Functional Interaction Between PML and SATB1 Regulates Chromatin-Loop Architecture and Transcription of the MHC Class I Locus

Nat Cell Biol. 2007 Jan;9(1):45-56. doi: 10.1038/ncb1516. Epub 2006 Dec 17.

Abstract

The function of the subnuclear structure the promyelocytic leukaemia (PML) body is unclear largely because of the functional heterogeneity of its constituents. Here, we provide the evidence for a direct link between PML, higher-order chromatin organization and gene regulation. We show that PML physically and functionally interacts with the matrix attachment region (MAR)-binding protein, special AT-rich sequence binding protein 1 (SATB1) to organize the major histocompatibility complex (MHC) class I locus into distinct higher-order chromatin-loop structures. Interferon gamma (IFNgamma) treatment and silencing of either SATB1 or PML dynamically alter chromatin architecture, thus affecting the expression profile of a subset of MHC class I genes. Our studies identify PML and SATB1 as a regulatory complex that governs transcription by orchestrating dynamic chromatin-loop architecture.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line
  • Cell Nucleus / metabolism
  • Chromatin / chemistry
  • Chromatin / genetics*
  • Gene Expression Regulation
  • Genes, MHC Class I*
  • Humans
  • Interferon-gamma / pharmacology
  • Leukemia, Promyelocytic, Acute / genetics*
  • Leukemia, Promyelocytic, Acute / metabolism
  • Matrix Attachment Region Binding Proteins / genetics*
  • Matrix Attachment Region Binding Proteins / metabolism
  • Matrix Attachment Regions / genetics
  • Models, Molecular
  • Protein Isoforms
  • RNA Interference
  • Transcription, Genetic*
  • Transfection

Substances

  • Chromatin
  • Matrix Attachment Region Binding Proteins
  • Protein Isoforms
  • SATB1 protein, human
  • Interferon-gamma