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Updated: Aug 19, 2026

Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
Published on: January 26, 2018
PR-Set7-dependent methylation of histone H4 Lys 20 functions in repression of gene expression and is essential for
Dmitry Karachentsev1, Kavitha Sarma, Danny Reinberg
1Waksman Institute, Department of Molecular Biology and Biochemistry, New Jersey Cancer Center, Rutgers University, Piscataway, New Jersey 08854-8020, USA.
Abstract:
The histone methyl transferase PR-Set7 mediates histone H4 Lys 20 methylation, a mark of constitutive and facultative heterochromatin. We isolated a null mutation in Drosophila PR-Set7 that suppresses position effect variegation, indicating that PR-Set7 indeed functions in silencing general gene expression. In PR-Set7 larval leg and eye discs, the number of cells is lower than normal, and the DNA content in these cells is significantly increased. These data show that PR-Set7-dependent methylation is essential for the process of mitosis. The methylation mark is highly stable and is maintained even in the absence of PR-Set7 protein.
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