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    • 6. 发明专利
    • Variants of activin iib receptor polypeptides and uses thereof
    • NZ604818A
    • 2014-07-25
    • NZ60481809
    • 2009-11-24
    • AMGEN INC
    • TAM LEI-TING TONYMICHAELS MARK LEOSUN JEONGHOONBOONE THOMAS CDESHPANDE ROHINILI YUE-SHENGHAN HQ
    • C07K14/705C07K14/71C07K14/72
    • Disclosed is an isolated protein comprising a stabilised activin IIB receptor polypeptide, wherein said polypeptide is selected from the group consisting of: (a) a polypeptide consisting of an amino acid sequence set forth in the group consisting of SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 12 and SEQ ID NO: 14; (b) a polypeptide having at least 90 % sequence identity to (a), wherein the polypeptide has a W or a Y at a position corresponding to position 28 of an amino acid sequence set forth in SEQ ID NO: 2 and a T at a position corresponding to position 44 of the amino acid sequence set forth in SEQ ID NO:2, wherein the polypeptide is capable of binding myostatin, activin A, or GDF-11, and (c) a polypeptide having at least 95 % sequence identity to (a), wherein the polypeptide has a W or a Y at a position corresponding to position 28 of the amino acid sequence set forth in SEQ ID NO: 2 and a T at a position corresponding to position 44 of the amino acid sequence set forth in SEQ ID NO:2, wherein the polypeptide is capable of binding myostatin, activin A, or GDF-11;wherein the sequences are disclosed in the specification. Also disclosed is a method of producing the above mentioned stabilised activin IIB receptor (svActRIIB) protein and the use of the protein in the manufacture of a medicament for increasing lean muscle mass.