Methods for production of unstructured recombinant polymers and uses thereof
First Claim
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1. A method of producing a protein comprising an unstructured recombinant polymer (URP), comprising:
- (i) providing a host cell comprising a recombinant polynucleotide encoding the protein, said protein comprising one or more URP, said URP comprising at least 40 contiguous amino acids, wherein said URP is substantially incapable of non-specific binding to a serum protein, and wherein(a) the sum of glycine (G), aspartate (D), alanine (A), serine (S), threonine (T), glutamate (E) and proline (P) residues contained in the URP, constitutes more than about 80% of the total amino acids of the URP; and
/or(b) at least 50% of the amino acids are devoid of secondary structure as determined by Chou-Fasman algorithm;
(ii) culturing said host cell in a suitable culture medium under conditions to effect expression of said protein from said polynucleotide.
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Abstract
The present invention provides unstructured recombinant polymers (URPs) and proteins containing one or more of the URPs. The present invention also provides microproteins, toxins and other related proteinaceous entities, as well as genetic packages displaying these entities. The present invention also provides recombinant polypeptides including vectors encoding the subject proteinaceous entities, as well as host cells comprising the vectors. The subject compositions have a variety of utilities including a range of pharmaceutical applications.
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25 Claims
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1. A method of producing a protein comprising an unstructured recombinant polymer (URP), comprising:
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(i) providing a host cell comprising a recombinant polynucleotide encoding the protein, said protein comprising one or more URP, said URP comprising at least 40 contiguous amino acids, wherein said URP is substantially incapable of non-specific binding to a serum protein, and wherein (a) the sum of glycine (G), aspartate (D), alanine (A), serine (S), threonine (T), glutamate (E) and proline (P) residues contained in the URP, constitutes more than about 80% of the total amino acids of the URP; and
/or(b) at least 50% of the amino acids are devoid of secondary structure as determined by Chou-Fasman algorithm; (ii) culturing said host cell in a suitable culture medium under conditions to effect expression of said protein from said polynucleotide. - View Dependent Claims (2, 3, 4, 5, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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6. A method of increasing serum secretion half-life of a protein, comprising:
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fusing said protein with one or more unstructured recombinant polymers (URPs), wherein the URP comprises at least about 40 contiguous amino acids, and wherein (a) the sum of glycine (G), aspartate (D), alanine (A), serine (S), threonine (T), glutamate (E) and proline (P) residues contained in the URP, constitutes more than about 80% of the total amino acids of the URP; and
/or(b) at least 50% of the amino acids are devoid of secondary structure as determined by Chou-Fasman algorithm; and
wherein said URP is substantially incapable of non-specific binding to a serum protein. - View Dependent Claims (7)
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8. A method of detecting the presence or absence of a specific interaction between a target and an exogenous protein that is displayed on a genetic package, wherein said protein comprises one or more unstructured recombinant polymer (URP), the method comprising:
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(a) providing a genetic package displaying a protein that comprises one or more unstructured recombinant polymers (URPs); (b) contacting the genetic package with the target under conditions suitable to produce a stable protein-target complex; and (c) detecting the formation of the stable protein-target complex on the genetic package, thereby detecting the presence of a specific interaction. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification