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Updated: Jun 30, 2026
10:17
A Mass Spectrometry-Based Approach to Identify Phosphoprotein Phosphatases and their Interactors
Published on: April 29, 2022
Cellular phosphatases facilitate combinatorial processing of receptor-activated signals
Dhiraj Kumar1, Raina Dua, Ravichandran Srikanth
1Immunology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India. dhirajkrverma@gmail.com
BMC Research Notes
|September 19, 2008
Summary
Protein phosphatases tightly integrate into signaling networks, creating plasticity for transmitting perturbation-specific information. This multivariate output to transcription factors specifies context-defined cellular responses.
Area of Science:
- Cellular signaling dynamics
- Signal transduction pathways
- Protein phosphorylation regulation
Background:
- Understanding signal transduction integration remains a challenge.
- The role of phosphatases in modulating cellular responses is unclear.
Purpose of the Study:
- To investigate how phosphatase regulation of phosphorylation nodes impacts signal output.
- To elucidate the network structure of signaling pathways.
Main Methods:
- Selective depletion of cellular phosphatases using siRNA.
- Examination of B cell antigen receptor (BCR) signaling dynamics.
Main Results:
- Signaling network exhibits a highly enmeshed structure with phosphatases linked to multiple nodes.
- Each node experienced unique perturbations in phosphatase activity, creating distinct signal fingerprints.
- This heterogeneity led to combinatorial manipulation of signaling pathways for transcription factors.
Conclusions:
- Tight integration of phosphatases provides network plasticity for transmitting specific information.
- A multivariate output to transcription factors specifies context-defined gene expression profiles.
- Phosphatase network integration is crucial for cellular phenotypic responses.
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