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Related Experiment Videos

Far-red fluorescent tag for protein labelling.

Arkady F Fradkov1, Vladislav V Verkhusha, Dmitry B Staroverov

  • 1Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry RAS, Miklukho-Maklaya 16/10, Moscow 117997, Russia.

The Biochemical Journal
|September 28, 2002
PubMed
Summary
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Researchers developed a novel tandem fluorescent protein tag using linked red fluorescent proteins (FPs) to overcome limitations of oligomeric Anthozoa FPs. This non-oligomerizing tag improves in vivo labeling of cellular structures and enables FRET applications.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Fluorescent proteins (FPs) from Anthozoa are valuable biological tools but their oligomeric nature restricts applications.
  • Developing non-oligomerizing FP tags is crucial for advanced in vivo imaging and assays.

Purpose of the Study:

  • To engineer a non-oligomerizing tandem FP tag to overcome the limitations of oligomeric Anthozoa FPs.
  • To demonstrate the utility of the novel tag for in vivo labeling and Förster Resonance Energy Transfer (FRET) applications.

Main Methods:

  • Covalently linking two identical red fluorescent proteins (HcRed1) to create a tandem tag.
  • In vivo labeling of fine cytoskeletal structures and nucleoli using the tandem tag.
  • Demonstrating FRET between enhanced yellow FP mutant (EYFP) and the tandem HcRed1 in a protease assay.

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Main Results:

  • The tandem HcRed1 tag exhibited superior performance in labeling fine cellular structures compared to monomeric FPs.
  • Effective FRET was observed between EYFP and the tandem HcRed1, indicating its suitability for FRET-based assays.
  • The engineered tag successfully overcomes the oligomerization issues inherent in many Anthozoa FPs.

Conclusions:

  • The tandem FP tag strategy provides a robust solution for overcoming oligomerization limitations of Anthozoa FPs.
  • This novel tag enhances in vivo imaging capabilities and opens new avenues for FRET-based biosensing.
  • The engineered tag represents a significant advancement for fluorescent protein applications in cell biology and biochemistry.