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Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies
Published on: March 6, 2013
Electron microscopic studies of the translin octameric ring
1Department of Biochemistry and Molecular Genetics, University of Virginia Health Sciences, Box 800733, Virginia, Charlottesville 22908-0733, USA.
Journal of Structural Biology
|September 20, 2001
Summary
Translin, a protein involved in DNA and RNA processes, forms an octameric ring. Electron microscopy reveals its structure, suggesting similar organizations in DNA/RNA metabolism proteins.
Area of Science:
- Molecular Biology
- Structural Biology
- Biochemistry
Background:
- Translin is implicated in cellular processes like chromosomal translocations and mRNA regulation.
- It forms an octameric ring with DNA/RNA binding capabilities.
Purpose of the Study:
- To determine the three-dimensional structure of the Translin ring.
- To understand its interaction with DNA and RNA substrates.
Main Methods:
- Electron microscopy
- Single-particle image analysis
- Three-dimensional reconstruction
Main Results:
- A 3D reconstruction of the Translin octameric ring was generated.
- The ring structure features an open channel with varying diameters.
- Density fills the central cavity upon binding DNA or RNA with consensus sequences.
- Translin's quaternary organization resembles hexameric ring helicases.
Conclusions:
- Translin possesses a unique ring structure with DNA/RNA binding capabilities.
- The structural similarity to ring helicases suggests conserved quaternary organization in DNA/RNA metabolism.
- This finding provides insights into the structural basis of Translin's cellular functions.
