Decoding chromatin states by proteomic profiling of nucleosome readers

Nature. 2024 Mar;627(8004):671-679. doi: 10.1038/s41586-024-07141-5. Epub 2024 Mar 6.

Abstract

DNA and histone modifications combine into characteristic patterns that demarcate functional regions of the genome1,2. While many 'readers' of individual modifications have been described3-5, how chromatin states comprising composite modification signatures, histone variants and internucleosomal linker DNA are interpreted is a major open question. Here we use a multidimensional proteomics strategy to systematically examine the interaction of around 2,000 nuclear proteins with over 80 modified dinucleosomes representing promoter, enhancer and heterochromatin states. By deconvoluting complex nucleosome-binding profiles into networks of co-regulated proteins and distinct nucleosomal features driving protein recruitment or exclusion, we show comprehensively how chromatin states are decoded by chromatin readers. We find highly distinctive binding responses to different features, many factors that recognize multiple features, and that nucleosomal modifications and linker DNA operate largely independently in regulating protein binding to chromatin. Our online resource, the Modification Atlas of Regulation by Chromatin States (MARCS), provides in-depth analysis tools to engage with our results and advance the discovery of fundamental principles of genome regulation by chromatin states.

MeSH terms

  • Binding Sites
  • Chromatin Assembly and Disassembly*
  • Chromatin* / chemistry
  • Chromatin* / genetics
  • Chromatin* / metabolism
  • DNA / genetics
  • DNA / metabolism
  • Enhancer Elements, Genetic
  • Heterochromatin / genetics
  • Heterochromatin / metabolism
  • Histones / metabolism
  • Humans
  • Nuclear Proteins* / analysis
  • Nuclear Proteins* / metabolism
  • Nucleosomes* / chemistry
  • Nucleosomes* / genetics
  • Nucleosomes* / metabolism
  • Promoter Regions, Genetic
  • Protein Binding
  • Proteomics* / methods

Substances

  • Chromatin
  • DNA
  • Heterochromatin
  • Histones
  • Nuclear Proteins
  • Nucleosomes