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Published on: February 3, 2013
Molecular genetics of immunoglobulins
1Department of Immunology, AFRC Institute of Animal Physiology and Genetics Research, Babraham, Cambridge, U.K.
Immunology. Supplement
|January 1, 1988
Summary
Antibody variability arises from diverse gene segments encoding variable regions and constant regions, enabling specific antigen binding and varied effector functions. DNA recombination processes generate this diversity during B-cell development, including class switching.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Antibodies exhibit protein-level variability in variable (V) regions for specificity and constant (CH) regions for effector functions.
- Light chains exist as kappa and lambda types, while heavy chains determine immunoglobulin (Ig) subclasses and effector functions.
Purpose of the Study:
- To review the structure and organization of antibody V and C genes.
- To explain the control mechanisms governing the expression of these genes.
Main Methods:
- The abstract describes the genetic basis of antibody diversity at the DNA level.
- It mentions V-region gene segments (VL-JL, VH-D-JH) and somatic mutations.
- It highlights DNA rearrangement processes during B-cell development (V-region and CH-region rearrangement).
Main Results:
- Antibody V-region diversity is generated by combining gene segments and somatic mutations.
- Constant region diversity is determined by different CH genes encoding Ig subclasses.
- DNA rearrangement in V and CH genes during B-cell development creates unique antibody repertoires and allows for class switching.
Conclusions:
- Antibody structure and function are intricately linked to the organization and expression of V and C genes.
- The processes of V-region and CH-region gene rearrangement are fundamental to adaptive immunity.
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