Affinity polypeptide for purification of recombinant proteins

C - Chemistry – Metallurgy – 07 – K

Patent

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Details

C07K 19/00 (2006.01) C12N 15/00 (2006.01) C12N 15/62 (2006.01) C12N 15/63 (2006.01) C07K 1/22 (2006.01)

Patent

CA 2641372

The present disclosure provides an affinity polypeptide for the purification of a recombinant biologically active protein or polypeptide. Further, the present disclosure provides a fusion recombinant protein or polypeptide wherein the fusion recombinant protein comprises of at least two components, a biologically active polypeptide or protein or protein of interest and the affinity polypeptide. The biologically active polypeptide may be linked directly or indirectly to the affinity polypeptide by covalent binding. The present disclosure provides a recombinant expression vector for the producing said fusion recombinant protein in host cells. Further, the present disclosure provides an improved method of purification of recombinant protein from the host cells. Further, the disclosure provides a method of purification of the recombinant biologically active polypeptide or protein by immobilized metal ion chelating chromatography.

La présente invention concerne un polypeptide d'affinité pour la purification de protéines ou de polypeptides recombinants biologiquement actifs. En outre, l'invention concerne une protéine de fusion recombinante ou un polypeptide recombinant, la protéine de fusion recombinante étant constituée d'au moins deux composants, une protéine ou un polypeptide biologiquement actif ou une protéine d'intérêt et le polypeptide d'affinité. Le polypeptide biologiquement actif peut être lié directement ou indirectement au polypeptide d'affinité par une liaison covalente. L'invention concerne également un vecteur d'expression recombinant pour produire ladite protéine de fusion recombinante dans des cellules hôtes. Elle concerne en outre un procédé amélioré de purification de la protéine recombinante à partir des cellules hôtes, ainsi qu'un procédé de purification de la protéine ou du polypeptide recombinant biologiquement actif par chromatographie par chélation d'ions métalliques immobilisés.

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