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Aurora B kinase is required for cell cycle progression in silkworm
Xiaoxu Gang1, Wenliang Qian1, Tianlei Zhang1
1State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
Gene
|November 13, 2016
Summary
The silkworm Aurora B (BmAurB) gene is crucial for cell division. Inhibiting BmAurB disrupts mitosis, leading to cell cycle arrest and polyploidy, highlighting its essential role in silkworm cell cycle progression.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Aurora B kinase is vital for mitosis, regulating chromosome segregation and cytokinesis.
- The chromosomal passenger complex, with Aurora B kinase as its catalytic subunit, plays a critical role in cell division.
Purpose of the Study:
- To clone and characterize the silkworm Aurora B (BmAurB) gene.
- To investigate the expression patterns and functional role of BmAurB during silkworm development and cell cycle progression.
Main Methods:
- Full-length cDNA sequence cloning of the silkworm BmAurB gene.
- Phylogenetic analysis of BmAurB with other Aurora kinases.
- RT-PCR to examine BmAurB gene expression in various silkworm tissues.
- RNA interference (RNAi) and inhibitor-mediated inhibition of BmAurB in BmN4-SID1 cells.
Main Results:
- The BmAurB protein contains a conserved S_TKc domain, and phylogenetic analysis suggests its evolutionary divergence.
- BmAurB gene expression is high in mitotic gonads, moderate in the brain, and absent in the silk gland.
- Inhibition of BmAurB disrupts mitosis, causing G2/M arrest, polyploidy, chromosome misalignment, and bi-nucleation.
Conclusions:
- The silkworm BmAurB gene is essential for proper cell cycle progression during mitosis.
- BmAurB plays a critical role in maintaining genomic stability and ensuring accurate chromosome segregation in silkworms.
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