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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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Covalently Linked Protein Regulators02:04

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Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

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For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
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Related Experiment Video

Updated: Mar 13, 2026

In Situ Detection of Ribonucleoprotein Complex Assembly in the C. elegans Germline using Proximity Ligation Assay
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A gene-centered C. elegans protein-DNA interaction network provides a framework for functional predictions.

Juan I Fuxman Bass1, Carles Pons2, Lucie Kozlowski1

  • 1Program in Systems Biology and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA.

Molecular Systems Biology
|October 26, 2016
PubMed
Summary

Researchers mapped the largest protein-DNA interaction network in C. elegans, identifying new transcription factor (TF) binding sites and predicting gene functions to advance gene regulation understanding.

Keywords:
C. elegansgene regulationprotein–DNA interaction networktranscription factorsyeast one‐hybrid assays

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Area of Science:

  • Genomics
  • Molecular Biology
  • Systems Biology

Background:

  • Transcription factors (TFs) are crucial for controlling gene expression and cellular responses.
  • Understanding gene regulation requires integrating physical protein-DNA interactions (PDIs) with functional data.
  • Current PDI mapping methods have only characterized a small fraction of TFs in metazoans.

Purpose of the Study:

  • To construct the largest gene-centered metazoan PDI network to date.
  • To predict novel TF binding sites and elucidate TF/gene regulatory functions.
  • To integrate diverse biological data for a comprehensive view of gene regulation.

Main Methods:

  • Examined interactions between 90% of C. elegans TFs and 15% of gene promoters.
  • Utilized the PDI network to predict TF binding sites for 77 TFs.
  • Integrated gene expression, protein-protein interaction, and phenotypic data.

Main Results:

  • Delineated the largest gene-centered metazoan PDI network.
  • Predicted TF binding sites for 77 TFs, with two-thirds being novel discoveries.
  • Integrated data to predict regulatory and biological functions for numerous genes and TFs.

Conclusions:

  • The study provides a comprehensive PDI network and functional predictions for C. elegans TFs.
  • This resource advances the understanding of gene regulation by integrating physical interactions with functional data.
  • The approach offers a scalable model for dissecting gene regulatory networks in other metazoan species.