Parallel degradome-seq and DMS-MaPseq substantially revise the miRNA biogenesis atlas in Arabidopsis.
Nat Plants
; 10(7): 1126-1143, 2024 07.
Article
en En
| MEDLINE
| ID: mdl-38918606
ABSTRACT
MicroRNAs (miRNAs) are produced from highly structured primary transcripts (pri-miRNAs) and regulate numerous biological processes in eukaryotes. Due to the extreme heterogeneity of these structures, the initial processing sites of plant pri-miRNAs and the structural rules that determine their processing have been predicted for many miRNAs but remain elusive for others. Here we used semi-active DCL1 mutants and advanced degradome-sequencing strategies to accurately identify the initial processing sites for 147 of 326 previously annotated Arabidopsis miRNAs and to illustrate their associated pri-miRNA cleavage patterns. Elucidating the in vivo RNA secondary structures of 73 pri-miRNAs revealed that about 95% of them differ from in silico predictions, and that the revised structures offer clearer interpretation of the processing sites and patterns. Finally, DCL1 partners Serrate and HYL1 could synergistically and independently impact processing patterns and in vivo RNA secondary structures of pri-miRNAs. Together, our work sheds light on the precise processing mechanisms of plant pri-miRNAs.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Arabidopsis
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ARN de Planta
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Proteínas de Arabidopsis
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MicroARNs
Idioma:
En
Revista:
Nat Plants
Año:
2024
Tipo del documento:
Article
País de afiliación:
Estados Unidos