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Article Dans Une Revue Frontiers in Microbiology Année : 2020

Networking and Specificity-Changing DNA Methyltransferases in Helicobacter pylori

Hirokazu Yano
  • Fonction : Auteur
Md Zobaidul Alam
  • Fonction : Auteur
Emiko Rimbara
  • Fonction : Auteur
Tomoko F. Shibata
  • Fonction : Auteur
Masaki Fukuyo
  • Fonction : Auteur
Yoshikazu Furuta
  • Fonction : Auteur
Tomoaki Nishiyama
  • Fonction : Auteur
Shuji Shigenobu
  • Fonction : Auteur
Mitsuyasu Hasebe
  • Fonction : Auteur
Atsushi Toyoda
  • Fonction : Auteur
Yutaka Suzuki
  • Fonction : Auteur
Sumio Sugano
  • Fonction : Auteur
Keigo Shibayama
  • Fonction : Auteur

Résumé

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 object Helicobacter 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, or firework, consisting of epigenetic systems ever-changing their specificity in search for adaptation, provides a new paradigm in understanding global gene regulation and adaptive evolution.

Dates et versions

hal-02928166 , version 1 (02-09-2020)

Identifiants

Citer

Hirokazu Yano, Md Zobaidul Alam, Emiko Rimbara, Tomoko F. Shibata, Masaki Fukuyo, et al.. Networking and Specificity-Changing DNA Methyltransferases in Helicobacter pylori. Frontiers in Microbiology, 2020, 11, pp.1628. ⟨10.3389/fmicb.2020.01628⟩. ⟨hal-02928166⟩
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