TRIM5α Proteins Can Move Between the Nucleus and Cytoplasm
Author Information
Author(s): Felipe Diaz-Griffero, Daniel E. Gallo, Thomas J. Hope, Joseph Sodroski
Primary Institution: Albert Einstein College of Medicine
Hypothesis
Do TRIM5α proteins traffic to the nucleus and how does this affect retroviral restriction?
Conclusion
TRIM5α proteins from humans and rhesus monkeys can shuttle between the nucleus and cytoplasm, which may be important for functions beyond retroviral restriction.
Supporting Evidence
- TRIM5α proteins from humans and rhesus monkeys were found to accumulate in the nucleus after treatment with leptomycin B.
- Deletion of specific regions in TRIM5α affected its localization and export from the nucleus.
- Despite nuclear accumulation, TRIM5α proteins maintained their ability to restrict retroviral infection.
Takeaway
Some proteins called TRIM5α can go in and out of the nucleus of cells, which might help them do their job better.
Methodology
The study involved treating cells with leptomycin B to observe the localization of TRIM5α proteins and their ability to shuttle between the nucleus and cytoplasm.
Limitations
The study primarily used exogenously expressed TRIM5α proteins, which may not fully represent the behavior of endogenous proteins.
Digital Object Identifier (DOI)
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