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Cooperative Allosteric Transitions01:58

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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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Long-Range Changes in Neurolysin Dynamics Upon Inhibitor Binding.

A Uyar1, V T Karamyan2, A Dickson1,3

  • 1Department of Biochemistry and Molecular Biology, Michigan State University , East Lansing, Michigan 48824, United States.

Journal of Chemical Theory and Computation
|November 29, 2017
PubMed
Summary
This summary is machine-generated.

Neurolysin inhibitor binding induces subtle structural changes but significant long-range allosteric effects, influencing protein dynamics and communication pathways. This finding aids in designing better neurolysin-targeted therapies.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Computational Biology

Background:

  • Neurolysin, a zinc metallopeptidase, regulates neuropeptide levels, with implications for cardiovascular disorders, neurological disorders, and cancer.
  • Allosteric inhibitors of neurolysin are being developed as potential therapeutics.
  • Understanding neurolysin's dynamics and structural changes upon inhibitor binding is crucial for drug design.

Purpose of the Study:

  • To investigate the dynamical and structural differences between apo and inhibitor-bound neurolysin.
  • To identify allosteric effects and long-range communication pathways modulated by inhibitor binding.
  • To provide insights for designing potent neurolysin inhibitors and activators.

Main Methods:

  • Molecular dynamics (MD) simulations of apo and inhibitor-bound neurolysin.
  • Machine learning (Linear Discriminant Analysis) for ensemble analysis.
  • Principal Component Analysis (PCA) and Elastic Network Model (ENM) calculations for motion and communication analysis.

Main Results:

  • Inhibitor binding induces additional low-frequency motions not present in the apo form.
  • Significant differences were observed in residues far from the active and inhibitor binding sites.
  • ENM revealed altered inter- and intradomain communication and changes in the contact network, indicating long-range allosteric behavior.

Conclusions:

  • Neurolysin inhibitor binding triggers long-range allosteric effects beyond the active site.
  • MD simulations and ENM analysis reveal significant alterations in protein dynamics and communication.
  • Findings offer valuable insights for the rational design of allosteric modulators for neurolysin and related enzymes.