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The splicing factor PRP31 is involved in transcriptional gene silencing and stress response in Arabidopsis

ABSTRACT: To study how PRP31, ZOP1 and STA1 affect gene expression and pre-mRNA splicing, we performed RNA deep sequencing for the seedlings materials C24, prp31, zop1, and sta1 mutants.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE63757 | GEO | 2015/03/02

SECONDARY ACCESSION(S): PRJNA269009

REPOSITORIES: GEO

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The splicing factor PRP31 is involved in transcriptional gene silencing and stress response in Arabidopsis

Project description:To study how PRP31, ZOP1 and STA1 affect gene expression and pre-mRNA splicing, we performed RNA deep sequencing for the seedlings materials C24, prp31, zop1, and sta1 mutants. Compare the mRNA profiles of 10-day old seedlings materials of mutants (prp31, zop1 and sta1) to wild type C24 by Illumina suquencing.

2015-03-02 | E-GEOD-63757 | biostudies-arrayexpress

The cytosolic iron-sulfur cluster assembly protein MMS19 regulates transcriptional gene silencing, DNA repair, and flowering time in Arabidopsis

Project description:To study how MMS19 and ABO4 affect gene expression, we performed RNA deep sequencing for the seedlings materials Col, mms19-1,and abo4 mutants.

2015-04-09 | GSE67669 | GEO

The cytosolic iron-sulfur cluster assembly protein MMS19 regulates transcriptional gene silencing, DNA repair, and flowering time in Arabidopsis

Project description:To study how MMS19 and ABO4 affect gene expression, we performed RNA deep sequencing for the seedlings materials Col, mms19-1,and abo4 mutants. Compare the mRNA profiles of 14-day old seedlings materials of mutants (mms19-1 and abo4) to wild type Col by Illumina suquencing.

2015-04-09 | E-GEOD-67669 | biostudies-arrayexpress

A coilin mutant provides a sensitized system for identifying modifiers of alternative splicing and posttranscriptional gene silencing in Arabidopsis thaliana

Project description:Coilin is a scaffold protein essential for the structural integrity of Cajal Bodies, which are non-membranous nuclear organelles that are thought to facilitate assembly and maturation of nuclear RNPs, including spliceosomal snRNPs. To investigate further coilin’s functions in plant cells, and to identify proteins that may functionally interact with coilin, we performed a genetic suppressor screen in Arabidopsis thaliana using a coilin (coi) mutant displaying altered splicing of a GFP pre-mRNA. The modified splicing pattern results in a ‘hyper-GFP’ phenotype in young coi seedlings relative to the intermediate level of GFP in wild-type seedlings. Additionally, in newly emerging leaves of older coi seedlings, the GFP gene frequently undergoes abrupt siRNA-associated posttranscriptional gene silencing that persists during growth. In the suppressor screen, we searched for mutations that subdue one or both of these GFP phenotypes and identified several understudied factors in plants: WRAP53, a putative Cajal body protein; SMU2, a predicted splicing-related factor; and ZC3HC1, an uncharacterized zinc finger protein. All three mutations return the hyper-GFP phenotype of the coi mutant to approximately the intermediate wild-type level. The zc3hc1 mutations in particular induce premature and more extensive posttranscriptional gene silencing similar to mutations in SOP1 and DCL4, which are known modifiers of posttranscriptional gene silencing. Candidate coilin-interacting proteins identified by immunoprecipitation-mass spectrometry include many splicing-related factors, nucleolar proteins, and mRNA export factors. Our results demonstrate the usefulness of the coi mutant to identify new modifiers of alternative splicing and posttranscriptional gene silencing, and suggest diverse roles for coilin in plant cells.

2023-07-27 | PXD027146 | Pride

Genome-wide survey of cold stress regulated alternative splicing in Arabidopsis thaliana

Project description:Alternative splicing plays a major role in expanding the potential informational content of eukaryotic genomes. It is an important post-transcriptional regulatory mechanism that can increase protein diversity and affect mRNA stability. Cold stress, which adversely affects plants growth and development, regulates the transcription and splicing of plants splicing factors. This affects the pre-mRNA processing of many genes. To identify cold regulated alternative splicing we applied Affymetrix Arabidopsis tiling arrays to survey the transcriptome under cold treatment conditions. Two-week old Arabidopsis seedlings grown on agar were subjected to 24 hours of cold (4Â°C) treatment under long day conditions. Control and cold-treated plants were harvested at the same time to ensure that observed differences would not be due to circadian clock effects on transcripts. Total RNA from four biological repeats were used for microarray hybridization.

2013-05-12 | E-GEOD-35996 | biostudies-arrayexpress

RNA-seq analysis of alternative splicing between two Arabidopsis accessions and its inheritance in hybrid

Project description:To uncover the possible regulatory mechanism in regulatory alternative splicing in plants evolution, we used RNA-seq to compare the transcriptomes in Arabidopsis ecotypes Col and C24. We found different class of AS types have different regulatory mechanisms in Arabidopsis and divergence of alternative splicing in different class is varied in evolution. Sequence variation analysis had found evolution divergent AS events significantly altered their sequences compared to conserved events and the variation is AS class specific.

2018-04-23 | GSE62478 | GEO

h3k27me3_cvi-Analysis of epigenomic changes in hybrids Arabidopsis thaliana Col-0, C24 and Cvi accessions

Project description:a2e_heterosis - h3k27me3_cvi - Arabidopsis thaliana accessions (Col-0, C24 and Cvi) and their hybrid were used to investigate the dynamics of the epigenome after intraspecific hybridization between - H3K27me3 profiling in Cvi seedlings

2011-05-17 | GSE25051 | GEO

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

Argonaute proteins couple chromatin silencing to alternative splicing (RNA IP-Seq)

Project description:While Argonaute (AGO) proteins play a major role in transcriptional gene silencing (TGS) in many organisms, their role in the nucleus of somatic mammalian cells remains elusive. Here, we have purified AGO1 and AGO2 chromatin-embedded complexes, and found these proteins associated with previously described partners, but also with chromatin modifiers and, rather unexpectedly, with different splicing factors. Using the CD44 gene as a model for alternative splicing, we show that both AGO1 and AGO2 are required for Protein Kinase C (PKC)-dependent variant exon inclusion. AGO proteins facilitate the spliceosome recruitment and modulate the elongation rate of RNA polymerase II (RNAPII). The recruitment of AGO proteins to CD44 transcribed region is dependent on both the endonuclease Dicer and the chromodomain-containing protein HP1g, and results in locally increased levels of histone H3 lysine 9 (H3K9) methylation on variant exons. Genome wide analysis of splicing in either AGO2 or Dicer null cells showed that the two proteins have similar effects on many splicing events. Finally, sRNAs associated with nuclear AGO2 are mostly in sense orientation relative to protein-coding genes, supporting a role for intragenic antisense non-coding RNAs in the recruitment AGO and splicing factors. Together, our data demonstrate for the first time that the endogenous RNAi pathway is involved in alternative splicing decisions, unravelling a new model in which AGO proteins couple RNAPII elongation and chromatin modification. Deep sequencing of small RNAs (approx. 15-80 nucleotides) bound to either cytoplasmic or chromatin-associated AGO2 complex.

2012-09-10 | E-GEOD-39748 | biostudies-arrayexpress

Global co-transcriptional splicing in Arabidopsis and the correlation with splicing regulation in mature RNAs

Project description:RNA splicing and spliceosome assembly in eukaryotes occur mainly during transcription. However, co-transcriptional splicing has not yet been explored in plants. Here, we showed that in Arabidopsis thaliana, nearly all introns undergo co-transcriptional splicing and this occurs with higher efficiency for introns in protein-coding genes than for noncoding RNAs. Co-transcriptional splicing efficiency correlates with density of 19 epigenetic modifications. Total intron number and intron position are two predominant sequence features that correlate with co-transcriptional splicing efficiency, and introns with alternative 5′ or 3′ splice sites are less efficiently spliced. Furthermore, we found that trans-acting protein mutations lead to more introns with increased splicing defects in nascent RNAs than in mature RNAs, and that introns with increased splicing defects in mature RNAs are inefficiently spliced at the co-transcriptional level. Our results not only uncovered widespread co-transcriptional splicing in Arabidopsis, but also uncovered features that may affect or be affected by co-transcriptional splicing efficiency.

2019-11-25 | GSE126064 | GEO

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