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Localization of SUMO-modified Proteins Using Fluorescent Sumo-trapping Proteins
Published on: April 27, 2019
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Cross-talk between sumoylation and phosphorylation in mouse spermatocytes
Yuxuan Xiao1, Benjamin Lucas1, Elana Molcho1
1Department of Biology, Stern College, Yeshiva University, New York, NY, USA.
Biochemical and Biophysical Research Communications
|April 25, 2017
Summary
Sumoylation inhibition arrests male meiosis (G2/M1 transition) in mouse spermatocytes by preventing chromosome condensation. This impacts key kinases like PLK1 and Aurora kinases, crucial for meiotic progression.
Area of Science:
- Reproductive biology
- Molecular cell biology
- Meiosis research
Background:
- Posttranslational modifications regulate the meiotic G2/M1 transition, but their cross-talk is poorly understood, especially in spermatocytes.
- Sumoylation is vital for development and reproduction, with defects causing aneuploidy in oocytes.
Purpose of the Study:
- Investigate the role of sumoylation in the G2/M1 meiotic transition in mouse pachytene spermatocytes.
- Examine the cross-talk between sumoylation and phosphorylation by assessing kinase activity upon sumoylation inhibition.
Main Methods:
- Inhibition of sumoylation using ginkgolic acid (GA) in mouse spermatocyte cultures.
- Monitoring of the G2/M1 meiotic transition.
- Assessment of kinase activity (PLK1, Aurora kinases, c-Abl, ERKs, AKT).
Main Results:
- GA treatment arrested the G2/M1 transition, inhibiting chromosome condensation and synaptonemal complex disassembly.
- Sumoylation inhibition negatively regulated the activity of PLK1 and Aurora kinases.
- Activities of c-Abl, ERKs, and AKT were unaffected or increased.
Conclusions:
- Sumoylation is essential for the G2/M1 meiotic transition in male mouse germ cells.
- PLK1 and Aurora kinases are key targets negatively regulated by sumoylation, contributing to meiotic arrest.
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