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Unveiling Allosteric Regulation and Binding Mechanism of BRD9 through Molecular Dynamics Simulations and Markov

Bin Wang1, Jian Wang2, Wanchun Yang2

  • 1Center for Medical Artificial Intelligence, Shandong University of Traditional Chinese Medicine, Qingdao 266112, China.

Molecules (Basel, Switzerland)
|August 10, 2024
PubMed

Insights

Bromodomain-containing protein 9 (BRD9) inhibitors, POJ and 82I, alter protein structure and binding. This study offers insights into BRD9 inhibition for cancer treatment strategies.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Computational Chemistry

Background:

  • Bromodomain-containing protein 9 (BRD9) is implicated in chromatin remodeling, gene regulation, and cancer development.
  • BRD9 inhibition shows promise for targeted cancer therapies.

Purpose of the Study:

  • Investigate the binding mechanisms of allosteric inhibitor POJ and orthosteric inhibitor 82I to BRD9.
  • Elucidate the allosteric regulation of BRD9 by these inhibitors.
  • Provide a theoretical basis for developing BRD9-targeted cancer treatments.

Main Methods:

  • Molecular dynamics (MD) simulations.
  • Markov modeling and principal component analysis.
  • Binding free energy calculations and Markov flux analysis.

Main Results:

  • Inhibitor binding induces significant structural changes in BRD9, including alterations in α-helical regions.
  • Markov flux analysis identified changes in α-helicity near the ZA loop upon inhibitor binding.
  • Cooperative binding of orthosteric and allosteric inhibitors modulates BRD9's binding ability and active site characteristics.

Conclusions:

  • The study provides novel insights into the inhibitory mechanisms of POJ and 82I on BRD9.
  • Findings support the development of dual-targeting strategies for enhanced cancer therapy.
  • This research lays a theoretical foundation for future drug development targeting BRD9.
Keywords:
BRD9Markov modelsbinding free energymolecular dynamics simulations

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