Rim4-seeded stress granules connect temperature sensing to meiotic regulation

Rudian Zhang, Shunjin Li, Wenzhi Feng, Suhong Qian, Akshay John Chellappa and Fei Wang ()
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Rudian Zhang: Department of Cell Biology
Shunjin Li: Department of Cell Biology
Wenzhi Feng: Department of Cell Biology
Suhong Qian: Department of Cell Biology
Akshay John Chellappa: Department of Cell Biology
Fei Wang: Department of Cell Biology

Nature Communications, 2025, vol. 16, issue 1, 1-22

Abstract: Abstract Meiosis is more vulnerable to heat than mitosis in many species including humans. In Saccharomyces cerevisiae, we discovered that stress granule formation halts meiosis at high temperatures. Meiotic stress granules appear at lower temperatures (33–42 °C) than mitotic stress granules (~46 °C), requiring the meiosis-specific RNA binding protein Rim4. Heat triggers site-specific Rim4 dephosphorylation, causing it to self-assemble into stress granule seeds. These recruit other stress granule components like Pab1 and mRNAs, pausing meiosis. Normally, 14-3-3 proteins block this assembly by binding phosphorylated Rim4. After temperature drops, Hsp104 assists to break down stress granules. Longer stress granule persistence correlates with better recovery, suggesting stress granules might provide temporal insulation for cellular repair processes prior to meiotic resumption.

Date: 2025
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DOI: 10.1038/s41467-025-60645-0

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