Histone modification-driven structural remodeling unleashes DNMT3B in DNA methylation.

ABSTRACT: The DNA methyltransferase 3B (DNMT3B) plays a vital role in shaping DNA methylation patterns during mammalian development. DNMT3B is intricately regulated by histone H3 modifications, yet the dynamic interplay between DNMT3B and histone modifications remains enigmatic. Here, we demonstrate that the PWWP (proline-tryptophan-tryptophan-proline) domain within DNMT3B exhibits remarkable dynamics that enhances the enzyme's methyltransferase activity upon interactions with a modified histone H3 peptide (H3K4^me0K36^me3). In the presence of H3K4^me0K36^me3, both the PWWP and ADD (ATRX-DNMT3-DNMT3L) domains transition from autoinhibitory to active conformations. In this active state, the PWWP domain most often aligns closely with the catalytic domain, allowi

SUBMITTER: Cho CC 

PROVIDER: S-EPMC11939060 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature