HnRNP Q and PTB Modulate the Circadian Oscillation of Mouse Rev-erb Alpha Via IRES-mediated Translation
Overview
Affiliations
The physiological and behavioral circadian rhythms of most creatures are controlled by a harmony of functional relationships between clock genes. In mammals, several core clock genes show rhythmic profiles of their mRNA and protein expression. Among them, Rev-erb α functions as a transcriptional repressor, affecting expression patterns of other clock genes. For the continuous and robust oscillation of the molecular clock system, the levels of Rev-erb α protein are expected to be tightly regulated with the correct timing. Here, we demonstrate that Rev-erb α has an internal ribosomal entry site (IRES) in its 5' untranslated region. Furthermore, we demonstrate that heterogeneous nuclear ribonucleoprotein Q and polypyrimidine tract-binding protein (PTB) modulate the IRES-mediated translation of Rev-erb α. We suggest that the rhythmic binding affinity of hnRNP Q to the Rev-erb α IRES and the change in PTB cytosolic levels lead to maintenance of the oscillation profile of the Rev-erb α protein.
SYNCRIP promotes cell cycle progression and lung tumorigenesis by modulating AURKB translation.
Kim H, Ryu H, Kang M, Lee N, Kim H, Lee D Cancer Commun (Lond). 2024; 45(2):138-142.
PMID: 39639599 PMC: 11833668. DOI: 10.1002/cac2.12634.
Circadian regulation of translation.
Lyu J, Zhuang Y, Lin Y RNA Biol. 2024; 21(1):14-24.
PMID: 39324589 PMC: 11441039. DOI: 10.1080/15476286.2024.2408524.
Circadian ribosome profiling reveals a role for the upstream open reading frame in sleep.
Millius A, Yamada R, Fujishima H, Maeda K, Standley D, Sumiyama K Proc Natl Acad Sci U S A. 2023; 120(40):e2214636120.
PMID: 37769257 PMC: 10556633. DOI: 10.1073/pnas.2214636120.
Qi X, Yan Q, Shang Y, Zhao R, Ding X, Gao S Cell Death Differ. 2022; 29(11):2233-2246.
PMID: 35538151 PMC: 9613757. DOI: 10.1038/s41418-022-01011-1.
CNOT1 regulates circadian behaviour through mRNA decay in a deadenylation-dependent manner.
Mohamed H, Takahashi A, Nishijima S, Adachi S, Murai I, Okamura H RNA Biol. 2022; 19(1):703-718.
PMID: 35510877 PMC: 9090297. DOI: 10.1080/15476286.2022.2071026.