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Updated: Feb 5, 2026

Quantification of Protein Interaction Network Dynamics using Multiplexed Co-Immunoprecipitation
Published on: August 21, 2019
MARCKS regulates neuritogenesis and interacts with a CDC42 signaling network
J J Brudvig1,2, J T Cain1, R M Sears1,2
1Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD, 57104, USA.
Myristoylated alanine-rich C kinase substrate (MARCKS) is crucial for neuronal differentiation. Lacking MARCKS, neurons show reduced neurite outgrowth and complexity, highlighting its role in neurite initiation.
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Neuronal differentiation involves complex cytoskeletal rearrangements for neurite outgrowth.
- Upstream regulators coordinating cytoskeletal networks for neurite initiation remain largely uncharacterized.
Purpose of the Study:
- To investigate the role of Myristoylated alanine-rich C kinase substrate (MARCKS) in neuronal differentiation and neurite initiation.
- To identify MARCKS interacting proteins within developing neurites.
Main Methods:
- Analysis of Marcks knockout (Marcks-/-) cortical neurons.
- In vitro proteomics screen to identify MARCKS interactors.
- Characterization of MARCKS interaction with the CDC42-centered network.
Main Results:
- Marcks-/- cortical neurons exhibit significantly fewer neurites and reduced arborization complexity.
- Proteomics identified MARCKS interactors involved in neurite development.
- MARCKS interacts with a CDC42-centered network, without altering global CDC42 activation levels.
Conclusions:
- MARCKS plays a critical role in promoting neurite initiation and complexity during neuronal differentiation.
- MARCKS may regulate the localization and function of CDC42 within specialized cellular compartments like nascent neurites.
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