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Updated: Nov 9, 2025

Electrophysiological Assessment of Murine Atria with High-Resolution Optical Mapping
Published on: February 22, 2018
UV-induced activation of ATR is mediated by UHRF2
Shunsuke Hanaki1, Makoto Habara1, Midori Shimada1
1Department of Veterinary Biochemistry, Yamaguchi University, Yamaguchi City, Japan.
Abstract:
UHRF1 (Ubiquitin-like with PHD and ring finger domains 1) regulates DNA methylation and histone modifications and plays a key role in cell proliferation and the DNA damage response. However, the function of UHRF2, a paralog of UHRF1, in the DNA damage response remains largely unknown. Here, we show that UHRF2 is essential for maintaining cell viability after UV irradiation, as well as for the proliferation of cancer cells. UHRF2 was found to physically interact with ATR in a DNA damage-dependent manner through UHRF2's TTD domain. In addition, phosphorylation of threonine at position 1989, which is required for UV-induced activation of ATR, was impaired in cells depleted of UHRF2, suggesting that UHRF2 is essential in ATR activation. In conclusion, these results suggest a new regulatory mechanism of ATR activation mediated by UHRF2.
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