Generation of affinity matured scFv antibodies against mouse neural cell adhesion molecule L1 by phage display
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Generation of affinity matured scFv antibodies against mouse neural cell adhesion molecule L1 by phage display. / Dong, Ling; Chen, Suzhen; Bartsch, Udo; Schachner, Melitta.
in: BIOCHEM BIOPH RES CO, Jahrgang 301, Nr. 1, 31.01.2003, S. 60-70.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Generation of affinity matured scFv antibodies against mouse neural cell adhesion molecule L1 by phage display
AU - Dong, Ling
AU - Chen, Suzhen
AU - Bartsch, Udo
AU - Schachner, Melitta
PY - 2003/1/31
Y1 - 2003/1/31
N2 - The recognition molecule L1 plays important functional roles in the nervous system and in non-neural tissues. Since antibodies to L1 are of prime importance to study its functional properties, we have generated affinity matured human single chain variable fragment (scFv) antibodies against mouse L1 by introducing random mutations in the complementarity determining regions (CDRs) of a previously isolated scFv antibody heavy chain (CDR1 and CDR2) and light chain (CDR3). After biopanning the mutant library, a clone (5F7) that gave the strongest ELISA signal was expressed, purified, and characterized. The dissociation constant of 5F7 (2.86 x 10(-8)M) was decreased 60-fold compared to the wild type clone G6 (1.72 x 10(-6)M). 5F7 detected L1 by Western blot analysis in mouse brain homogenates and recognized L1 in L1 transfected cells and cryosections from mouse retina and optic nerve by immunofluorescence. Bivalent 5F7 scFv antibody (5F7-Cys) was also generated and showed a dissociation constant of 5.22 x 10(-9)M that is 5.5-fold lower than that of monomeric 5F7 antibody. The bivalent affinity matured L1 scFv antibody thus showed stronger binding by a factor of 310 compared to the wild type clone. This antibody should be useful in various biological assays.
AB - The recognition molecule L1 plays important functional roles in the nervous system and in non-neural tissues. Since antibodies to L1 are of prime importance to study its functional properties, we have generated affinity matured human single chain variable fragment (scFv) antibodies against mouse L1 by introducing random mutations in the complementarity determining regions (CDRs) of a previously isolated scFv antibody heavy chain (CDR1 and CDR2) and light chain (CDR3). After biopanning the mutant library, a clone (5F7) that gave the strongest ELISA signal was expressed, purified, and characterized. The dissociation constant of 5F7 (2.86 x 10(-8)M) was decreased 60-fold compared to the wild type clone G6 (1.72 x 10(-6)M). 5F7 detected L1 by Western blot analysis in mouse brain homogenates and recognized L1 in L1 transfected cells and cryosections from mouse retina and optic nerve by immunofluorescence. Bivalent 5F7 scFv antibody (5F7-Cys) was also generated and showed a dissociation constant of 5.22 x 10(-9)M that is 5.5-fold lower than that of monomeric 5F7 antibody. The bivalent affinity matured L1 scFv antibody thus showed stronger binding by a factor of 310 compared to the wild type clone. This antibody should be useful in various biological assays.
KW - Animals
KW - Antibodies
KW - Antibody Affinity
KW - Binding Sites, Antibody
KW - CHO Cells
KW - Cricetinae
KW - Dimerization
KW - Epitope Mapping
KW - Genetic Vectors
KW - Humans
KW - Immunoglobulin Variable Region
KW - Immunohistochemistry
KW - Mice
KW - Mutagenesis, Site-Directed
KW - Neural Cell Adhesion Molecule L1
KW - Optic Nerve
KW - Peptide Library
KW - Recombinant Fusion Proteins
KW - Retina
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
M3 - SCORING: Journal article
C2 - 12535641
VL - 301
SP - 60
EP - 70
JO - BIOCHEM BIOPH RES CO
JF - BIOCHEM BIOPH RES CO
SN - 0006-291X
IS - 1
ER -