Targeted therapeutic proteins
First Claim
Patent Images
1. A deglycosylated targeted therapeutic fusion protein comprising:
- a lysosomal enzyme; and
a lysosomal targeting domain that binds the human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner;
wherein the lysosomal targeting domain is mature human IGF-II or a mutein of human IGF-II having an amino acid sequence at least 70% identical to mature human IGF-II.
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Abstract
Targeted therapeutics that localize to a specific subcellular compartment such as the lysosome are provided. The targeted therapeutics include a therapeutic agent and a targeting moiety that binds a receptor on an exterior surface of the cell, permitting proper subcellular localization of the targeted therapeutic upon internalization of the receptor. Nucleic acids, cells, and methods relating to the practice of the invention are also provided.
92 Citations
27 Claims
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1. A deglycosylated targeted therapeutic fusion protein comprising:
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a lysosomal enzyme; and a lysosomal targeting domain that binds the human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner; wherein the lysosomal targeting domain is mature human IGF-II or a mutein of human IGF-II having an amino acid sequence at least 70% identical to mature human IGF-II. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A deglycosylated targeted therapeutic fusion protein comprising:
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a lysosomal enzyme, and a mutein of mature human IGF-II that binds human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner, wherein the mutein differs from mature human IGF-II only by a deletion or a replacement of amino acids 1-7. - View Dependent Claims (19, 20, 21, 22)
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23. A deglycosylated targeted therapeutic fusion protein comprising:
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a lysosomal enzyme, and a mutein of mature human IGF-II that binds human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner, wherein the mutein differs from mature human IGF-II only by a deletion or a replacement of amino acids 62-67.
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24. A deglycosylated targeted therapeutic fusion protein comprising:
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a lysosomal enzyme, and a mutein of mature human IGF-II that binds human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner, wherein the mutein differs from mature human IGF-II only by a deletion or a replacement of amino acids 29-40.
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25. A deglycosylated targeted therapeutic fusion protein comprising:
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a lysosomal enzyme, and a mutein of mature human IGF-II that binds human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner, wherein the mutein differs from mature human IGF-II only by an amino acid substitution selected from the group consisting of Tyr27Leu, Leu43Val, and Ser26Phe.
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26. A deglycosylated targeted therapeutic fusion protein comprising:
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a lysosomal enzyme, and a mutein of mature human IGF-II that binds human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner, wherein the mutein differs from mature human IGF-II only by a deletion or a replacement of amino acids 1-7 and a substitution of Tyr27Leu.
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27. A deglycosylated targeted therapeutic fusion protein comprising:
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a lysosomal enzyme, and a mutein of mature human IGF-II that binds human cation-independent mannose-6-phosphate receptor in a mannose-6-phosphate-independent manner, wherein the mutein differs from mature human IGF-II only at a position selected from the group consisting of amino acid 9, amino acid 19, amino acid 26, and amino acid 27.
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Specification