Cyclooxygenase 2: protein-protein interactions and posttranslational modifications.
Anna Alexanian1, Andrey Sorokin2
1Cardiovascular Center and Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin.
Physiological Genomics
|September 24, 2017
Summary
Researchers are uncovering new ways the cyclooxygenase 2 (COX2) enzyme is regulated by proteins. Understanding these posttranslational modifications could lead to better disease treatments and diagnostic tools.
Area of Science:
- Biochemistry
- Molecular Biology
- Enymology
Background:
- Cyclooxygenase 2 (COX2) and its prostanoids are implicated in numerous human diseases.
- COX2 is regulated at transcriptional and posttranscriptional levels, leading to drug development like NSAIDs and COXIBs.
- Emerging evidence points to posttranslational modifications regulating COX2 activity and expression.
Purpose of the Study:
- To explore the posttranslational regulation of cyclooxygenase 2 (COX2) enzyme activity and expression.
- To investigate the role of protein-protein interactions in modulating COX2 function.
- To highlight the potential of these regulatory mechanisms for therapeutic and diagnostic applications.
Main Methods:
- Review of existing literature on COX2 regulation.
- Analysis of studies investigating posttranslational modifications (s-nitrosylation, glycosylation, phosphorylation).
- Examination of research on protein interactions affecting COX2 activity and degradation.
Main Results:
- Posttranslational modifications like s-nitrosylation, glycosylation, and phosphorylation directly affect COX2 enzymatic activity.
- Proteins facilitating proteasome degradation downregulate COX2 expression.
- Proteins in close proximity to COX2 can upregulate its enzymatic activity through protein-protein interactions.
- These interactions may alter COX2 conformation or subcellular localization, impacting its function.
Conclusions:
- Posttranslational regulation of COX2 by interacting proteins is a significant factor in disease manifestation.
- Understanding these mechanisms can lead to novel therapeutic strategies indirectly targeting COX2.
- This research provides a basis for developing new diagnostic biomarkers for diseases involving COX2.
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