SATB1 regulates beta-like globin genes through matrix related nuclear relocation of the cluster

Biochem Biophys Res Commun. 2009 May 22;383(1):11-5. doi: 10.1016/j.bbrc.2009.03.122. Epub 2009 Mar 28.

Abstract

The nuclear location and relocation of genes play crucial regulatory roles in gene expression. SATB1, a MAR-binding protein, has been found to regulate beta-like globin genes through chromatin remodeling. In this study, we generated K562 cells over-expressing wild-type or nuclear matrix targeting sequences (NMTS)-deficient SATB1 and found that like wild-type SATB1, NMTS-deficient SATB1 induces out loop of beta-globin cluster from its chromosome territory (CT), while it is unable to associate the cluster with the nuclear matrix as wild-type SATB1 does and had no regulatory functions to the beta-globin cluster. Besides, our data showed that the transacting factor occupancies and chromatin modifications at beta-globin cluster were differentially affected by wild-type and NMTS-deficient SATB1. These results indicate that SATB1 regulates beta-like globin genes at the nuclear level interlaced with chromatin and DNA level, and emphasize the nuclear matrix binding activity of SATB1 to its regulatory function.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Active Transport, Cell Nucleus
  • Chromatin / metabolism
  • DNA Polymerase II / metabolism
  • GATA1 Transcription Factor / metabolism
  • Gene Expression Regulation*
  • HeLa Cells
  • Humans
  • In Situ Hybridization, Fluorescence
  • Matrix Attachment Region Binding Proteins / genetics
  • Matrix Attachment Region Binding Proteins / metabolism*
  • Multigene Family*
  • Nuclear Matrix / metabolism*
  • beta-Globins / genetics*

Substances

  • Chromatin
  • GATA1 Transcription Factor
  • GATA1 protein, human
  • Matrix Attachment Region Binding Proteins
  • SATB1 protein, human
  • beta-Globins
  • DNA Polymerase II