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Related Concept Videos

Protein Networks02:26

Protein Networks

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Protein-protein Interfaces02:04

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Related Experiment Video

Updated: Nov 8, 2025

Studying RNA Interactors of Protein Kinase RNA-Activated during the Mammalian Cell Cycle
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Methods to study circRNA-protein interactions.

Corinna J Ulshöfer1, Christina Pfafenrot1, Albrecht Bindereif1

  • 1Institute of Biochemistry, Justus-Liebig-University of Giessen, 35392 Giessen, Germany.

Methods (San Diego, Calif.)
|April 24, 2021
PubMed
Summary
This summary is machine-generated.

Circular RNAs (circRNAs) interact with RNA-binding proteins (RBPs) to perform cellular functions. This review details methods for identifying these crucial circRNA-protein complexes (circRNPs).

Keywords:
Circular RNAs (circRNAs)RNA-binding proteins (RBPs)RNA-protein interactionsRibonucleoprotein complexes (RNPs)

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Area of Science:

  • Molecular Biology
  • Genomics
  • Biochemistry

Background:

  • Circular RNAs (circRNAs) are increasingly recognized for their functional significance across various biological contexts.
  • RNA-binding proteins (RBPs) are known to mediate some circRNA functions, but their specific interactions are often uncharacterized.
  • Identifying circRNA-protein interactions is challenging due to technical limitations and the need to distinguish them from interactions with linear RNA isoforms.

Purpose of the Study:

  • To review and discuss current methodologies for systematically identifying circRNA-protein complexes (circRNPs).
  • To highlight the advantages and challenges associated with different approaches for studying circRNA interactomes.

Main Methods:

  • The review covers techniques for studying circRNA-protein interactions at both gene-specific and global levels.
  • Approaches focusing on either a specific circRNA or a specific RBP are discussed.
  • Methods for differentiating circRNA interactors from those of linear RNA counterparts are examined.

Main Results:

  • A range of methodologies exist for the systematic identification of circRNPs.
  • Each method presents unique advantages and inherent challenges regarding specificity, sensitivity, and scale.
  • The field currently lacks a universally adopted gold standard for circRNP identification.

Conclusions:

  • Systematic identification of circRNA-protein interactions is crucial for understanding circRNA functions.
  • Careful consideration of methodological strengths and weaknesses is necessary for robust circRNP discovery.
  • Further development of techniques is needed to overcome existing challenges in the field.