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Updated: May 21, 2025
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Monitoring the Assembly of a Secreted Bacterial Virulence Factor Using Site-specific Crosslinking
Published on: December 17, 2013
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Rab11 Binding Promotes the p14 FAST Protein-Induced Syncytium Formation
Shuru Lin1,2, Zhengfei Qi3,4,2, Quanxiang Yu2
1College of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
ACS Omega
|May 19, 2025
Summary
Reptile reoviruses
Area of Science:
- Virology
- Cell Biology
- Molecular Biology
Background:
- Reptile reoviruses utilize the p14 fusion-associated small transmembrane (FAST) protein for cell-cell membrane fusion.
- The p14 protein is synthesized and trafficked to the plasma membrane via the endoplasmic reticulum-Golgi pathway.
- A polybasic motif (PBM) in the p14 cytosolic endodomain interacts with Rab11 on the Golgi.
Purpose of the Study:
- To investigate the interaction between the p14 FAST protein and Rab11.
- To elucidate the role of Rab11 in p14-mediated membrane fusion.
- To explore the potential of p14 as a fusion peptide.
Main Methods:
- Surface plasmon resonance (SPR) was employed to assess the binding affinity between p141-69 and Rab11.
- Cellular assays were conducted to evaluate the impact of Rab11 on p14-induced syncytium formation and membrane fusion efficiency.
- Preliminary experiments explored p141-69's ability to induce liposome-cell fusion.
Main Results:
- SPR confirmed a significant binding affinity between p141-69 and Rab11.
- Rab11 was demonstrated to directly enhance p14-induced syncytium formation and improve membrane fusion efficiency at the cellular level.
- Preliminary data suggests p141-69 can function as a fusion peptide, triggering liposome-cell fusion.
Conclusions:
- Rab11 plays a direct and crucial role in facilitating p14 FAST protein-mediated membrane fusion.
- The interaction between p14 and Rab11 is essential for efficient viral entry and cell-cell fusion.
- p141-69 shows potential as a fusion peptide for applications in membrane fusion studies.
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