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Human immunodeficiency virus 1 (HIV-1) reverse transcriptase (RT) maturation involves complex conformational changes and dimerization. Understanding these steps, including domain rearrangement and proteolysis, offers potential drug targets for HIV-1 therapy.

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Area of Science:

  • Structural biology
  • Virology
  • Biochemistry

Background:

  • HIV-1 reverse transcriptase (RT) is essential for viral replication.
  • RT maturation involves parallel pathways for p66 precursor proteins.
  • The metamorphic polymerase domain's structural ambiguity is key to these pathways.

Approach:

  • Review of recent nuclear magnetic resonance (NMR) studies.
  • Structural characterization of the p66 monomer precursor.
  • Analysis of major structural changes during maturation.

Key Points:

  • Maturation involves domain rearrangement, dimerization, and subunit-selective ribonuclease H (RH) domain proteolysis.
  • Mutations impact RT maturation and dimerization.
  • The sequence-structure relationship is not unique for the polymerase domain.

Conclusions:

  • HIV-1 RT maturation pathways are complex and rely on structural ambiguity.
  • Understanding maturation provides insights into enzyme function and potential drug targets.
  • Targeting RT maturation steps could lead to novel antiviral therapies.