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Measuring Cell-Edge Protrusion Dynamics during Spreading using Live-Cell Microscopy
Published on: November 1, 2021
Psidin, a conserved protein that regulates protrusion dynamics and cell migration
Ji Hoon Kim1, Aeri Cho, Hongyan Yin
1Department of Biological Chemistry, Center for Cell Dynamics, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, USA.
Genes & Development
|March 17, 2011
Summary
Psidin (psid) is a novel actin regulatory protein essential for cell migration. It modulates actin dynamics, influencing protrusion and retraction, and plays a conserved role in cell movement across species.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Cell migration is crucial for development and disease.
- Actin filament dynamics drive cell movement.
- Drosophila border cells are a model for studying cell migration.
Purpose of the Study:
- Identify novel genes regulating cell migration in vivo.
- Characterize the function of the psidin (psid) gene in actin dynamics and cell movement.
Main Methods:
- Screened lethal mutations in Drosophila for border cell migration defects.
- Purified Psid protein for in vitro binding assays with F-actin and tropomyosin.
- Analyzed genetic interactions with tropomyosin and cofilin.
- Assessed actin dynamics and cell migration in Drosophila and human cell culture models.
Main Results:
- Identified psidin (psid) as a regulator of border cell migration.
- Psid protein binds F-actin and inhibits tropomyosin interaction.
- Psid modulates protrusion/retraction dynamics and lamellipodial dynamics.
- Psid homolog in human cells affects migration speed and directionality.
Conclusions:
- Psidin is a conserved actin regulatory protein.
- Psid plays a critical role in controlling protrusion dynamics.
- Psid is essential for efficient cell migration.
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