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A Human Tyrosine Phosphatase Interactome Mapped by Proteomic Profiling.
Parveen Kumar1, Prathyusha Munnangi, Kvs Rammohan Chowdary
1Graduate Studies, Manipal University , Manipal, 576104, India.
Journal of Proteome Research
|July 5, 2017
Summary
This study maps human tyrosine phosphatase interactions, revealing new cellular roles and disease links. A key finding is PTPN5
Area of Science:
- Cellular Biology
- Proteomics
- Biochemistry
Background:
- Tyrosine phosphatases are crucial for cellular functions and disease.
- Existing knowledge of their interacting proteins is limited.
- A comprehensive protein interaction network is needed.
Purpose of the Study:
- To construct a high-confidence interaction network for human tyrosine phosphatases.
- To identify novel cellular processes and disease-associated interactions.
- To functionally validate a specific phosphatase-protein interaction.
Main Methods:
- Proteomic approach to identify protein interactions.
- Network analysis of 81 human tyrosine phosphatases.
- Biochemical validation of PTPN5 and Mob1a interaction.
Main Results:
- An interaction network of 81 tyrosine phosphatases with 1884 high-confidence interactions was built.
- 85% of these interactions are previously unreported.
- PTPN5 was found to dephosphorylate Mob1a at Y26, essential for cytokinesis.
Conclusions:
- The study provides a valuable resource for tyrosine phosphatase research.
- Identified interactions link phosphatases to new cellular functions and diseases, including cancer.
- The PTPN5-Mob1a interaction highlights a novel regulatory mechanism in cell division.
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