Arid lands soils
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ABSTRACT:
PROVIDER: PRJNA898826 | ENA |
REPOSITORIES: ENA
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Project description:The Dual Use Of Solar Power Plants As Biocrust Nurseries For Large-Scale Arid Soil Restoration
| PRJNA899057 | ENA
Project description:Every known SWI/SNF chromatin-remodeling complex incorporates an ARID DNA binding domain-containing subunit. Despite being a ubiquitous component of these complexes, physiological roles for this domain remain undefined. We screened an N-ethyl-N-nitrosurea (ENU) mutagenized library for ARID domain point mutations and generated an Arid1a/Baf250a hypomorphic allele. The mutant ARID1a (V1068G) protein is stably expressed at wild-type levels, and it is capable of assembling into a SWI/SNF complex with in vitro mononucleosome disruption activity. However, its capacity to bind DNA is lost. Consistent with defective DNA binding, mutant protein occupancy at known SWI/SNF target genes is decreased. Loss of DNA binding is associated with concurrent changes in SWI/SNF target gene expression. Mutant embryos manifest heart defects, fail to establish proper yolk sac vasculature, and exhibit hemorrhaging. As a result of these phenotypes, mutant embryos fail to establish proper circulation, culminating in ischemic arrest in utero between days 9.5 and 11.5. These data support a role for ARID1a-containing, BAF-A complexes in heart and extraembryonic vascular development, and indicate the ARID domain of ARID1a is essential in this regard. Hence, intrinsic ARID subunit-DNA interactions are required for normal SWI/SNF function in vivo. Four-condition experiment, wild-type vs Baf250a/Arid1a^V1068G/V1068G yolk sacs isolated at E8.5 and E9.5. Biological replicates: 3 per condition.
2012-01-15 | E-GEOD-32116 | biostudies-arrayexpress
Project description:Every known SWI/SNF chromatin-remodeling complex incorporates an ARID DNA binding domain-containing subunit. Despite being a ubiquitous component of the complex, physiological roles for this domain remain undefined. Here we show that disruption of ARID1a-DNA binding in mice results in embryonic lethality, with mutant embryos manifesting prominent defects in the heart and extraembryonic vasculature. The DNA binding defective mutant ARID1a subunit is stably expressed and capable of assembling into a SWI/SNF complex with chromatin remodeling activity, but promoter occupancy by ARID1a-containing, SWI/SNF complexes (BAF-A) is impaired. Depletion of ARID domain-dependent, BAF-A associations at THROMBOSPONDIN 1 (THBS1) led to the concomitant upregulation of this anti-angiogenic protein. Using a THBS1 promoter-reporter gene, we further show that BAF-A directly regulates THBS1 promoter activity in an ARID domain-dependent manner. Our data not only demonstrate that ARID-DNA interactions are physiologically relevant in higher eukaryotes, but also indicate these interactions can facilitate SWI/SNF binding to target sites in vivo. These findings support the model wherein cooperative interactions among intrinsic subunit-chromatin interaction domains and sequence-specific transcription factors drive SWI/SNF recruitment.
2012-01-15 | GSE32116 | GEO
Project description:Soil microbial in arid and semi-arid ecosystem Raw sequence reads
| PRJNA883931 | ENA
Project description:Soil microbial in arid and semi-arid ecosystem Raw sequence reads
| PRJNA1067364 | ENA
Project description:Optimizing production of nursery-based biological soil crusts for restoration of arid land soils Raw sequence reads
| PRJNA515304 | ENA
Project description:ARID (AT-rich interacting domain) proteins are a heterogeneous family of DNA-binding proteins involved in transcriptional regulation. No precise DNA-binding preferences have yet been defined for the aberrant member Arid5a. In addition, the protein binds to mRNA motifs for transcript stabilisation, presumably through the DNA-binding ARID domain. Here we first provide an unbiased definition of RNA motifs and a clear breakdown of nucleic acid binding by the ARID domain. An RNA Bind-n-Seq (RBNS) experiment was performed to find a consensus motif of the Arid5a domain. It reveals a preference for an unexpected CAGGCAG consensus motif, accompanied by a general preference for AU-rich motifs.
2024-03-21 | GSE256029 | GEO
Project description:Heat resistant ascomycetes from semi-arid soils from Argentina
| PRJEB23768 | ENA
Project description:Chromatin remodeling and histone modifications are important for development and floral phase transition in plants. However, it is largely unknown whether and how these two epigenetic regulators coordinately regulate the important biological processes. Here, we identified three types of ISWI chromatin remodeling complexes in Arabidopsis thaliana. We found that ARID5, a subunit of a plant-specific ISWI complex, can regulate development and floral phase transition. The ARID-PHD dual domain cassette of ARID5 recognizes both the H3K4me3 histone mark and AT-rich DNA. We determined the ternary complex structure of the ARID5 ARID-PHD cassette with an H3K4me3 peptide and an AT-containing DNA. The H3K4me3 peptide is combinatorially recognized by the PHD and ARID domains, while the DNA is specifically recognized by the ARID domain. Both PHD and ARID domains are necessary for the association of ARID5 with chromatin. The results suggest that the dual recognition of AT-rich DNA and H3K4me3 by the ARID5 ARID-PHD cassette may facilitate the association of the ISWI complex with specific chromatin regions to regulate development and floral phase transition
2019-11-01 | GSE139637 | GEO