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Published on: May 13, 2019
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Take a break: Transcription regulation and RNA processing by the Integrator complex.
Kevin Sabath1, Stefanie Jonas1
1Institute of Molecular Biology and Biophysics, Department of Biology, ETH Zurich, Switzerland.
Current Opinion in Structural Biology
|September 11, 2022
Summary
The Integrator complex, a large molecular machine, regulates gene transcription by interacting with RNA polymerase II (RNAP2). It controls gene expression essential for cell functions and responds to stimuli.
Area of Science:
- Molecular Biology
- Gene Regulation
- Biochemistry
Background:
- The Integrator complex is a large metazoan machinery crucial for regulating transcription.
- It interacts with RNA polymerase II (RNAP2) to control gene expression.
- Integrator plays roles in both coding gene attenuation and non-coding RNA processing.
Purpose of the Study:
- To elucidate the mechanisms by which the Integrator complex regulates transcription.
- To understand the interaction between Integrator and RNAP2.
- To explore the regulation of Integrator's cleavage activity.
Main Methods:
- Structural biology studies of Integrator bound to RNAP2.
- Biochemical assays to investigate Integrator's function and regulation.
- Analysis of Integrator's interaction with RNAP2 and its paused state.
Main Results:
- Integrator attenuates coding gene transcription via early termination and processes non-coding RNAs.
- The complex incorporates phosphatase PP2A to counteract transcription-promoting phosphorylation.
- Structural data reveals Integrator's recruitment to paused RNAP2 at promoter-proximal regions.
- Integrator's cleavage activity is subject to multi-level regulation.
Conclusions:
- The Integrator complex is a key regulator of transcription with essential roles in cell differentiation and response.
- Understanding Integrator-RNAP2 interactions and its regulatory mechanisms provides insights into gene expression control.
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