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快速抑制PP2A-B56磷酸酶的化学生物学系统揭示其在中期动粒张力感知 ...
研究人员发现PP2A-B56抑制会导致中期染色体立即脱离赤道板,这种效应不依赖于黏连蛋白调控,而是通过Aurora B介导的NDC80-pSer 55 磷酸化增强所致。当共处理Aurora B抑制剂时,动粒-微管连接的稳定性完全恢复,证明PP2A-B56通过持续拮抗Aurora B活性来维持中期张力感知。
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