Modified human four helical bundle polypeptides and their uses
First Claim
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1. An isolated four helical bundle (4HB) polypeptide chosen from the group consisting of human growth hormone, interferon, erythropoietin, and granulocyte cell stimulating factor, comprising a ribosomally incorporated para-acetylphenylalanine wherein said para-acetylphenylalanine is substituted at the C-terminus, wherein the 4HB polypeptide with a non-naturally encoded amino acid has at least a 2-fold increased serum half-life over the wild type 4HB polypeptide.
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Abstract
Modified human four helical bundle (4HB) polypeptides and uses thereof are provided.
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18 Claims
- 1. An isolated four helical bundle (4HB) polypeptide chosen from the group consisting of human growth hormone, interferon, erythropoietin, and granulocyte cell stimulating factor, comprising a ribosomally incorporated para-acetylphenylalanine wherein said para-acetylphenylalanine is substituted at the C-terminus, wherein the 4HB polypeptide with a non-naturally encoded amino acid has at least a 2-fold increased serum half-life over the wild type 4HB polypeptide.
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