XTEN conjugate compositions and methods of making same
First Claim
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1. A composition comprising a homogeneous population of polypeptides comprising an extended recombinant polypeptide (XTEN), wherein at least 90% of individual polypeptide molecules in said population have an identical sequence length, wherein the XTEN is characterized in that:
- (a) the XTEN is 36 to 3000 L-amino acid residues in length;
(b) the sum of glycine (G), alanine (A), serine (S), threonine (T), glutamate (E) and proline (P) residues constitutes more than 90% of the total amino acid residues of the XTEN; and
(c) the XTEN sequence comprises one or more sequence motifs selected from SEQ ID NOs;
26-55 and one or more sequence motifs selected from SEQ ID NOs;
399-407;
wherein the polypeptides of the population have a configuration of formula II;
(HS)-(CS1)-(XTEN)-(CS2)-(AT1)
IIwherein(i) HS is a sequence having at least 90% sequence identity to a sequence selected from SEQ ID NOs;
517-526;
(ii) AT1 is a first affinity tag having an amino acid sequence exhibiting binding affinity for a chromatography substrate selected from the group consisting of hydrophobic interaction chromatography (HIC) substrate, cation exchange substrate, anion exchange substrate, immobilized metal ion affinity chromatography (IMAC) substrate, and immobilized antibody substrate;
(iii) CS1 is a first amino acid sequence capable of being cleaved by trypsin;
(iv) CS2 is a second amino acid sequence capable of being cleaved by trypsin; and
(v) XTEN is the extended recombinant polypeptide.
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Abstract
The present invention relates to extended recombinant polypeptide (XTEN) compositions, conjugate compositions comprising XTEN and XTEN linked to cross-linkers useful for conjugation to pharmacologically active payloads, methods of making highly purified XTEN, methods of making XTEN-linker and XTEN-payload conjugates, and methods of using the XTEN-cross-linker and XTEN-payload compositions.
59 Citations
24 Claims
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1. A composition comprising a homogeneous population of polypeptides comprising an extended recombinant polypeptide (XTEN), wherein at least 90% of individual polypeptide molecules in said population have an identical sequence length, wherein the XTEN is characterized in that:
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(a) the XTEN is 36 to 3000 L-amino acid residues in length; (b) the sum of glycine (G), alanine (A), serine (S), threonine (T), glutamate (E) and proline (P) residues constitutes more than 90% of the total amino acid residues of the XTEN; and (c) the XTEN sequence comprises one or more sequence motifs selected from SEQ ID NOs;
26-55 and one or more sequence motifs selected from SEQ ID NOs;
399-407;wherein the polypeptides of the population have a configuration of formula II;
(HS)-(CS1)-(XTEN)-(CS2)-(AT1)
IIwherein (i) HS is a sequence having at least 90% sequence identity to a sequence selected from SEQ ID NOs;
517-526;(ii) AT1 is a first affinity tag having an amino acid sequence exhibiting binding affinity for a chromatography substrate selected from the group consisting of hydrophobic interaction chromatography (HIC) substrate, cation exchange substrate, anion exchange substrate, immobilized metal ion affinity chromatography (IMAC) substrate, and immobilized antibody substrate; (iii) CS1 is a first amino acid sequence capable of being cleaved by trypsin; (iv) CS2 is a second amino acid sequence capable of being cleaved by trypsin; and (v) XTEN is the extended recombinant polypeptide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification