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Targeting Cysteine Thiols for in Vitro Site-specific Glycosylation of Recombinant Proteins
Published on: October 4, 2017
Cysteine proteases: destruction ability versus immunomodulation capacity in immune cells
Tina Zavasnik-Bergant1, Boris Turk
1Department of Biochemistry, Molecular and Structural Biology, Jozef Stefan Institute, SI-1000, Ljubljana, Slovenia.
Biological Chemistry
|November 3, 2007
Summary
Cysteine proteases, also known as cathepsins, are crucial for immune responses, including antigen presentation by MHC II molecules and T-lymphocyte activation. This review explores their vital roles in physiological processes and disease pathogenesis.
Area of Science:
- Biochemistry
- Immunology
- Cell Biology
Background:
- Cysteine proteases (cathepsins) are essential enzymes involved in numerous physiological and pathological processes.
- They are key components of the endosomal/lysosomal system, critical for immune functions.
- Autophagy and lysosomal pathways are central to antigen processing and presentation.
Purpose of the Study:
- To review the pivotal roles of cysteine proteases in the immune response.
- To elucidate the mechanisms by which cathepsins influence antigen processing and presentation.
- To discuss the involvement of cysteine proteases in T-lymphocyte functions and disease.
Main Methods:
- Literature review of studies on cysteine proteases and immune function.
- Analysis of the role of endosomal/lysosomal cysteine proteases in antigen processing.
- Examination of cathepsin C's function in T-lymphocyte granzyme activation.
Main Results:
- Cysteine proteases are integral to major histocompatibility class II (MHC II) maturation and antigen processing.
- Autophagy facilitates the presentation of cytosolic antigens via lysosomal cathepsins and MHC II.
- Cathepsin C is a critical enzyme for activating granzymes in T-lymphocytes.
Conclusions:
- Cysteine proteases are indispensable for effective immune responses, particularly in antigen presentation and T-cell mediated cytotoxicity.
- Dysregulation of cathepsin activity is implicated in various diseases.
- Understanding these enzymes offers therapeutic targets for immune-related disorders.
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