Answers are grounded in this paper and cite their sources.
Reveals the noncatalytic role of TET1 in methylation regulation in the male germline, suggesting implications for understanding germline methylomes.
In the germline, DNA methylation is globally erased in primordial germ cells (PGCs), enabling establishment of sex-specific methylomes in prospermatogonia or oocytes. The catalytic activity of TET1 is required for complete demethylation in PGCs, yet sperm from Tet1 −/− mice display methylation defects not explained by incomplete erasure. Instead, these defects arise from abnormal de novo methylation during development, coinciding with erosion of H3K4me3, a chromatin modification that blocks DNMT3A/3L. Using a catalytically inactive Tet1 HxD mouse line, we demonstrate a noncatalytic role of TET1 in promoting H3K4me3 deposition and protecting a subset of sperm hypomethylated regions from aberrant methylation in prospermatogonia.
No takes yet. Share an insight, caveat, or question.
Prasasya et al. (2026) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: