ArticleThe Plant cell2025
ANAPHASE-PROMOTING COMPLEX/CYCLOSOME coactivators maintain AURORA 1 kinase homeostasis during meiotic chromosome segregation.
Article in The Plant cell, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- A CDC20 allelic series reveals stage-specific control of metaphase-to-anaphase transitions during mitosis and meiosis in rice.Science China. Life sciences · 2026Article
- Chromosomal collinearity drives meiotic instability in Brassica autoallopolyploid.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2026Article
- Setting the stage: the sleek cell-cycle machinery of the liverwort Marchantia polymorpha.The Plant cell · 2026Article
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9 authors.
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Abstract
Faithful chromosome segregation is essential for both mitotic and meiotic cell division. The anaphase-promoting complex/cyclosome (APC/C) and its coactivators are required for meiotic chromosome segregation, but their potential targets and regulatory mechanisms remain unclear in plants. Here, we performed a ubiquitinome analysis and show that Arabidopsis thaliana Aurora 1 (AUR1) is over-ubiquitinated at lysine 102 in the coactivator Cell Division Cycle 20.1 (cdc20.1) mutants and that AUR1 overexpression can partially rescue the cdc20.1 meiotic defect. We also demonstrate that APC/C ubiquitinates AUR1, leading to its degradation through the 26S proteasome pathway. Moreover, the APC/C subunit and coactivators Cell Cycle Switch 52 A2/B (CCS52A2/B) and CDC20.1 interact with AUR1 both in vitro and in vivo. Intriguingly, CCS52A2/B promotes AUR1 ubiquitination and degradation, while CDC20.1 prevents AUR1 degradation. Consistent with this finding, AUR1 levels are lower in cdc20.1 and higher in ccs52 mutants relative to Col-0, and mutation of CCS52A2/B causes defects in meiotic spindle assembly and homologous chromosome segregation. Genetic analyses demonstrate that Arabidopsis anaphase-promoting complex/cyclosome subunit 8 (APC8), CDC20.1, CCS52 and AUR1 act in the same pathway to control meiotic spindle assembly and homologous chromosome segregation. Thus, this work provides mechanistic insight into the role of APC/C coactivators in regulating AUR1 homeostasis during meiosis in plants.
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