[EN] METHODS FOR MAKING CONJUGATES FROM DISULFIDE-CONTAINING PROTEINS<br/>[FR] PROCÉDÉS POUR LA FABRICATION DE CONJUGUÉS À PARTIR DE PROTÉINES CONTENANT DU DISULFURE
申请人:NOVARTIS AG
公开号:WO2014083505A1
公开(公告)日:2014-06-05
The invention provides methods to prepare protein conjugates from proteins having at least two cysteines. In one embodiment, a protein with a disulfide linkage is reduced to provide two free cysteines for reaction with a 1,3-dihaloacetone or similar reactant, linking the sulfur atoms of the two cysteines together. The ketone inserted between the sulfur atoms is then used to form a Schiff base to an aminated payload molecule, thus conjugating the protein to a payload. In another embodiment, two cysteine residues are tied together by reaction with a 1,3-dihaloacetone or similar reactant. The linkage between the sulfur atoms in each case holds the protein or peptide in a constrained conformation, while also providing a convenient place for attaching a payload with good specificity and efficiency.