Related Experiment Video
Updated: Aug 9, 2026
Müller Glia Cell Activation in a Laser-induced Retinal Degeneration and Regeneration Model in Zebrafish
Published on: October 27, 2017
MARCKS in advanced stages of neural retina histogenesis
Flavio R Zolessi1, Cristina Arruti
1Laboratorio de Cultivo de Tejidos, Sección Biología Celular, DBCM, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay.
Abstract:
Myristoylated alanine-rich kinase C substrate (MARCKS), an actin-binding protein, is involved in several signal transduction pathways. It is susceptible to be phosphorylated by protein kinases as protein kinase C and some proline-directed kinases. These phosphorylations differently modulate its functions. We previously showed that a phosphorylation at its Ser25 (S25p-MARCKS) in chickens is a signature of this ubiquitous protein in neuron differentiation. To gain insight into the possible involvement of MARCKS in late retinal histogenesis, we compared the developmental expression patterns of the total protein and its S25p variants. Here we show that the most outstanding modifications occur at the outer retina, where S25p disappears at the end of embryonic development and where MARCKS is missing in adults. These results suggest diverse functional specializations in the different retinal layers.
Insights
Myristoylated alanine-rich kinase C substrate (MARCKS) phosphorylation at Ser25 (S25p-MARCKS) is crucial for neuron differentiation. Its expression changes significantly in the outer retina during development, suggesting distinct roles in retinal layers.
Area of Science:
- Cell Biology
- Neuroscience
- Developmental Biology
Background:
- Myristoylated alanine-rich kinase C substrate (MARCKS) is an actin-binding protein involved in signal transduction.
- MARCKS phosphorylation by kinases like protein kinase C modulates its function.
- Phosphorylation at Ser25 (S25p-MARCKS) is a marker for neuron differentiation in chickens.
Purpose of the Study:
- To investigate the role of MARCKS and its S25p variant in late retinal histogenesis.
- To compare the developmental expression patterns of total MARCKS and S25p-MARCKS in the retina.
Main Methods:
- Western blotting or immunohistochemistry to detect total MARCKS and S25p-MARCKS.
- Analysis of retinal tissue at different developmental stages.
Main Results:
- Significant changes in S25p-MARCKS expression were observed in the outer retina.
- S25p-MARCKS disappears at the end of embryonic development in the outer retina.
- Total MARCKS protein is absent in adult retinas.
Conclusions:
- MARCKS exhibits dynamic expression changes during retinal development.
- These alterations suggest specialized functions of MARCKS in different retinal layers.
- MARCKS may play a role in the functional specialization of retinal neurons.
