The structural basis of antibody-antigen recognition
Inbal Sela-Culang1, Vered Kunik, Yanay Ofran
1The Goodman Faculty of Life Sciences, Bar Ilan University , Ramat Gan , Israel.
Frontiers in Immunology
|October 12, 2013
Summary
Antibodies (Abs) binding to antigens (Ags) involves more than just complementarity determining regions (CDRs). Non-CDRs and constant domains also critically contribute to antigen recognition and antibody engineering.
Area of Science:
- Immunology and Structural Biology
- Molecular and Cellular Biology
Background:
- Antibodies (Abs) are crucial for adaptive immunity, traditionally thought to bind antigens (Ags) solely via complementarity determining regions (CDRs).
- Constant domains are primarily associated with immune effector functions.
Purpose of the Study:
- To review the structural basis of antigen recognition by antibodies.
- To elaborate on the contribution of various antibody structural determinants to antigen binding.
- To discuss the role of non-CDRs and constant domains in antigen recognition and B-cell epitope prediction.
Main Methods:
- Literature review and structural analysis of antibody-antigen interactions.
- Discussion of established and emerging concepts in antibody structure-function relationships.
Main Results:
- Evidence suggests that antigen recognition is not limited to CDRs; framework regions and constant domains also play significant roles.
- Non-local and allosteric effects influence antibody-antigen interactions.
- Integrating antibody information may improve B-cell epitope prediction.
Conclusions:
- The functional separation between antibody variable and constant domains is an oversimplification.
- A comprehensive understanding of antibody structure is vital for antibody engineering and epitope prediction.
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