Method For Producing Antibodies
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Abstract
A novel method for expression of immunoglobulines is devised.
38 Citations
75 Claims
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1-57. -57. (canceled)
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58. Method for producing an immunoglobulin having Fc receptor activity and/or complement activation activity which immunoglobulin molecule when secreted from a vertebrate host cell comprises at least a first and a second polypeptide chain wherein the first polypeptide is an Ig-Light Chain (L) comprising at least a VL and a CL domain and in that the second polypeptide is an Ig-Heavy Chain (H) comprising at least a VH, CH2 and CH3 domain and a hinge domain, comprising the steps of
a. expressing in a vertebrate host cell having Golgi-only or late-Golgi-only resident furin family endoprotease activity a fusion polypeptide comprising a secretion targeting sequence directing the polypeptide to the secretory pathway and further comprising at least the said first and second polypeptide sequences and at least one cleavage site for the said endoprotease activity and wherein the fusion polypeptide comprises the sequences of said first and second polypeptide separated by a linker and b. having the fusion polypeptide cleaved in the cells by the furin family endoprotease activity into the first and second polypeptide chains and c. harvesting the secreted immunoglobulin.
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75. Method for producing an immunoglobulin having Fc receptor activity and/or complement activation activity which immunoglobulin molecule when secreted from a vertebrate host cell comprises at least a first and a second polypeptide chain wherein the first polypeptide is an Ig-Light Chain (L) comprising at least a VL and a CL domain and in that the second polypeptide is an Ig-Heavy Chain (H) comprising at least a a VH, CH2 and CH3 domain and a hinge domain, comprising the steps of
a. expressing in a vertebrate host cell having Golgi-only or late-Golgi-only resident subtilisin/kexin family endoprotease activity a fusion polypeptide comprising a secretion targeting sequence directing the polypeptide to the secretory pathway and further comprising at least the first and second polypeptide sequences and at least one cleavage site for the said endoprotease activity and wherein the fusion polypeptide comprises the sequences of said first and second polypeptide separated by a linker, and b. having the fusion polypeptide cleaved in the cells by the subtilisin/kexin family endoprotease activity into the first and second polypeptide chains and c. harvesting the secreted immunoglobulin.
Specification