UFL1 promotes histone H4 ufmylation and ATM activation

Nat Commun. 2019 Mar 18;10(1):1242. doi: 10.1038/s41467-019-09175-0.

Abstract

The ataxia-telangiectasia mutated (ATM) kinase, an upstream kinase of the DNA damage response (DDR), is rapidly activated following DNA damage, and phosphorylates its downstream targets to launch DDR signaling. However, the mechanism of ATM activation is still not completely understood. Here we report that UFM1 specific ligase 1 (UFL1), an ufmylation E3 ligase, is important for ATM activation. UFL1 is recruited to double strand breaks by the MRE11/RAD50/NBS1 complex, and monoufmylates histone H4 following DNA damage. Monoufmylated histone H4 is important for Suv39h1 and Tip60 recruitment. Furthermore, ATM phosphorylates UFL1 at serine 462, enhancing UFL1 E3 ligase activity and promoting ATM activation in a positive feedback loop. These findings reveal that ufmylation of histone H4 by UFL1 is an important step for amplification of ATM activation and maintenance of genomic integrity.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Acid Anhydride Hydrolases
  • Ataxia Telangiectasia Mutated Proteins / metabolism*
  • Cell Cycle Proteins / metabolism
  • Cell Line, Tumor
  • DNA Breaks, Double-Stranded
  • DNA Repair Enzymes / metabolism
  • DNA Repair*
  • DNA-Binding Proteins / metabolism
  • HEK293 Cells
  • Histones / metabolism*
  • Humans
  • Lysine Acetyltransferase 5 / metabolism
  • MRE11 Homologue Protein / metabolism
  • Methyltransferases / metabolism
  • Nuclear Proteins / metabolism
  • Phosphorylation / genetics
  • Protein Processing, Post-Translational / genetics*
  • RNA, Small Interfering / metabolism
  • Repressor Proteins / metabolism
  • Serine / metabolism
  • Ubiquitin-Protein Ligases / genetics
  • Ubiquitin-Protein Ligases / metabolism*

Substances

  • Cell Cycle Proteins
  • DNA-Binding Proteins
  • Histones
  • MRE11 protein, human
  • NBN protein, human
  • Nuclear Proteins
  • RNA, Small Interfering
  • Repressor Proteins
  • Serine
  • SUV39H1 protein, human
  • Methyltransferases
  • KAT5 protein, human
  • Lysine Acetyltransferase 5
  • Ubiquitin-Protein Ligases
  • ATM protein, human
  • Ataxia Telangiectasia Mutated Proteins
  • MRE11 Homologue Protein
  • Acid Anhydride Hydrolases
  • RAD50 protein, human
  • UFL1 protein, human
  • DNA Repair Enzymes