HIV-1 Variant Evolves to Escape T20 Dependence
Author Information
Author(s): Chris E. Baldwin, Ben Berkhout
Primary Institution: Academic Medical Center of the University of Amsterdam
Hypothesis
Can a T20-dependent HIV-1 variant evolve to become T20-independent through compensatory mutations?
Conclusion
The study found that a single amino acid change in the HIV-1 envelope protein can restore viral replication without the need for the T20 fusion inhibitor.
Supporting Evidence
- Escape variants with improved replication capacity appeared within 42 days in 5 evolution cultures.
- Three cultures revealed the same single amino acid change in the CD4 binding region of Env.
- The G431R mutation was sufficient to abolish the T20-dependence phenotype and restore viral replication.
Takeaway
Scientists studied a virus that usually needs a special medicine to enter cells. They found that a small change in the virus helped it enter cells without the medicine.
Methodology
The researchers performed forced evolution experiments with a T20-dependent HIV-1 variant in the absence of T20 to identify compensatory mutations.
Limitations
The study focused on a specific variant and may not represent all HIV-1 variants.
Digital Object Identifier (DOI)
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