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INTS10-INTS13-INTS14 form a functional module of Integrator that binds nucleic acids and the cleavage module.

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A newly identified module, INTS10-INTS13-INTS14, binds nucleic acids and influences gene transcription termination. This module interacts with the Integrator complex, impacting snRNA processing and gene regulation.

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Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Structural Biology

Background:

  • The Integrator complex is crucial for processing snRNAs and regulating transcription termination.
  • The precise molecular mechanisms underlying Integrator's functions are not well understood.

Purpose of the Study:

  • To elucidate the molecular basis of Integrator complex functions.
  • To characterize a separable functional module within the Integrator complex.

Main Methods:

  • Structural analysis of the INTS13-INTS14 complex.
  • Biochemical assays to determine nucleic acid binding preferences.
  • Investigating the role of the INTS10-INTS13-INTS14 module in snRNA processing and transcription termination.

Main Results:

  • Identified INTS10, Asunder/INTS13, and INTS14 as a distinct functional module.
  • Determined the structure of INTS13-INTS14, revealing a unique interlinked complex with homology to DNA repair complexes.
  • The module exhibits affinity for nucleic acids, particularly RNA hairpins.
  • This module plays an accessory role in snRNA maturation but significantly influences transcription termination.
  • Asunder/INTS13 directly binds the Integrator cleavage module via a conserved motif.

Conclusions:

  • The INTS10-INTS13-INTS14 module is a nucleic acid-binding entity.
  • This module likely facilitates the interaction between the Integrator cleavage machinery and its target transcripts.
  • The findings provide insights into the regulation of gene expression and RNA processing.