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Related Concept Videos

Regulation of the Unfolded Protein Response01:31

Regulation of the Unfolded Protein Response

Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...

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Structural methods for studying IRES function.

Jeffrey S Kieft1, David A Costantino, Megan E Filbin

  • 1Department of Biochemistry and Molecular Genetics, University of Colorado at Denver, USA.

Methods in Enzymology
|October 5, 2007
PubMed
Summary
This summary is machine-generated.

Understanding internal ribosome entry sites (IRESs) requires detailed structural analysis. This study provides a roadmap for characterizing IRES RNA structure, aiding functional studies.

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Area of Science:

  • Molecular Biology
  • Structural Biology
  • Biochemistry

Background:

  • Internal ribosome entry sites (IRESs) are RNA elements that facilitate cap-independent translation initiation.
  • Understanding the three-dimensional structure of IRES RNAs is crucial for elucidating their mechanism of action.
  • Existing knowledge gaps hinder a comprehensive understanding of IRES RNA folding, architecture, and function.

Purpose of the Study:

  • To present a comprehensive roadmap for the structural characterization of folded RNAs, with a focus on IRES RNAs.
  • To guide researchers in determining IRES RNA architecture from global folding to high-resolution details.
  • To provide a framework for interpreting structural data in the context of IRES RNA function.

Main Methods:

  • Solution hydroxyl radical probing
  • RNase T1 probing
  • Native gel electrophoresis
  • Sedimentation velocity analytical ultracentrifugation
  • RNA engineering for crystallization

Main Results:

  • The chapter outlines a systematic approach to IRES RNA structural characterization.
  • It details experimental protocols adaptable for various RNA structures.
  • Strategies for interpreting structural data to understand IRES function are discussed.

Conclusions:

  • A detailed structural understanding of IRES RNAs is essential for deciphering their translation initiation mechanism.
  • The presented roadmap and protocols offer a valuable resource for researchers studying RNA structure and function.
  • This approach is broadly applicable to the structural characterization of diverse RNA molecules.