How HIV Uses a Cellular Enzyme to Activate Its Transcription
Author Information
Author(s): Sakane Naoki, Kwon Hye-Sook, Pagans Sara, Kaehlcke Katrin, Mizusawa Yasuhiro, Kamada Masafumi, Lassen Kara G., Chan Jonathan, Greene Warner C., Schnoelzer Martina, Ott Melanie
Primary Institution: Gladstone Institute of Virology and Immunology, University of California, San Francisco
Hypothesis
Does the viral Tat protein require a demethylation step mediated by LSD1 for HIV transcription activation?
Conclusion
The study identifies LSD1 as a key demethylase that activates HIV transcription by modifying the Tat protein.
Supporting Evidence
- LSD1 is identified as a K51-specific demethylase for the HIV Tat protein.
- Inhibition of LSD1 activity suppresses HIV transcription in latently infected T cells.
- Mass spectrometry did not detect bimodified Tat, indicating a sequential modification process.
- Phenelzine, an LSD1 inhibitor, effectively suppresses HIV reactivation from latency.
Takeaway
HIV needs a special helper called LSD1 to turn on its genes, and blocking this helper could keep the virus quiet.
Methodology
The researchers used mass spectrometry and immunoprecipitation to study the modifications of the Tat protein and its interaction with LSD1.
Limitations
The study did not detect bimodified Tat in cells, which may limit the understanding of Tat modification dynamics.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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