Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA360954 | ENA |
REPOSITORIES: ENA
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Project description:Comparison of gene expression profiles between CD138+ and CD138- populations from human myeloma cell lines RPMI-8226 and NCI-H929. We used Affymetrix human gene 1.0ST array and analyzed with GeneSpring GX.
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Project description:The conserved SR-like protein Npl3 promotes the splicing of diverse pre-mRNAs. However, the RNA sequence(s) recognized by the RNA Recognition Motifs (RRM1 & RRM2) of Npl3 during the splicing reaction remain elusive. Here, we developed a split-iCRAC approach in vivo to determine the consensus sequence bound to each RRM in yeast. High-resolution NMR structures show that RRM2 recognizes a 5´-GNGG-3´ motif leading to an unusual mille-feuille topology. In addition, our data indicate a non-specific interaction of the RS domain with RNA. These structures reveal how RRM1 preferentially interacts with a CC-dinucleotide upstream of this motif, and how the inter-RRM linker and the region C-terminal to RRM2 contributes to cooperative RNA-binding. Structure-guided studies show that Npl3 genetically interacts with U2 snRNP specific factors and we provide evidence that Npl3 melts U2 snRNA stem-loop I, a prerequisite for U2/U6 duplex formation within the catalytic centre of the Bact spliceosomal complex. Our findings provide a mechanistic role for Npl3 during spliceosome active site formation.
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Project description:To understand how mutations in Matrin 3 (MATR3) cause amyotrophic lateral sclerosis (ALS) and distal myopathy, we used transcriptome and interactome analysis. We found over-expression of wild-type (WT) or F115C mutant MATR3 had little impact on gene expression in neuroglia cells. We identified ~123 proteins that bound MATR3, with proteins associated with stress granules and RNA processing/splicing being prominent. The interactome of myopathic S85C and ALS-variant F115C MATR3 were virtually identical to WT protein. Deletion of RNA recognition motif (RRM1) or Zn finger motifs (ZnF1 or ZnF2) diminished the binding of a subset of MATR3 interacting proteins. Remarkably, deletion of the RRM2 motif caused enhanced binding of >100 hundred proteins. In live cells, MATR3 lacking RRM2 (ΔRRM2) formed intranuclear spherical structures that fused over time into large structures. Our findings in the cell models used here suggest that MATR3 with disease-causing mutations is not dramatically different from WT protein in modulating gene regulation or in binding to normal interacting partners. The intra-nuclear localization and interaction network of MATR3 is strongly modulated by its RRM2 domain.
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Project description:Gene expression profiles for ~20,000 genes using Illumina Homo sapiensRef-8 v2
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Project description:Comparison of gene expression profiles between CD138+ and CD138- populations from human myeloma cell lines RPMI-8226 and NCI-H929. We used Affymetrix human gene 1.0ST array and analyzed with GeneSpring GX. CD138+ and CD138- subsets of cells were separated using FACS and clonogenecity of both population were compared. The RNA was extracted and hybridized with Affymetrix Human Gene 1.0ST array.
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