Fc fusion proteins comprising novel linkers or arrangements
The application provides Fc fusion proteins having novel arrangements. In one embodiment, the application provides Fc fusion proteins comprising a 10 Fn3 domain. In another embodiment, the application provides Fc fusion proteins comprising linkers derived from the naturally occurring C-terminal tail regions of membrane bound or secretory immunoglobulins.
1. A polypeptide comprising an immunoglobulin IgG Fc domain and a heterologous polypeptide, wherein the heterologous polypeptide is fused to the N-terminus or the C-terminus of the Fc domain by a polypeptide linker, wherein the polypeptide linker comprises an amino acid sequence selected from the group consisting of SEQ ID NOs: 51-54, 63-65 and 84.
2. The polypeptide of claim 1 , wherein the polypeptide linker comprises SEQ ID NO: 84.
3. The polypeptide of claim 1 , wherein the heterologous polypeptide is fused to the C-terminus of the Fc domain.
4. The polypeptide of claim 1 , wherein the heterologous polypeptide is fused to the N-terminus of the Fc domain.
5. The polypeptide of claim 1 , wherein the heterologous polypeptide comprises a 10 Fn3 domain.
6. The polypeptide of claim 1 , wherein the immunoglobulin Fc domain comprises a hinge or a portion thereof.
7. The polypeptide of claim 1 , wherein the polypeptide linker consists of an amino acid sequence selected from the group consisting of SEQ ID NOs: 51-54, 63-65 and 84.