• Register
X
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

X

Leaving Community

Are you sure you want to leave this community? Leaving the community will revoke any permissions you have been granted in this community.

No
Yes

Insights into GATA-1-mediated gene activation versus repression via genome-wide chromatin occupancy analysis.

The transcription factor GATA-1 is required for terminal erythroid maturation and functions as an activator or repressor depending on gene context. Yet its in vivo site selectivity and ability to distinguish between activated versus repressed genes remain incompletely understood. In this study, we performed GATA-1 ChIP-seq in erythroid cells and compared it to GATA-1-induced gene expression changes. Bound and differentially expressed genes contain a greater number of GATA-binding motifs, a higher frequency of palindromic GATA sites, and closer occupancy to the transcriptional start site versus nondifferentially expressed genes. Moreover, we show that the transcription factor Zbtb7a occupies GATA-1-bound regions of some direct GATA-1 target genes, that the presence of SCL/TAL1 helps distinguish transcriptional activation versus repression, and that polycomb repressive complex 2 (PRC2) is involved in epigenetic silencing of a subset of GATA-1-repressed genes. These data provide insights into GATA-1-mediated gene regulation in vivo.

Pubmed ID: 19941827

Authors

  • Yu M
  • Riva L
  • Xie H
  • Schindler Y
  • Moran TB
  • Cheng Y
  • Yu D
  • Hardison R
  • Weiss MJ
  • Orkin SH
  • Bernstein BE
  • Fraenkel E
  • Cantor AB

Journal

Molecular cell

Publication Data

November 25, 2009

Associated Grants

  • Agency: NHLBI NIH HHS, Id: P01 HL032262
  • Agency: NHLBI NIH HHS, Id: P01 HL032262-250016
  • Agency: NHLBI NIH HHS, Id: P01 HL32262-25
  • Agency: NIDDK NIH HHS, Id: R01 DK065806

Mesh Terms

  • Animals
  • Base Sequence
  • Binding Sites
  • Biotin
  • Biotinylation
  • Cell Line, Tumor
  • Chromatin
  • Chromatin Immunoprecipitation
  • Computational Biology
  • GATA1 Transcription Factor
  • Gene Expression Profiling
  • Gene Expression Regulation, Leukemic
  • Gene Silencing
  • Genome
  • Mice
  • Models, Genetic
  • Molecular Sequence Data
  • Polycomb-Group Proteins
  • Protein Binding
  • Regulatory Sequences, Nucleic Acid
  • Repressor Proteins
  • Sequence Analysis, DNA
  • Streptavidin
  • Transcriptional Activation