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Abstract:
Centromeres are specialized chromosomal regions that play a crucial role in chromosome segregation during cell division. The dynamic regulation of centromere function is essential for ensuring the faithful transmission of genetic material from one generation to the next. Acetylation, a post-translational modification involving the addition of an acetyl group to specific lysine residues, has recently emerged as an important mechanism for regulating centromere dynamics and function.
In this study, we investigated the role of acetylation in regulating centromere dynamics, chromosome segregation, and mitotic progression. We used a combination of biochemical, cellular, and genetic approaches, including mass spectrometry, immunofluorescence staining, live-cell imaging, and functional assays, to determine how acetylation affects the structure and function of centromeres.
Our results revealed that acetylation of specific centromere proteins, particularly the histone variant CENP-A and the centromere-associated protein CENP-C, is essential for proper centromere assembly, kinetochore formation, and chromosome segregation. We identified key enzymes responsible for acetylation and deacetylation of these proteins and showed how they regulate the dynamics of centromere-kinetochore complexes during mitosis.
Furthermore, we demonstrated that the disruption of centromere acetylation leads to defects in chromosome segregation, resulting in aneuploidy and genomic instability. These findings underscore the importance of acetylation in maintaining genomic integrity and preventing the development of diseases such as cancer.
In conclusion, our study provides novel insights into the molecular mechanisms by which acetylation regulates centromere dynamics, chromosome segregation, and mitotic progression. These findings not only contribute to our understanding of the fundamental principles of cell division but also have important implications for the development of therapeutic strategies targeting centromere function in diseases characterized by aneuploidy and genomic instability.
