1. ZC3H14 facilitates backsplicing by binding to exon-intron boundary and 3' UTR.
- Author
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Li Q, Yang G, Ren B, Liu X, Tang LQ, Shi Q, Shan G, and Wang X
- Subjects
- Animals, Humans, Male, Mice, Mice, Knockout, Testis metabolism, Spliceosomes metabolism, Spliceosomes genetics, Saccharomyces cerevisiae genetics, Saccharomyces cerevisiae metabolism, RNA Splicing, Azoospermia genetics, Azoospermia metabolism, Azoospermia pathology, Saccharomyces cerevisiae Proteins genetics, Saccharomyces cerevisiae Proteins metabolism, HEK293 Cells, Protein Binding, RNA, Circular genetics, RNA, Circular metabolism, Introns, RNA-Binding Proteins genetics, RNA-Binding Proteins metabolism, Exons, 3' Untranslated Regions, Spermatogenesis genetics
- Abstract
Circular RNAs (circRNAs) are natural outputs of eukaryotic transcription and RNA processing and have emerged as critical regulators in physiology and diseases. Although multiple cis-elements and trans-factors are reported to modulate the backsplicing of circRNA biogenesis, most of these regulations play roles in flanking introns of circRNAs. Here, using a genome-wide CRISPR knockout screen, we have identified an evolutionarily conserved RNA-binding protein ZC3H14 in regulating circRNA biogenesis. ZC3H14 binds to 3' and 5' exon-intron boundaries and 3' UTRs of cognate mRNAs to promote circRNA biogenesis through dimerization and the association with spliceosome. Yeast knockout of the ZC3H14 ortholog Nab2 has significantly lower levels of circRNAs. Zc3h14
-/- mice exhibit disrupted spermatogenesis and reduced testicular circRNA levels. Additionally, expression levels of human ZC3H14 are associated with non-obstructive azoospermia. Our findings reveal a conserved requirement for ZC3H14 in the modulation of backsplicing and link ZC3H14 and circRNA biogenesis to male fertility., Competing Interests: Declaration of interests G.S., X.W., and Q.L. have an ownership interest in a patent related to this research., (Copyright © 2024 The Author(s). Published by Elsevier Inc. All rights reserved.)- Published
- 2024
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