Process for purifying proteins in a hydrophobic interaction...

C - Chemistry – Metallurgy – 07 – K

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C07K 14/00 (2006.01) C12P 21/06 (2006.01)

Patent

CA 2542951

The present invention is a process for separating a target protein (such as a recombinant protein produced in a cell culture) from a mixture containing the target protein and contaminants (such as cell culture contaminants), by contacting the mixture with a hydrophobic adsorbent comprising branched hydrocarbon functional groups in an aqueous salt solution and collecting the unbound flow-through fraction containing the target protein. In one embodiment, the hydrophobic adsorbent may be a branched alkyl functional group. In another embodiment, the branched alkyl functional group has from 3 to 8 carbon atoms. In another embodiment, the branched alkyl functional group is a tertiary carbon atom, such as tert-butyl.

L'invention concerne un procédé de séparation d'une protéine cible (telle qu'une protéine recombinante produite dans une culture de cellules) d'un mélange renfermant la protéine cible et des contaminants (tels que des contaminants de culture de cellules) consistant à mettre en contact le mélange avec un adsorbant hydrophobe comprenant des groupes fonctionnels hydrocarbonés ramifiés dans une solution salée aqueuse et à recueillir la fraction à écoulement continu non liée renfermant la protéine cible. Dans un mode de réalisation, l'adsorbant hydrophobe peut être un groupe fonctionnel alkyle ramifié. Dans un autre mode de réalisation, le groupe fonctionnel alkyle ramifié comprend entre 3 et 8 atomes de carbone. Encore dans un autre mode de réalisation, le groupe fonctionnel alkyle ramifié est un atome de carbone tertiaire, tel que <i>tert-</i>butyl<i>.</i>

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