authors.affiliation: Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
authors.forename: Mary Ann
authors.initials: MA
authors.lastname: Accavitti-Loper
authors.affiliation: Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA. Electronic address: walter@uab.edu.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Walter
mesh_terms: D000911:Antibodies, Monoclonal / Q000096:biosynthesis / Q000276:immunology; D057134:Antibodies, Neutralizing / Q000096:biosynthesis / Q000276:immunology; D004926:Escherichia coli; D006801:Humans; D007370:Interferon Type I / Q000096:biosynthesis* / Q000276:immunology / Q000302:isolation & purification*; D016898:Interferon-alpha / Q000096:biosynthesis* / Q000276:immunology / Q000302:isolation & purification*
chemical_list: D000911:Antibodies, Monoclonal; D057134:Antibodies, Neutralizing; D007370:Interferon Type I; D016898:Interferon-alpha
keywords: Autoimmune disease; Interferon; Interferon subtype; Neutralizing antibodies; Protein purification