A COS-cell-based system for rapid production and quantification of scFv::IgC kappa antibody fragments.
Single-chain Fv (scFv) antibody (Ab) fragments were transiently produced in COS-1 cells utilizing a mammalian expression vector featuring a murine immunoglobulin (Ig) light-chain leader sequence for efficient secretion and a murine Ig kappa constant domain (IgC kappa) for detection. Several hundred milliliters of supernatants from large-scale COS cell transfections were sufficient to purify the scFv::IgC kappa fusion proteins by one-step affinity chromatography utilizing an immobilized rat anti-mouse IgC kappa monoclonal Ab. Furthermore, the murine IgC kappa domain allowed for accurate quantification of the scFv::IgC kappa fusion protein secreted into the COS cell supernatant by a sandwich enzyme-linked immunosorbent assay (S-ELISA).
Ridder
R
R
Preclinical Research, Sandoz Pharma Ltd., Basel, Switzerland.
Geisse
S
S
Kleuser
B
B
Kawalleck
P
P
Gram
H
H
D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D002522:Chlorocebus aethiops; D003001:Cloning, Molecular / Q000379:methods; D017931:DNA Primers / Q000737:chemistry; D015870:Gene Expression; D005803:Genes, Immunoglobulin / Q000235:genetics; D007135:Immunoglobulin Variable Region / Q000235:genetics*; D007145:Immunoglobulin kappa-Chains / Q000235:genetics*; D008969:Molecular Sequence Data; D011993:Recombinant Fusion Proteins
D017931:DNA Primers; D007135:Immunoglobulin Variable Region; D007145:Immunoglobulin kappa-Chains; D011993:Recombinant Fusion Proteins