AU-rich element-mediated mRNA decay via the butyrate response factor 1 controls cellular levels of polyadenylated replication-dependent histone mRNAs.

Incheol Ryu, Yoon Ki Kim

The Journal of biological chemistry 2019 May 10

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Replication-dependent histone (RDH) mRNAs have a nonpolyadenylated 3'-UTR that ends in a highly conserved stem-loop structure. Nonetheless, a subset of RDH mRNAs has a poly(A) tail under physiological conditions. The biological meaning of poly(A)-containing (+) RDH mRNAs and details of their biosynthesis remain elusive. Here, using HeLa cells and Western blotting, qRT-PCR, and biotinylated RNA pulldown assays, we show that poly(A)+ RDH mRNAs are post-transcriptionally regulated via adenylate- and uridylate-rich element-mediated mRNA decay (AMD). We observed that the rapid degradation of poly(A)+ RDH mRNA is driven by butyrate response factor 1 (BRF1; also known as ZFP36 ring finger protein-like 1) under normal conditions. Conversely, cellular stresses such as UV C irradiation promoted BRF1 degradation, increased the association of Hu antigen R (HuR; also known as ELAV-like RNA-binding protein 1) with the 3'-UTR of poly(A)+ RDH mRNAs, and eventually stabilized the poly(A)+ RDH mRNAs. Collectively, our results provide evidence that AMD surveils poly(A)+ RDH mRNAs via BRF1-mediated degradation under physiological conditions. © 2019 Ryu and Kim.

Citation

Incheol Ryu, Yoon Ki Kim. AU-rich element-mediated mRNA decay via the butyrate response factor 1 controls cellular levels of polyadenylated replication-dependent histone mRNAs. The Journal of biological chemistry. 2019 May 10;294(19):7558-7565