4.6 Article

Networking and Specificity-Changing DNA Methyltransferases inHelicobacter pylori

Journal

FRONTIERS IN MICROBIOLOGY
Volume 11, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2020.01628

Keywords

epigenetics; methylome; DNA methylation; gastric cancer; epigenome; DNA methyltransferase; SMRT; Pacbio

Categories

Funding

  1. JSPS KAKENHI [25850049, 25291080, 22128001]
  2. Ichiro Kanehara foundation of promotion of medical sciences and medical care
  3. MEXT KAKENHI [221S0002, 24113506, 26113704]
  4. Bio-oriented Technology Research Advance Institution [121205003001002100019]
  5. Science and technology research promotion program for agriculture, forestry, fisheries and food industry from MAFF [26025A]
  6. NIBB Collaborative Research Program [19-454]
  7. Grants-in-Aid for Scientific Research [26113704, 25850049] Funding Source: KAKEN

Ask authors/readers for more resources

Epigenetic DNA base methylation plays important roles in gene expression regulation. We here describe a gene expression regulation network consisting of many DNA methyltransferases each frequently changing its target sequence-specificity. Our objectHelicobacter pylori, a bacterium responsible for most incidence of stomach cancer, carries a large and variable repertoire of sequence-specific DNA methyltransferases. By creating a dozen of single-gene knockout strains for the methyltransferases, we revealed that they form a network controlling methylome, transcriptome and adaptive phenotype sets. The methyltransferases interact with each other in a hierarchical way, sometimes regulated positively by one methyltransferase but negatively with another. Motility, oxidative stress tolerance and DNA damage repair are likewise regulated by multiple methyltransferases. Their regulation sometimes involves translation start and stop codons suggesting coupling of methylation, transcription and translation. The methyltransferases frequently change their sequence-specificity through gene conversion of their target recognition domain and switch their target sets to remodel the network. The emerging picture of a metamorphosing gene regulation network, orfirework, consisting of epigenetic systems ever-changing their specificity in search for adaptation, provides a new paradigm in understanding global gene regulation and adaptive evolution.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available