A combinatorial approach to uncover a novel Integrator subunit [ChIP-seq I]
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE204932 | GEO | 2023/01/25
REPOSITORIES: GEO
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Project description:The Integrator complex is one of the most elusive transcriptional regulators in metazoans, deemed to be recruited after initiation to help establish and modulate paused RNAPII. Recent structural, biochemical, and functional evidence suggest that Integrator is composed of 14 subunits, assembling, and operating in a modular fashion. We employed proteomics and machine-learning (alphafold2) approaches to discover a novel Integrator subunit, INTS15. We report that INTS15 assembles primarily with the INTS10-INTS13-INTS14 module and interfaces with the Int-PP2A phosphatase module. Functional genomics analysis further reveals a role for INTS15 in modulating RNAPII pausing at a subset of genes in human cell lines.
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Project description:The Integrator complex is one of the most elusive transcriptional regulators in metazoans, deemed to be recruited after initiation to help establish and modulate paused RNAPII. Recent structural, biochemical, and functional evidence suggest that Integrator is composed of 14 subunits, assembling, and operating in a modular fashion. We employed proteomics and machine-learning (alphafold2) approaches to discover a novel Integrator subunit, INTS15. We report that INTS15 assembles primarily with the INTS10-INTS13-INTS14 module and interfaces with the Int-PP2A phosphatase module. Functional genomics analysis further reveals a role for INTS15 in modulating RNAPII pausing at a subset of genes in human cell lines.
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Project description:RNA Polymerase II (RNAPII) controls expression of all protein coding genes and most noncoding loci in higher eukaryotes. Calibrating RNAPII activity requires an assortment of polymerase-associated factors that are recruited at sites of active transcription. The Integrator complex is one of the most elusive transcriptional regulators in metazoans, deemed to be recruited after initiation to help establish and modulate paused RNAPII. Integrator is known to be composed of 14 subunits that assemble and operate in a modular fashion. We employed proteomics and machine-learning structure prediction (AlphaFold2) to identify an additional Integrator subunit, INTS15. We report that INTS15 assembles primarily with the INTS13/INTS14/INTS10 module and interfaces with the Int-PP2A module. Functional genomics analysis further reveals a role for INTS15 in modulating RNAPII pausing at a subset of genes. Our study shows that omics approaches combined with AlphaFold2-based predictions provide additional insights into the molecular architecture of large and dynamic multiprotein complexes.
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Project description:RNA polymerase II (RNAPII) controls the expression of all protein coding genes and most noncoding loci in higher eukaryotes. The ultimate rate of transcription is regulated at the level of multiple checkpoints during the transcription cycle (initiation, pausing, termination). Calibrating the activity of RNAPII is fundamental to all cellular processes and requires an assortment of polymerase-associated factors that are recruited at sites of active transcription. The Integrator complex is one of the most elusive transcriptional regulators in metazoans, deemed to be recruited after initiation to help establish and modulate paused RNAPII. Recent structural, biochemical, and functional evidence suggest that Integrator is composed of 14 subunits that assemble and operate in a modular fashion. We employed proteomics and machine-learning structure prediction (AlphaFold2) approaches to identify a novel Integrator subunit, INTS15. We report that INTS15 assembles primarily with the INTS13/INTS14/INTS10 module and interfaces with the core of the Int-PP2A complex. Functional genomics analysis further reveals a role for INTS15 in modulating RNAPII pausing at a subset of genes in human cell lines. Our study shows that omics approaches combined with AlphaFold2-based predictions provide novel insights into the molecular architecture of large and flexible multiprotein complexes.
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Project description:Cell fate specification occurs via coordinated transcriptional changes in pluripotent cells, resulting in progressive commitment towards distinct lineages. Lineage-specific transcription factors (TFs), through their intrinsic DNA-binding ability, operate as master orchestrators of early and late developmental processes by turning on select cis-regulatory enhancers and proximal promoter elements. TF binding ultimately drives recruitment of the basal transcriptional machinery that comprises RNA Polymerase II (RNAPII) and a host of polymerase-associated multiprotein complexes, including the metazoan-specific Integrator complex. Integrator is primarily known to modulate RNAPII processivity and to surveil RNA integrity. Here we show that a set of Integrator subunits (enhancer module) plays a direct role in cell fate specification by promoting epigenetic changes and TF binding at enhancer elements that drive neurogenesis and maintain neuronal cell identity. Depletion of a single Integrator subunit (INTS10) results in loss of molecular and morphological neuronal features, while diverting progenitor cells towards mesenchymal identity. Commissioning of developmental enhancers rely on Integrator’s enhancer module, which stabilizes SOX2 binding at chromatin upon exit from pluripotency. Integrator therefore operates as a functional bridge between enhancers and target promoters and is a driver of early developmental processes, providing new insight into a growing family of neurodevelopmental syndromes.
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Project description:Cell fate specification occurs via coordinated transcriptional changes in pluripotent cells, resulting in progressive commitment towards distinct lineages. Lineage-specific transcription factors (TFs), through their intrinsic DNA-binding ability, operate as master orchestrators of early and late developmental processes by turning on select cis-regulatory enhancers and proximal promoter elements. TF binding ultimately drives recruitment of the basal transcriptional machinery that comprises RNA Polymerase II (RNAPII) and a host of polymerase-associated multiprotein complexes, including the metazoan-specific Integrator complex. Integrator is primarily known to modulate RNAPII processivity and to surveil RNA integrity. Here we show that a set of Integrator subunits (enhancer module) plays a direct role in cell fate specification by promoting epigenetic changes and TF binding at enhancer elements that drive neurogenesis and maintain neuronal cell identity. Depletion of a single Integrator subunit (INTS10) results in loss of molecular and morphological neuronal features, while diverting progenitor cells towards mesenchymal identity. Commissioning of developmental enhancers rely on Integrator’s enhancer module, which stabilizes SOX2 binding at chromatin upon exit from pluripotency. Integrator therefore operates as a functional bridge between enhancers and target promoters and is a driver of early developmental processes, providing new insight into a growing family of neurodevelopmental syndromes.
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Project description:Cell fate specification occurs via coordinated transcriptional changes in pluripotent cells, resulting in progressive commitment towards distinct lineages. Lineage-specific transcription factors (TFs), through their intrinsic DNA-binding ability, operate as master orchestrators of early and late developmental processes by turning on select cis-regulatory enhancers and proximal promoter elements. TF binding ultimately drives recruitment of the basal transcriptional machinery that comprises RNA Polymerase II (RNAPII) and a host of polymerase-associated multiprotein complexes, including the metazoan-specific Integrator complex. Integrator is primarily known to modulate RNAPII processivity and to surveil RNA integrity. Here we show that a set of Integrator subunits (enhancer module) plays a direct role in cell fate specification by promoting epigenetic changes and TF binding at enhancer elements that drive neurogenesis and maintain neuronal cell identity. Depletion of a single Integrator subunit (INTS10) results in loss of molecular and morphological neuronal features, while diverting progenitor cells towards mesenchymal identity. Commissioning of developmental enhancers rely on Integrator’s enhancer module, which stabilizes SOX2 binding at chromatin upon exit from pluripotency. Integrator therefore operates as a functional bridge between enhancers and target promoters and is a driver of early developmental processes, providing new insight into a growing family of neurodevelopmental syndromes.
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