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Related Concept Videos

Labeling DNA Probes03:31

Labeling DNA Probes

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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
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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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Related Experiment Video

Updated: Oct 3, 2025

In Vitro Biochemical Assays using Biotin Labels to Study Protein-Nucleic Acid Interactions
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In Vitro Biochemical Assays using Biotin Labels to Study Protein-Nucleic Acid Interactions

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Studying the ubiquitin code through biotin-based labelling methods.

Orhi Barroso-Gomila1, Veronica Muratore1, Laura Merino-Cacho1

  • 1Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 801A, 48160 Derio, Spain.

Seminars in Cell & Developmental Biology
|February 19, 2022
PubMed
Summary
This summary is machine-generated.

Biotin-based methods help study ubiquitin modifications, crucial for cell regulation. These techniques identify protein substrates and enzymes, aiding research into diseases linked to errors in the "ubiquitin code".

Keywords:
BiotinBirAProximity proteomicsSUMOUbiquitin

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Area of Science:

  • Biochemistry and Molecular Biology
  • Cellular Biology
  • Proteomics

Background:

  • Post-translational modifications by ubiquitin (Ub) and ubiquitin-like (UbL) proteins regulate protein homeostasis.
  • The
  • ubiquitin code
  • describes how UbL modifications dictate substrate fate.
  • Dysregulation of this code is implicated in diseases like cancer and neurodegeneration.

Purpose of the Study:

  • To review current biotin-based methods for studying UbL modifications.
  • To highlight the advantages and disadvantages of site-specific and proximity biotinylation.
  • To discuss the potential of these methods in identifying novel substrates and therapeutic targets.

Main Methods:

  • Site-specific biotinylation: precisely labels modified proteins.
  • Proximity-dependent biotinylation: captures modified proteins and their interactors.
  • Biotin-based enrichment: facilitates isolation and identification of UbL-modified substrates and associated factors.

Main Results:

  • Biotinylation techniques enable the identification of UbL substrates, modification sites, and enzymes.
  • These methods overcome challenges of transient, scarce, and compartment-specific modifications.
  • Advances are expanding the understanding of the ubiquitin code and its role in disease.

Conclusions:

  • Biotin-based technology is a powerful tool for dissecting the ubiquitin code.
  • It facilitates the discovery of new substrates and regulators of UbL modifications.
  • This research holds promise for developing novel therapeutic strategies targeting the ubiquitin system.