scholarly journals The Osa-containing SWI/SNF chromatin-remodeling complex regulates stem cell commitment in the adult Drosophila intestine

Development ◽  
2013 ◽  
Vol 140 (17) ◽  
pp. 3532-3540 ◽  
Author(s):  
X. Zeng ◽  
X. Lin ◽  
S. X. Hou
Keyword(s):  
Stem Cell ◽  
Chromatin Remodeling ◽  
Chromatin Remodeling Complex ◽  
Cell Commitment ◽  
Adult Drosophila

scholarly journals Actin-Related Protein 4 Interacts with PIE1 and Regulates Gene Expression in Arabidopsis

Genes ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 520
Author(s):  
Wenfeng Nie ◽  
Jinyu Wang
Keyword(s):  
Gene Expression ◽  
Plant Growth ◽  
Chromatin Remodeling ◽  
Leaf Size ◽  
Early Flowering ◽  
Physical Interaction ◽  
Loss Of Function ◽  
Single Nucleotide Change ◽  
Chromatin Remodeling Complex ◽  
Related Proteins

As essential structural components of ATP-dependent chromatin-remodeling complex, the nucleolus-localized actin-related proteins (ARPs) play critical roles in many biological processes. Among them, ARP4 is identified as an integral subunit of chromatin remodeling complex SWR1, which is conserved in yeast, humans and plants. It was shown that RNAi mediated knock-down of Arabidopsis thaliana ARP4 (AtARP4) could affect plant development, specifically, leading to early flowering. However, so far, little is known about how ARP4 functions in the SWR1 complex in plant. Here, we identified a loss-of-function mutant of AtARP4 with a single nucleotide change from glycine to arginine, which had significantly smaller leaf size. The results from the split luciferase complementation imaging (LCI) and yeast two hybrid (Y2H) assays confirmed its physical interaction with the scaffold and catalytic subunit of SWR1 complex, photoperiod-independent early flowering 1 (PIE1). Furthermore, mutation of AtARP4 caused altered transcription response of hundreds of genes, in which the number of up-regulated differentially expressed genes (DEGs) was much larger than those down-regulated. Although most DEGs in atarp4 are related to plant defense and response to hormones such as salicylic acid, overall, it has less overlapping with other swr1 mutants and the hta9 hta11 double-mutant. In conclusion, our results reveal that AtARP4 is important for plant growth and such an effect is likely attributed to its repression on gene expression, typically at defense-related loci, thus providing some evidence for the coordination of plant growth and defense, while the regulatory patterns and mechanisms are distinctive from other SWR1 complex components.

scholarly journals Interplay of BAF and MLL4 promotes cell type-specific enhancer activation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Young-Kwon Park ◽  
Ji-Eun Lee ◽  
Zhijiang Yan ◽  
Kaitlin McKernan ◽  
Tommy O’Haren ◽  
...  
Keyword(s):  
Cell Differentiation ◽  
Chromatin Remodeling ◽  
Direct Evidence ◽  
Cell Type ◽  
Chromatin Regulators ◽  
Chromatin Remodeling Complex ◽  
Histone H3k4 ◽  
Cell Type Specific ◽  
Pioneer Transcription Factor ◽  
Factor C

AbstractCell type-specific enhancers are activated by coordinated actions of lineage-determining transcription factors (LDTFs) and chromatin regulators. The SWI/SNF chromatin remodeling complex BAF and the histone H3K4 methyltransferase MLL4 (KMT2D) are both implicated in enhancer activation. However, the interplay between BAF and MLL4 in enhancer activation remains unclear. Using adipogenesis as a model system, we identify BAF as the major SWI/SNF complex that colocalizes with MLL4 and LDTFs on active enhancers and is required for cell differentiation. In contrast, the promoter enriched SWI/SNF complex PBAF is dispensable for adipogenesis. By depleting BAF subunits SMARCA4 (BRG1) and SMARCB1 (SNF5) as well as MLL4 in cells, we show that BAF and MLL4 reciprocally regulate each other’s binding on active enhancers before and during adipogenesis. By focusing on enhancer activation by the adipogenic pioneer transcription factor C/EBPβ without inducing cell differentiation, we provide direct evidence for an interdependent relationship between BAF and MLL4 in activating cell type-specific enhancers. Together, these findings reveal a positive feedback between BAF and MLL4 in promoting LDTF-dependent activation of cell type-specific enhancers.

scholarly journals The mammalian INO80 chromatin remodeling complex is required for replication stress recovery

2014 ◽  
Vol 42 (14) ◽  
pp. 9074-9086 ◽  
Author(s):  
Ivelina Vassileva ◽  
Iskra Yanakieva ◽  
Michaela Peycheva ◽  
Anastas Gospodinov ◽  
Boyka Anachkova
Keyword(s):  
Chromatin Remodeling ◽  
Replication Stress ◽  
Stress Recovery ◽  
Chromatin Remodeling Complex

scholarly journals Rvb1p/Rvb2p Recruit Arp5p and Assemble a Functional Ino80 Chromatin Remodeling Complex

2004 ◽  
Vol 16 (3) ◽  
pp. 465-477 ◽  
Author(s):  
Zophonı́as O. Jónsson ◽  
Sudhakar Jha ◽  
James A. Wohlschlegel ◽  
Anindya Dutta
Keyword(s):  
Chromatin Remodeling ◽  
Chromatin Remodeling Complex
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