Tag: Spindle assembly checkpoint
Spindle Assembly Checkpoint
The spindle assembly checkpoint (SAC) is a mitotic surveillance system that prevents premature anaphase onset by monitoring kinetochore–microtubule attachment and tension. Through coordinated action with Aurora B kinase and the Chromosomal Passenger Complex, the SAC ensures accurate chromosome segregation and protects cells from aneuploidy.
Mitotic Error Correction
Mitotic error correction is a tension‑sensing mechanism that detects and destabilises incorrect kinetochore–microtubule attachments. Driven by Aurora B kinase and the Chromosomal Passenger Complex, this process ensures accurate chromosome segregation and prevents aneuploidy, making it essential for genomic stability.
Cdc20
Cdc20 is a key activator of the APC/C complex, initiating the metaphase‑to‑anaphase transition by promoting securin and Cyclin B degradation. Regulated by checkpoint proteins such as Mad2 and BubR1, Cdc20 safeguards chromosome segregation, while its dysregulation contributes to aneuploidy and cancer progression.
Cell Cycle Checkpoint
Cell‑cycle checkpoints act as surveillance systems that monitor DNA integrity, replication completeness and spindle attachment. The G1, G2 and spindle checkpoints prevent cells with damage or misaligned chromosomes from dividing, ensuring accurate genome transmission and protecting against genomic instability and cancer.
Spindle Assembly Checkpoint
The spindle assembly checkpoint (SAC) is a mitotic surveillance system that prevents premature anaphase onset by monitoring kinetochore–microtubule attachment and tension. Through coordinated action with Aurora B kinase and the Chromosomal Passenger Complex, the SAC ensures accurate chromosome segregation and protects cells from aneuploidy.
Mitotic Error Correction
Mitotic error correction is a tension‑sensing mechanism that detects and destabilises incorrect kinetochore–microtubule attachments. Driven by Aurora B kinase and the Chromosomal Passenger Complex, this process ensures accurate chromosome segregation and prevents aneuploidy, making it essential for genomic stability.
Cdc20
Cdc20 is a key activator of the APC/C complex, initiating the metaphase‑to‑anaphase transition by promoting securin and Cyclin B degradation. Regulated by checkpoint proteins such as Mad2 and BubR1, Cdc20 safeguards chromosome segregation, while its dysregulation contributes to aneuploidy and cancer progression.
Cell Cycle Checkpoint
Cell‑cycle checkpoints act as surveillance systems that monitor DNA integrity, replication completeness and spindle attachment. The G1, G2 and spindle checkpoints prevent cells with damage or misaligned chromosomes from dividing, ensuring accurate genome transmission and protecting against genomic instability and cancer.