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Updated: Mar 23, 2026
08:40
Spatial and Temporal Analysis of Active ERK in the C. elegans Germline
Published on: November 29, 2016
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Spatial landmarks regulate a Cdc42-dependent MAPK pathway to control differentiation and the response to positional
Sukanya Basu1, Nadia Vadaie1, Aditi Prabhakar1
1Department of Biological Sciences, University at Buffalo, Buffalo, NY 14260.
Summary
Spatial landmarks regulate cell differentiation in budding yeast. Bud-site proteins control the filamentous growth MAPK pathway, linking cell polarity to differentiation.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Understanding spatial information integration in morphogenesis is crucial.
- Mechanisms of cell polarity changes during yeast differentiation to filamentous growth are unclear.
Purpose of the Study:
- To define the regulatory input of spatial landmarks on the filamentous growth MAPK pathway.
- To elucidate how bud-site selection proteins influence cell differentiation.
Main Methods:
- Investigated the role of bud-site GTPase Rsr1p and its regulator Cdc24p.
- Analyzed the regulation of the fMAPK pathway by positional landmarks.
- Observed dynamic changes in budding patterns and fMAPK activity.
Main Results:
- Rsr1p regulates the fMAPK pathway via Cdc24p, the GEF for Cdc42p.
- Positional landmarks conditionally regulate the fMAPK pathway, mirroring bud-site selection roles.
- Changes in budding patterns during filamentous growth correlated with fMAPK activity.
Conclusions:
- Cell differentiation involves reorganization of polarity at bud sites.
- A surveillance mechanism monitors spatial position to modulate MAPK-driven differentiation.
- Both extrinsic and intrinsic stresses impact spatial monitoring and differentiation response.
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