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Structural classification of CDR-H3 in antibodies
H Shirai1, A Kidera, H Nakamura
1Department of Bioinformatics, Biomolecular Engineering Research Institute, Suita, Osaka, Japan.
FEBS Letters
|December 9, 1996
Summary
The antibody heavy chain's third complementarity determining region (CDR-H3) shows sequence-structure rules. These findings aid in antibody structural modeling and design.
Area of Science:
- Immunology
- Structural Biology
- Biochemistry
Background:
- The third complementarity determining region of the antibody heavy chain (CDR-H3) exhibits significant sequence and length variability.
- Unlike other CDRs, CDR-H3 lacks established canonical structures, complicating sequence-structure relationship predictions.
Purpose of the Study:
- To investigate and define rules governing the conformational dependence of CDR-H3 on its amino acid sequence.
- To provide a basis for improved antibody structural modeling and design.
Main Methods:
- Analysis of 55 CDR-H3 segments from experimentally determined crystal structures.
- Derivation of sequence-based rules for CDR-H3 conformation.
Main Results:
- Several key rules were identified that partly explain CDR-H3 conformation based on amino acid sequence.
- The derived rules are physically plausible and offer insights into CDR-H3 structural determinants.
Conclusions:
- The established rules offer a significant advancement in understanding CDR-H3 structure-sequence relationships.
- These findings are expected to be valuable for the rational design and modeling of antibodies.