The Zscan4-Tet2 Transcription Nexus Regulates Metabolic Rewiring and Enhances Proteostasis to Promote Reprogramming

Cell Rep. 2020 Jul 14;32(2):107877. doi: 10.1016/j.celrep.2020.107877.

Abstract

Evolutionarily conserved SCAN (named after SRE-ZBP, CTfin51, AW-1, and Number 18 cDNA)-domain-containing zinc finger transcription factors (ZSCAN) have been found in both mouse and human genomes. Zscan4 is transiently expressed during zygotic genome activation (ZGA) in preimplantation embryos and induced pluripotent stem cell (iPSC) reprogramming. However, little is known about the mechanism of Zscan4 underlying these processes of cell fate control. Here, we show that Zscan4f, a representative of ZSCAN proteins, is able to recruit Tet2 through its SCAN domain. The Zscan4f-Tet2 interaction promotes DNA demethylation and regulates the expression of target genes, particularly those encoding glycolytic enzymes and proteasome subunits. Zscan4f regulates metabolic rewiring, enhances proteasome function, and ultimately promotes iPSC generation. These results identify Zscan4f as an important partner of Tet2 in regulating target genes and promoting iPSC generation and suggest a possible and common mechanism shared by SCAN family transcription factors to recruit ten-eleven translocation (TET) DNA dioxygenases to regulate diverse cellular processes, including reprogramming.

Keywords: SCAN domain; TET2; ZSCAN4; iPSCs; induced pluripotent stem cells; metabolic rewiring; proteasome function; stem cell potency.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Base Sequence
  • Cellular Reprogramming / genetics*
  • DNA / metabolism
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism*
  • Dioxygenases
  • Glycolysis / genetics
  • HEK293 Cells
  • Humans
  • Induced Pluripotent Stem Cells / metabolism
  • MCF-7 Cells
  • Mice, Inbred C57BL
  • Proteasome Endopeptidase Complex / metabolism
  • Protein Binding
  • Protein Domains
  • Proteostasis / genetics*
  • Proto-Oncogene Proteins / genetics
  • Proto-Oncogene Proteins / metabolism*
  • Transcription Factors / metabolism*
  • Transcription, Genetic*
  • Up-Regulation

Substances

  • DNA-Binding Proteins
  • Proto-Oncogene Proteins
  • Transcription Factors
  • ZSCAN4 protein, human
  • DNA
  • Dioxygenases
  • TET2 protein, human
  • Tet2 protein, mouse
  • Proteasome Endopeptidase Complex