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Updated: Mar 28, 2026

Studying Protein Function and the Role of Altered Protein Expression by Antibody Interference and Three-dimensional Reconstructions
Published on: April 21, 2016
Antibody Recognition of Disordered Antigens
Christopher A MacRaild1, Jack S Richards2, Robin F Anders3
1Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC 3052, Australia.
Disordered proteins are key antigens in infectious diseases. Antibodies recognize disordered epitopes as effectively as ordered ones, with recognition affinity weakly dependent on disorder, challenging previous assumptions.
Area of Science:
- Immunology
- Structural Biology
- Protein Science
Background:
- Disordered proteins are significant antigens in infectious diseases.
- The molecular mechanisms of antibody recognition for disordered antigens remain poorly understood.
Purpose of the Study:
- To investigate the recognition of disordered protein antigens by antibodies.
- To elucidate the structural and affinity characteristics of disordered epitopes compared to ordered ones.
Main Methods:
- Analysis of a large dataset of protein antigens and their antibody recognition.
- Structural determination of complexes between ordered/disordered protein antigens and antibodies.
Main Results:
- Disordered epitopes are recognized by antibodies with a frequency comparable to ordered epitopes.
- Antibody recognition affinity shows weak dependence on the degree of disorder within an epitope.
- Disordered epitopes are smaller but more efficient in antibody interaction than ordered epitopes.
Conclusions:
- Disordered antigens are confirmed as valid targets for antibody recognition.
- Antibody recognition of disordered epitopes is highly sensitive to variations within the epitope.
- Findings have implications for understanding molecular recognition specificity in the context of protein disorder.
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