Nova Patents
AU723397B2

Recombinant toxin fragments

Abstract

This record has no abstract on file.

AU723397B2, drawing sheet 1
Sheet 1 of 17

Term

Term ended

Expired 22 August 2017, 9.1 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

48 claims: 10 independent, 38 dependent

  1. 1
    115 CLAIMS 1. A polypeptide comprising first and second domains, wherein said first domain is adapted to cleave one or more vesicle or plasmamembrane associated proteins essential to exocytosis, said second domain is adapted (i) to translocate the polypeptide into a cell or (ii) to increase the solubility of the polypeptide compared to the solubility of the first domain on its own or (iii) both to translocate the polypeptide into a cell and to increase the solubility of the polypeptide compared to the solubility of the first domain on its own, said polypeptide is free of clostridial neurotoxin and free of clostridial neurotoxin precursor that can be converted into toxin by proteolytic action, and • ·· said polypeptide is a single polypeptide. • · · · • · · “ • · · .·*··.
  2. 7
    A polypeptide according to any of Claims 1 -5 wherein said second domain clostridial toxin heavy chain H N portion. 116
  3. 9
    A polypeptide according to any of Claims 1-8 further comprising a third domain adapted for binding of the polypeptide to a cell, by binding of the third domain directly to a cell or by binding of the third domain to a ligand or to ligands that bind to a cell.
  4. 16
    18. A polypeptide according to any of Claims 1-13 comprising a botulinum toxin light chain or a fragment or a v’ariant of a botulinum toxin light chain and at least 100 N-terminal amino acids of a botulinum toxin heavy chain.
  5. 23
    25. A polypeptide according to any of Claims 14-24 lacking a portion designated of a botulinum toxin heavy chain. A ft) 118
  6. 28
    30. A fusion protein comprising a fusion of (a) a polypeptide according to any j*”*· of Claims 1-29 with (b) a second polypeptide being a polypeptide or oligopeptide adapted for binding to an affinity matrix so as to enable purification of the fusion ·«·· :Γ: protein using said matrix. ·«·· j 31 a fusion protein according to Claim 30 wherein said second polypeptide is CM adapted to bind to a chromatography column, such as an affinity matrix of glutathione Sepharose. 119
  7. 35
    40. A nucleic acid according to Claim 37 and comprising nucleotides encoding residues 1-470 of a botulinum toxin type B light chain.
  8. 36
    41. A nucleic acid according to Claim 37 or 40 comprising nucleotides encoding residues 1-417 of a botulinum toxin type B heavy chain H N domain.
  9. 37
    42. A nucleic acid according to any of Claims 37-41 comprising nucleotides encoding a restriction endonuclease cleavage site not present in native clostridial toxin sequence.
  10. 39
    44. A DNA according to any of claims 37-43.
  11. 40
    45. A DNA selected from SEQ ID No:s 1,8, 10, 12, 14, 16, 18, 23 and 24.
  12. 41
    46. A method of manufacture of a polypeptide according to any of Claims 1-29 comprising expressing in a host cell a nucleic acid according to any of Claims^ 3745 and recovering the polypeptide. 4 7 A method of manufacture of a polypeptide according to any of Claims comprising expressing in a host cell a nucleic acid encoding a fusion protein according to Claim 30, 31 or 32 purifying the fusion protein by eluting the fusion protein through an affinity matrix adapted to retain the fusion protein and eluting through said matrix a ligand adapted to displace the fusion protein, and recovering the fusion protein. 121
  13. 42
    48. A method of manufacture according to Claims 46 or 47 in which the nucleic acid is DNA.
  14. 43
    49. A cell expressing a polypeptide or fusion protein according to any of 5 Claims 1-32.