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Related Concept Videos

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Riboswitches

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Related Experiment Video

Updated: Mar 28, 2026

Protein Membrane Overlay Assay: A Protocol to Test Interaction Between Soluble and Insoluble Proteins in vitro
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Tobacco Rattle Virus Coat Protein Targets Ferredoxin 1 for Degradation.

Shaorui Tian1, Changyun Liu1, Jie Dong1

  • 1Chongqing Key Laboratory of Plant Disease Biology, College of Plant Protection, Southwest University, Chongqing, China.

Molecular Plant Pathology
|March 27, 2026
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Summary

Tobacco rattle virus coat protein targets ferredoxin (Fd1) in chloroplasts, causing photosynthesis inhibition and leaf chlorosis. This conserved mechanism highlights an ancient interaction crucial for plant defense and viral infection.

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Area of Science:

  • Plant pathology
  • Molecular biology
  • Evolutionary biology

Background:

  • Plant virus infections often cause chlorosis by inhibiting photosynthesis.
  • The conserved mechanisms underlying this phenomenon are not fully understood.

Purpose of the Study:

  • To investigate the mechanism by which tobacco rattle virus (TRV) coat protein (CP) inhibits photosynthesis.
  • To explore the evolutionary origins and significance of this interaction.

Main Methods:

  • Co-immunoprecipitation assays to detect protein interactions.
  • Proteasome activity assays to assess protein degradation.
  • Photosynthesis measurements to quantify photosynthetic rates.
  • Evolutionary analyses to trace the origin of ferredoxin (Fd1).

Main Results:

  • TRV CP interacts with Nicotiana benthamiana ferredoxin 1 (NbFd1) in chloroplasts, leading to NbFd1 degradation via the 26S proteasome.
  • NbFd1 degradation reduces net photosynthetic rates, causing leaf chlorosis.
  • Other viral proteins also recognize Fd1, indicating a conserved interaction.
  • Fd1 has ancient origins from photosynthetic bacteria, maintained through endosymbiosis.
  • TRV CP interacts with Fd1 from early-diverging plants, suggesting an ancient interaction.

Conclusions:

  • TRV CP targets Fd1 to impair host photosynthesis and promote disease symptoms.
  • The Fd1-TRV CP interaction has ancient evolutionary roots and plays a role in plant defense.
  • Understanding this interaction offers insights into plant-virus dynamics and evolution.