METHOD FOR PRODUCING PROTEINS IN PICHIA PASTORIS THAT LACK DETECTABLE CROSS BINDING ACTIVITY TO ANTIBODIES AGAINST HOST CELL ANTIGENS
摘要
Methods for producing proteins and glycoproteins in Pichia pastoris that lack detectable cross binding activity to antibodies made against host cell antigens are described. In particular, methods are described wherein recombinant Pichia pastoris strains that do not display a &bgr;-mannosyltransferase 2 activity with respect to an N-glycan or O-glycan and do not display at least one activity selected from a &bgr;-mannosyltransferase 1, 3, and 4 activity to produce recombinant proteins and glycoproteins. These recombinant Pichia pastoris strains can produce proteins and glycoproteins that lack detectable α-mannosidase resistant &bgr;-mannose residues thereon and thus, lack cross binding activity to antibodies against host cell antigens. Further described are methods for producing bi-sialylated human erythropoietin in Pichia pastoris that lack detectable cross binding activity to antibodies against host cell antigens.
申请公布号
EP2488657(A4)
申请公布日期
2013.10.30
申请号
EP20100823888
申请日期
2010.10.11
申请人
MERCK SHARP & DOHME CORP.
发明人
BOBROWICZ, PIOTR;GOMATHINAYAGAM, SUJATHA;HAMILTON, STEPHEN;LI, HUIJUAN;SETHURAMAN, NATARAJAN;STADHEIM, TERRANCE, A.;WILDT, STEFAN