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Biogenesis and regulation of the let-7 miRNAs and their functional implications

Open access
Lee, Hosuk, Han, Sungwook, Kwon, Chang Seob, Lee, Daeyoup·2016·Protein & Cell

Abstract

The let-7 miRNA was one of the first miRNAs discovered in the nematode, Caenorhabditis elegans, and its biological functions show a high level of evolutionary conservation from the nematode to the human. Unlike in C. elegans, higher animals have multiple isoforms of let-7 miRNAs; these isoforms share a consensus sequence called the 'seed sequence' and these isoforms are categorized into let-7 miRNA family. The expression of let-7 family is required for developmental timing and tumor suppressor function, but must be suppressed for the self-renewal of stem cells. Therefore, let-7 miRNA biogenesis must be carefully controlled. To generate a let-7 miRNA, a primary transcript is produced by RNA polymerase II and then subsequently processed by Drosha/DGCR8, TUTase, and Dicer. Because dysregulation of let-7 processing is deleterious, biogenesis of let-7 is tightly regulated by cellular factors, such as the RNA binding proteins, LIN28A/B and DIS3L2. In this review, we discuss the biological functions and biogenesis of let-7 miRNAs, focusing on the molecular mechanisms of regulation of let-7 biogenesis in vertebrates, such as the mouse and the human.

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Metadata

Authors
Lee, H., Han, S., Kwon, C. S., & Lee, D.
Venue
Protein & Cell
Published
2015-09-23
Volume
7
Issue
2
Pages
100-113
ISSN
  • 1674-800X (ISSN-L)
  • 1674-8018
OpenAlex
W1902711869
Cited by
330
References
10
FWCI
5.59
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Biogenesis and regulation of the let-7 miRNAs and their functional implications. https://app.cochat.ai/papers/10.1007/s13238-015-0212-y
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Lee, H., Han, S., Kwon, C. S., & Lee, D. (2016). Biogenesis and regulation of the let-7 miRNAs and their functional implications. Protein & Cell. https://doi.org/10.1007/s13238-015-0212-y

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