Method for inactivating viruses by addition of slightly acidic arginine
申请人:Ajinomoto Co., Inc.
公开号:EP1958626A1
公开(公告)日:2008-08-20
The present invention provides a method for conveniently producing a protein formulation with viruses being inactivated, without impairing the quality of the obtained protein formulation, characterized by including the step of exposing the protein formulation contaminated with the viruses to a 0.1-2M aqueous solution of arginine, an arginine derivative or a mixture thereof, the aqueous solution being adjusted to pH 3.5 to 5. The present invention also provides a virus inactivation method characterized by including the step of bringing a virus-containing object into contact with a 0.1-2M aqueous solution of arginine, a arginine derivative or a mixture thereof, the aqueous solution being adjusted to pH 3.5 to 5.
The present invention provides a method for producing a protein which has restored a higher-order structure of a native state thereof: by bringing the protein which has lost a higher-order structure thereof into contact at pH 6.5 to 9.0 to a 1 to 3% aqueous solution of a specific surfactant, such as lauroylglutamic acid to obtain a solubilized solution of the protein; and adding the obtained solubilized solution to a buffer with pH 6.5 to 9.0 containing arginine or an arginine derivative at a level of 0.1 to 1.2 M to lower the concentration of the specific surfactant, such as lauroylglutamic acid, in an obtained mixture solution down to 0.02 to 0.275%. According to the present invention, it is possible to easily restore a higher-order structure of a native state of a protein while smoothly detaching a surfactant from the protein.
METHOD FOR PREPARING POLYMERIC PROTEIN COMPOSED OF MONOMERIC PROTEIN PRODUCED BY FUSING PROTEIN HAVING IMMUNOGLOBULIN FOLD STRUCTURE TO PROTEIN CAPABLE OF SERVING AS SUBUNIT STRUCTURE
申请人:Ajinomoto Co., Inc.
公开号:EP2725104A1
公开(公告)日:2014-04-30
The present invention provides a method for producing a multimeric protein consisting of a monomeric protein obtained by fusing a protein having an immunoglobulin fold structure to a protein that can serve as a subunit structure, the method including the steps of:
(A) preparing the monomeric protein having an insoluble granular form in cells of a microorganism;
(B) solubilizing the monomeric protein prepared in step (A) with an aqueous solution containing lauroyl-L-Glu;
(C) diluting a solution obtained in step (B) in a buffer containing arginine hydrochloride to lower a concentration of lauroyl-L-Glu; and
(D) replacing a solvent of a solution obtained in step (C) with a buffer using gel filtration chromatography or the like.
The invention provides a washing method for affinity chromatography in which a wash solution comprising arginine, or an arginine derivative, and a nonbuffering salt, preferably at high pH, greater than 8.0, is effective in removing impurities, such as high molecular weight species and host cell proteins, while also increasing product concentration in the eluate and maintaining a high percent yield of recovered product.
METHOD FOR PRODUCING REFOLDED PROTEIN BY USING FLOW MICROREACTOR, AND PROTEIN REFOLDING APPARATUS
申请人:AJINOMOTO CO., INC.
公开号:EP3878856A1
公开(公告)日:2021-09-15
The present invention provides a method for producing a refolded protein, the method comprising a step for mixing, inside a micro mixer, a buffer and a solubilization solution for a protein that has lost higher order structure or that has become insoluble.