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Resources » Paper

Kinney B et al. (2023) Dev Cell "A circadian-like gene network programs the timing and dosage of heterochronic miRNA transcription during C. elegans development."

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  • Comments on Kinney B et al. (2023) Dev Cell "A circadian-like gene network programs the timing and dosage of heterochronic miRNA transcription during C. elegans development." (0)

  • Overview

    PMID:
    37643611
    DOI:
    10.1016/j.devcel.2023.08.006
    Status:
    Publication type:
    Journal_article
    WormBase ID:
    WBPaper00065936

    Kinney B, Sahu S, Stec N, Hills-Muckey K, Adams DW, Wang J, Jaremko M, Joshua-Tor L, Keil W, & Hammell CM (2023). A circadian-like gene network programs the timing and dosage of heterochronic miRNA transcription during C. elegans development. Dev Cell. doi:10.1016/j.devcel.2023.08.006

    Development relies on the exquisite control of both the timing and the levels of gene expression to achieve robust developmental transitions. How cis- and trans-acting factors control both aspects simultaneously is unclear. We show that transcriptional pulses of the temporal patterning microRNA (miRNA) lin-4 are generated by two nuclear hormone receptors (NHRs) in C. elegans, NHR-85 and NHR-23, whose mammalian orthologs, Rev-Erb and ROR, function in the circadian clock. Although Rev-Erb and ROR antagonize each other to control once-daily transcription in mammals, NHR-85/NHR-23 heterodimers bind cooperatively to lin-4 regulatory elements to induce a single pulse of expression during each larval stage. Each pulse's timing, amplitude, and duration are dictated by the phased expression of these NHRs and the C. elegans Period ortholog, LIN-42, that binds to and represses NHR-85. Therefore, during nematode temporal patterning, an evolutionary rewiring of circadian clock components couples the timing of gene expression to the control of transcriptional dosage.

    Authors: Kinney B, Sahu S, Stec N, Hills-Muckey K, Adams DW, Wang J, Jaremko M, Joshua-Tor L, Keil W, Hammell CM


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