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Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

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Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
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HIV-1 Envelope Conformation, Allostery, and Dynamics.

Ashley Lauren Bennett1, Rory Henderson1,2

  • 1Duke Human Vaccine Institute, Durham, NC 27710, USA.

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Understanding the HIV-1 envelope glycoprotein (Env) conformational changes is crucial for designing effective vaccines. This review details experimental and computational studies mapping Env

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HIV-1allosteryenvelopemolecular dynamicsstructure

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Area of Science:

  • Structural biology
  • Virology
  • Immunology

Background:

  • The HIV-1 envelope glycoprotein (Env) is essential for viral entry and a key target for vaccine development.
  • Env undergoes significant conformational changes upon binding to the host cell receptor CD4.
  • These conformational transitions are critical for viral fusion and are targeted by broadly neutralizing antibodies.

Purpose of the Study:

  • To review experimental data on HIV-1 Env conformations.
  • To detail computational approaches for understanding Env conformational rearrangements.
  • To provide a structural map of Env states and transitions for improved vaccine design.

Main Methods:

  • Review of existing experimental data on HIV-1 Env structure and dynamics.
  • Computational modeling to delineate conformational changes.
  • Analysis of allosteric elements governing Env rearrangements.

Main Results:

  • Structural mapping of prefusion closed, open, and intermediate Env conformations.
  • Identification of allosteric mechanisms controlling Env rearrangements.
  • Characterization of state-to-state transition dynamics.

Conclusions:

  • Integrated experimental and computational studies provide a detailed understanding of HIV-1 Env conformational landscape.
  • This knowledge is vital for designing immunogens that elicit broadly neutralizing antibodies.
  • Advances in molecular modeling enable higher resolution studies of Env dynamics.