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Arabidopsis thaliana

ABSTRACT: SPLICING FACTOR FOR PHYTOCHROME SIGNALING promotes photomorphogenesis by regulating alternative splicing in Arabidopsis

PROVIDER: PRJNA339647 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR4046130_1.fastq.gz	Fastqsanger.gz
	SRR4046130_2.fastq.gz	Fastqsanger.gz
	SRR4046140_1.fastq.gz	Fastqsanger.gz
	SRR4046140_2.fastq.gz	Fastqsanger.gz
	SRR4046131_1.fastq.gz	Fastqsanger.gz

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Arabidopsis thaliana

Project description:Photomorphogenesis of Arabidopsis seedlings is accompanied by complex alternative splicing alterations

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Project description:Seedling photomorphogenesis is a sophisticated developmental process that is controlled by both the transcriptional and posttranscriptional regulation of gene expression. Here, we identify an Arabidopsis noncoding RNA, designated HIDDEN TREASURE 1 (HID1), as a new factor promoting photomorphogenesisin continuous red light (cR). We show that HID1 acts through PHYTOCHROME-INTERACTING FACTOR 3 (PIF3), a bHLH transcription factor known to be a key repressor of photomorphogenesis.

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Splicing factor SRSF1 promotes breast cancer progression via regulating alternative splicing

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NPR1 promotes blue light–induced plant photomorphogenesis by ubiquitinating and degrading PIF4

Project description:Light is a major determinant of plant growth and survival. NONEXPRESSER OF PATHOGENESIS-RELATED GENES 1 (NPR1) acts as a receptor for salicylic acid (SA) and serves as the key regulator of SA-mediated immune responses. However, the mechanisms by which plants integrate light and SA signals in response to environmental changes, as well as the role of NPR1 in regulating plant photomorphogenesis, remain poorly understood. This study shows that SA promotes plant photomorphogenesis by regulating PHYTOCHROME INTERACTING FACTOR 4 (PIF4). Specifically, NPR1 promotes photomorphogenesis under blue light by facilitating the degradation of PIF4 through light-induced polyubiquitination. NPR1 acts as a substrate adaptor for the CULLIN3-based E3 ligase, which ubiquitinates PIF4 at Lys129, Lys252, and Lys428, and leading to PIF4 degradation via the 26S proteasome pathway. Genetically, PIF4 is epistatic to NPR1 in the regulation of blue light-–induced photomorphogenesis, suggesting it acts downstream of NPR1. Furthermore, cryptochromes mediate the polyubiquitination of PIF4 by NPR1 in response to blue light by promoting the interaction and ubiquitination between NPR1 and PIF4. Transcriptome analysis revealed that, under blue light, NPR1 and PIF4 coordinately regulate numerous downstream genes related to light and auxin signaling pathways. Overall, these findings unveil a role for NPR1 in photomorphogenesis, highlighting a mechanism for post-translational regulation of PIF4 in response to blue light. This mechanism plays a pivotal role in the fine-tuning of plant development, enabling plants to adapt to complex environmental changes.

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Project description:Arabidopsis thaliana cäö alternative splicing

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SPLICING FACTOR FOR PHYTOCHROME SIGNALING promotes photomorphogenesis by regulating alternative splicing in Arabidopsis

Project description:Purpose: The goals of this study are to compare the transcriptome profiling and alternative splicing (AS) profiling between Col-0 wild type and SFPS knockout mutant (sfps-2) through RNA-seq to determine the molecular mechanisms of how splicing factor SFPS regulates photomorphogenesis in Arabidopsis. Results: Using an optimized data analysis workflow, we mapped about 100 million sequence reads per sample to the Arabidopsis genome (TAIR10) and identified 1495 differentially expressed genes between Col-0 and mutant dark samples; 1361 differentially expressed genes between Col-0 and mutant red light treated samples; 4291 differentially expressed genes between Col-0 dark and red light treated samples; and 4479 differentially expressed genes between mutant dark and red light treated samples. Except for gene expression, we also discovered 788 differentially spliced bins between Col-0 and mutant dark samples; 827 differentially spliced bins between Col-0 and mutant red light treated samples; 610 differentially spliced bins between Col-0 dark and red light treated samples; and 405 differentially spliced bins between mutant dark and red light treated samples. Altered splicing of 9 genes was confirmed with qRT-PCR, demonstrating the high degree of sensitivity of the RNA-seq method. Conclusions: Our study represents the first detailed analysis of SFPS mutant transcriptomes, with biologic replicates, generated by RNA-seq technology. Our results show that SFPS regulates photomorphogenesis in Arabidopisis through regulating the splicing activity of light signaling genes, which helps us.

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Photomorphogenesis of Arabidopsis seedlings is accompanied by complex alternative splicing alterations

Project description:We analyzed transcriptome-wide gene expression and AS changes in etiolated Arabidopsis seedlings exposed to red, blue, and white light. Our study revealed that different types of light signals trigger rapid AS responses of numerous genes, including splicing factors and other functional groups. Among these candidates was RRC1, which was previously shown to function in PHYB signaling. The light signaling phenotype of an rrc1 mutant could only be complemented with the splicing variant being up-regulated upon light exposure, indicating a self-reinforcing circuit. Finally, we provide evidence that light-regulated AS can occur in a phytochrome-independent manner and is closely intertwined with the plantâ??s energy status. Analysis of alternative splicing patterns of dark-grown Arabidopsis seedlings exposed for 1 or 6 hours to white, blue, or red light, or kept in darkness; all samples in duplicates

2016-10-23 | E-GEOD-70575 | biostudies-arrayexpress

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Project description:Divergence of alternative splicing in Arabidopsis

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Project description:Two Arabidopsis thaliana splicing factor [AtU2AF65 isoforms (AtU2AF65a and AtU2AF65b)] mutants displayed the opposite flowering phenotypes. To assay the RNA processing including alternative splicing and pre-mRNA splicing of target genes of this protein in Arabidopsis, the 7-day seedlings (shoot apices) of wild type atu2af65a and atu2af65b mutants were used for RNA-Seq.

2023-05-01 | E-MTAB-12648 | biostudies-arrayexpress

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