A role for H3K4 monomethylation in gene repression and partitioning of chromatin readers

Mol Cell. 2014 Mar 20;53(6):979-92. doi: 10.1016/j.molcel.2014.02.032.

Abstract

Monomethylation of lysine 4 on histone H3 (H3K4me1) is a well-established feature of enhancers and promoters, although its function is unknown. Here, we uncover roles for H3K4me1 in diverse cell types. Remarkably, we find that MLL3/4 provokes monomethylation of promoter regions and the conditional repression of muscle and inflammatory response genes in myoblasts. During myogenesis, muscle genes are activated, lose MLL3 occupancy, and become H3K4-trimethylated through an alternative COMPASS complex. Monomethylation-mediated repression was not restricted to skeletal muscle. Together with H3K27me3 and H4K20me1, H3K4me1 was associated with transcriptional silencing in embryonic fibroblasts, macrophages, and human embryonic stem cells (ESCs). On promoters of active genes, we find that H3K4me1 spatially demarcates the recruitment of factors that interact with H3K4me3, including ING1, which, in turn, recruits Sin3A. Our findings point to a unique role for H3K4 monomethylation in establishing boundaries that restrict the recruitment of chromatin-modifying enzymes to defined regions within promoters.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Chromatin*
  • DNA Methylation
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism
  • Embryo, Mammalian
  • Embryonic Stem Cells / cytology
  • Embryonic Stem Cells / metabolism
  • Enhancer Elements, Genetic
  • Fibroblasts / cytology
  • Fibroblasts / metabolism
  • Gene Expression Regulation, Developmental*
  • Genome
  • Histone-Lysine N-Methyltransferase
  • Histones / genetics*
  • Histones / metabolism
  • Humans
  • Inhibitor of Growth Protein 1
  • Intracellular Signaling Peptides and Proteins / genetics
  • Intracellular Signaling Peptides and Proteins / metabolism
  • Macrophages / cytology
  • Macrophages / metabolism
  • Mice
  • Muscle Development / genetics*
  • Myoblasts / cytology
  • Myoblasts / metabolism*
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism
  • Promoter Regions, Genetic
  • Repressor Proteins / genetics
  • Repressor Proteins / metabolism
  • Signal Transduction
  • Sin3 Histone Deacetylase and Corepressor Complex
  • Tumor Suppressor Proteins / genetics
  • Tumor Suppressor Proteins / metabolism

Substances

  • Chromatin
  • DNA-Binding Proteins
  • Histones
  • ING1 protein, human
  • Inhibitor of Growth Protein 1
  • Intracellular Signaling Peptides and Proteins
  • KMT2C protein, human
  • Nuclear Proteins
  • Repressor Proteins
  • SIN3A transcription factor
  • Tumor Suppressor Proteins
  • Histone-Lysine N-Methyltransferase
  • MLL4 protein, human
  • Sin3 Histone Deacetylase and Corepressor Complex

Associated data

  • GEO/GSE50590