Cited by 47Genomics and Chromatin DynamicsEpigenetics and DNA MethylationChromosomal and Genetic Variations

HP1a, Su(var)3-9, SETDB1 and POF stimulate or repress gene expression depending on genomic position, gene length and expression pattern in drosophila melanogaster

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Lundberg, Lina E., Stenberg, Per, Larsson, Jan·2013·Nucleic Acids Research

Abstract

Heterochromatin protein 1a (HP1a) is a chromatin-associated protein important for the formation and maintenance of heterochromatin. In Drosophila, the two histone methyltransferases SETDB1 and Su(var)3-9 mediate H3K9 methylation marks that initiates the establishment and spreading of HP1a-enriched chromatin. Although HP1a is generally regarded as a factor that represses gene transcription, several reports have linked HP1a binding to active genes, and in some cases, it has been shown to stimulate transcriptional activity. To clarify the function of HP1a in transcription regulation and its association with Su(var)3-9, SETDB1 and the chromosome 4-specific protein POF, we conducted genome-wide expression studies and combined the results with available binding data in Drosophila melanogaster. The results suggest that HP1a, SETDB1 and Su(var)3-9 repress genes on chromosome 4, where non-ubiquitously expressed genes are preferentially targeted, and stimulate genes in pericentromeric regions. Further, we showed that on chromosome 4, Su(var)3-9, SETDB1 and HP1a target the same genes. In addition, we found that transposons are repressed by HP1a and Su(var)3-9 and that the binding level and expression effects of HP1a are affected by gene length. Our results indicate that genes have adapted to be properly expressed in their local chromatin environment.

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  1. [21]Riddle NC Shaffer CD Elgin SC A lot about a little dot - lessons learned from Drosophila melanogaster chromosome 4 Biochem. Cell Biol. 2009 87 229 241 19234537 PMC2950803

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Authors
Lundberg, L. E., Stenberg, P., & Larsson, J.
Affiliations
Umeå University (SE)
Corresponding author
Larsson, Jan
Venue
Nucleic Acids Research
Published
2013-03-09
Volume
41
Issue
8
Pages
4481-4494
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2155910660
Cited by
47
References
70
Citations by year
2025: 2 · 2024: 5 · 2023: 3 · 2022: 1 · 2021: 6 · 2020: 5 · 2019: 5 · 2018: 5 · 2017: 1 · 2016: 5 · 2015: 1 · 2014: 6 · 2013: 2
FWCI
2.09
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • DiVA at Umeå University (Umeå University) (submittedVersion, other-oa)
Funders
  • Swedish Cancer Foundation
  • Vetenskapsrådet
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
Keywords
HP1α, Su(var)3-9, SETDB1, POF, heterochromatin, H3K9 methylation, transcriptional repression, transcriptional activation, chromosome 4, pericentromeric heterochromatin, transposon silencing, gene length, gene expression regulation, Drosophila melanogaster
MeSH terms
Chromobox Protein Homolog 5, Animals, Centromere, Chromosomal Proteins, Non-Histone, DNA Transposable Elements, Drosophila melanogaster, Gene Expression Regulation, Histone-Lysine N-Methyltransferase, Repressor Proteins, Transcriptional Activation, Drosophila Proteins, Genome, Insect, Chromosomes, Insect

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