Identification, characterization, and functional prediction of circular RNAs in maize.
Mol Genet Genomics
; 295(2): 491-503, 2020 Mar.
Article
en En
| MEDLINE
| ID: mdl-31894398
ABSTRACT
Circular RNAs (circRNAs) are a new type of intracellular regulator that have been widely identified in animals and plants by high-throughput sequencing. However, there are still few functional studies on circRNAs in plants. To better understand maize circRNAs and their potential functions, we identified 1199 circRNAs in maize from RiboMinus RNA-Seq transcriptome data, and found distinct features of splicing site selection bias, longer flanking introns, and miniature inverted-repeat transposable element (MITE) insertions in flanking introns in maize circRNAs compared to other plant circRNAs. In total, 31 and 36 orthologous circRNAs were identified in rice and maize, respectively, but the orthologous parental genes could not produce orthologous circRNAs, mostly because of long-sequence insertions/deletions at flanking introns and approximately 24.3% of them contained MITE sequences. The majority of maize circRNAs showed high diversity of expression under different treatments and/or in different genetic backgrounds, implying that circRNAs could be involved in various regulatory networks. Twenty-six ecircRNAs were predicted to contain one or more target mimics, and 229 circRNAs had high coding potential, indicating that circRNAs could perform peptide-encoding functions in plants. These results will broaden understanding of the roles of circRNAs in plants and support further functional work on maize.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
ARN de Planta
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Zea mays
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Transcriptoma
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ARN Circular
Tipo de estudio:
Diagnostic_studies
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Prognostic_studies
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Risk_factors_studies
Idioma:
En
Año:
2020
Tipo del documento:
Article