H3K9me2 genome-wide distribution in the holocentric insect Spodoptera frugiperda (Lepidoptera: Noctuidae).

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
Read More Add to Saved list
  • Additional Information
    • Source:
      Publisher: Academic Press Country of Publication: United States NLM ID: 8800135 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1089-8646 (Electronic) Linking ISSN: 08887543 NLM ISO Abbreviation: Genomics Subsets: MEDLINE
    • Publication Information:
      Original Publication: San Diego : Academic Press, [c1987-
    • Subject Terms:
      Heterochromatin*/genetics ; Histones*/metabolism; Animals ; Chromatin ; DNA Transposable Elements ; Spodoptera/genetics ; Spodoptera/metabolism
    • Abstract:
      Background: Eukaryotic genomes are packaged by Histone proteins in a structure called chromatin. There are different chromatin types. Euchromatin is typically associated with decondensed, transcriptionally active regions and heterochromatin to more condensed regions of the chromosomes. Methylation of Lysine 9 of Histone H3 (H3K9me) is a conserved biochemical marker of heterochromatin. In many organisms, heterochromatin is usually localized at telomeric as well as pericentromeric regions but can also be found at interstitial chromosomal loci. This distribution may vary in different species depending on their general chromosomal organization. Holocentric species such as Spodoptera frugiperda (Lepidoptera: Noctuidae) possess dispersed centromeres instead of a monocentric one and thus no observable pericentromeric compartment. To identify the localization of heterochromatin in such species we performed ChIP-Seq experiments and analyzed the distribution of the heterochromatin marker H3K9me2 in the Sf9 cell line and whole 4th instar larvae (L4) in relation to RNA-Seq data.
      Results: In both samples we measured an enrichment of H3K9me2 at the (sub) telomeres, rDNA loci, and satellite DNA sequences, which could represent dispersed centromeric regions. We also observed that density of H3K9me2 is positively correlated with transposable elements and protein-coding genes. But contrary to most model organisms, H3K9me2 density is not correlated with transcriptional repression.
      Conclusion: This is the first genome-wide ChIP-Seq analysis conducted in S. frugiperda for H3K9me2. Compared to model organisms, this mark is found in expected chromosomal compartments such as rDNA and telomeres. However, it is also localized at numerous dispersed regions, instead of the well described large pericentromeric domains, indicating that H3K9me2 might not represent a classical heterochromatin marker in Lepidoptera. (242 words).
      (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
    • Contributed Indexing:
      Keywords: ChIP-Seq; H3K9me2; Heterochromatin; Holocentrism; Spodoptera frugiperda
    • Accession Number:
      0 (Chromatin)
      0 (DNA Transposable Elements)
      0 (Heterochromatin)
      0 (Histones)
    • Publication Date:
      Date Created: 20211231 Date Completed: 20220331 Latest Revision: 20220401
    • Publication Date:
      20231215
    • Accession Number:
      10.1016/j.ygeno.2021.12.014
    • Accession Number:
      34971718