Sequences of variable regions of hybridoma antibodies to alpha (1----6) dextran in BALB/c and C57BL/6 mice.
The variable region sequences of light and heavy chains of three hybridoma antibodies to alpha (1----6) dextran, two from BALB/c and one from C57BL/6 mice, were determined by cloning and sequencing their cDNA. The three kappa-light chains are identical in nucleotide and amino acid sequences, except for the use of different J by BALB/c and C57BL/6; all three had the germ-line sequence of antibodies to 2-phenyloxazolone (20). Nevertheless, 2-phenyloxazolone BSA did not cross-react in gel with antidextrans, nor did dextran react with anti-2-phenyloxazolone ascitic fluids. The heavy chains differed, the BALB/c hybridomas having only three amino acid differences in CDR2 and two in CDR3; the C57BL/6 hybridoma differed throughout the variable region. All three VH are members of the J558 family. The three identical V kappa sequences suggest a significant role in dextran binding, with the differences in CDR of VH and the various J mini-genes of VL and VH being responsible for only fine differences in specificity. Alternatively, the role of V kappa might be minor, with most of the complementarity ascribable to VH. Additional sequences are needed to evaluate whether these data are typical of the repertoire of anti-alpha (1----6) dextran-combining sites.
S K
SK
Sikder
P N
PN
Akolkar
P M
PM
Kaladas
S L
SL
Morrison
E A
EA
Kabat
D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000235:genetics*; D000916:Antibody Diversity; D001483:Base Sequence; D003911:Dextrans / Q000276:immunology*; D006825:Hybridomas / Q000378:metabolism*; D007143:Immunoglobulin Heavy Chains / Q000235:genetics; D007147:Immunoglobulin Light Chains / Q000235:genetics; D007135:Immunoglobulin Variable Region / Q000235:genetics*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D013045:Species Specificity
D000911:Antibodies, Monoclonal; D003911:Dextrans; D007143:Immunoglobulin Heavy Chains; D007147:Immunoglobulin Light Chains; D007135:Immunoglobulin Variable Region; C041999:alpha-1,6-dextran