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Comparative Study
. 1982 Mar;15(3):287-97.
doi: 10.1007/BF00364337.

Rabbit heavy chain haplotypes--allotypic determinants expressed by VH-CH recombinants

R G Mage, S Dray, A Gilman-Sachs, C Hamers-Casterman, R Hamers, W C Hanly, T J Kindt, K L Knight, W J Mandy, J Naessens
Comparative Study

Rabbit heavy chain haplotypes--allotypic determinants expressed by VH-CH recombinants

R G Mage et al. Immunogenetics. 1982 Mar.

Abstract

This report summarizes our current understanding of the heavy chain haplotypes found in our laboratories' rabbits. Independently derived data from several laboratories have been synthesizes into a consistent picture of the linked inheritance of allotypic markers found on the different heavy chain classes and subclasses of rabbit immunoglobulins in pedigreed rabbits, including the families of three apparent VH-CH recombinants. In one recombinant, the entire group of CH markers (C mu, C gamma, and C alpha) recombined with the set of VH. Although in the other two recombinants all CH markers may also have recombined as a group, in one of these only IgG and IgA CH genes were informative; in the other recombinant, only the IgG allotypes were informative. Some allotypic determinants found on IgM molecules ("conformational") appear only when a specific variable region allotype (VHa) is combined with a specific mu constant region allotype (C mu). New combinations of VHa and C mu allotypes were generated in two of the genetic recombinants and led to new "conformational" determinants. The gains and losses observed lend support to the hypothesis that the determinants result from conformations generated by the combination of allotype-specific VH and C mu protein sequences. Conceivably, DNA events that join VH to diversity (D)- and joining (J)-coding sequences or mRNA processing events that splice J to C mu could be involved in generating the sequences that form allotype-specific determinants.

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