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Structural basis of molecular mimicry
1Department of Cancer Immunology & AIDS, Dana-Farber Cancer Institute, Boston, MA 02115, USA. wucherpf@mbcrr.harvard.edu
Abstract:
Infectious agents are thought to play an important role in the development of autoimmune diseases. Sequence similarity between infectious agents and self-proteins (molecular mimicry) has been proposed as a mechanism for the induction of autoimmunity [1]. However, it has been difficult to identify microbial peptides that activate autoreactive T cells using conventional sequence alignments. This chapter reviews progress made in the identification of such microbial peptides based on the analysis of structural features that are important for TCR recognition of MHC-bound peptides [2].
Insights
Identifying microbial peptides that trigger autoimmune diseases is challenging. This review explores structural analysis for T-cell receptor recognition, advancing the understanding of molecular mimicry in autoimmunity.
Area of Science:
- Immunology
- Autoimmunity
- Microbiology
Background:
- Infectious agents are implicated in autoimmune disease development.
- Molecular mimicry, sequence similarity between microbes and self-proteins, is a proposed mechanism.
- Conventional sequence alignments struggle to identify relevant microbial peptides.
Purpose of the Study:
- To review progress in identifying microbial peptides that activate autoreactive T cells.
- To explore novel approaches beyond sequence alignment.
Main Methods:
- Analysis of structural features crucial for T-cell receptor (TCR) recognition.
- Focus on TCR-MHC-peptide interactions.
Main Results:
- Structural analysis offers a promising avenue for identifying mimicry peptides.
- This approach overcomes limitations of traditional sequence-based methods.
Conclusions:
- Structural insights are key to understanding how microbial peptides induce autoimmunity.
- Further research using structural analysis can identify critical triggers for autoimmune diseases.