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Maf1 regulates intracellular lipid homeostasis in response to DNA damage response activation.

Amy M Hammerquist | Wilber Escorcia | Sean P Curran
Molecular biology of the cell | 2021

Surveillance of DNA damage and maintenance of lipid metabolism are critical factors for general cellular homeostasis. We discovered that in response to DNA damage-inducing UV light exposure, intact Caenorhabditis elegans accumulate intracellular lipids in a dose-dependent manner. The increase in intracellular lipids in response to exposure to UV light utilizes mafr-1, a negative regulator of RNA polymerase III and the apical kinases atm-1 and atl-1 of the DNA damage response (DDR) pathway. In the absence of exposure to UV light, the genetic ablation of mafr-1 results in the activation of the DDR, including increased intracellular lipid accumulation, phosphorylation of ATM/ATR target proteins, and expression of the Bcl-2 homology region genes, egl-1 and ced-13. Taken together, our results reveal mafr-1 as a component the DDR pathway response to regulating lipid homeostasis following exposure to UV genotoxic stress.

Pubmed ID: 33788576

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Associated grants

  • Agency: NIA NIH HHS, United States
    Id: T32 AG000037
  • Agency: NIH HHS, United States
    Id: P40 OD010440
  • Agency: NIA NIH HHS, United States
    Id: T32 AG052374
  • Agency: NIA NIH HHS, United States
    Id: R01 AG058610
  • Agency: NIGMS NIH HHS, United States
    Id: R01 GM109028

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Caenorhabditis Genetics Center (tool)

RRID:SCR_007341

Center that acquires, maintains, and distributes genetic stocks and information about stocks of the small free-living nematode Caenorhabditis elegans for use by investigators initiating or continuing research on this genetic model organism. A searchable strain database, general information about C. elegans, and links to key Web sites of use to scientists, including WormBase, WormAtlas, and WormBook are available.

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VC728 (tool)

RRID:WB-STRAIN:WBStrain00036017

Caenorhabditis elegans with name atl-1(ok1063) V. from WB.

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N2_(ancestral) (tool)

RRID:WB-STRAIN:WBStrain00000003

Caenorhabditis elegans with name C. elegans wild type (ancestral). from WB.

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VC381 (tool)

RRID:WB-STRAIN:WBStrain00035722

Caenorhabditis elegans with name atm-1(gk186) I. from WB.

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