Single amino acid changes that render human IFN-alpha 2 biologically active on mouse cells - PubMed (original) (raw)
Single amino acid changes that render human IFN-alpha 2 biologically active on mouse cells
H Weber et al. EMBO J. 1987 Mar.
Abstract
Human IFN-alpha 1 and IFN-alpha 2 differ in 28 of 166 amino acids and show very different specific antiviral activities on human and murine cells. We have identified, by hybrid scanning and site-directed mutagenesis, three residues in IFN-alpha 2, in positions 121, 125 and 132 which, when replaced individually or jointly by their IFN-alpha 1 counterparts, modify its activity on mouse cells by up to 400-fold. We argue that these residues are involved in direct contacts with the mouse interferon receptor.
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