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Adaptive lambda schemes for efficient relative binding free energy calculation.

Jin Zeng1, Yue Qian2

  • 1AIxplorerBio Biotech Co., Ltd., Jiaxing, Zhejiang Province, China.

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|December 28, 2023
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Summary
This summary is machine-generated.

An automated adaptive lambda method improves relative free energy perturbation (RFEP) calculations for predicting small molecule binding affinity. This approach enhances accuracy and reproducibility in computational chemistry for drug discovery.

Keywords:
adaptivelambda schemerelative free energy perturbation

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Area of Science:

  • Computational Chemistry
  • Molecular Modeling
  • Drug Discovery

Background:

  • Relative Free Energy Perturbation (RFEP) is a theoretically sound method for predicting binding affinity.
  • RFEP calculations are complex, requiring specialized expertise and careful selection of parameters.
  • Inappropriate lambda schemes can lead to inaccurate binding affinity predictions.

Purpose of the Study:

  • To develop an automated adaptive lambda method to simplify and improve RFEP calculations.
  • To enhance the accuracy, consistency, and reproducibility of binding free energy predictions.
  • To provide a more robust tool for routine RFEP calculations in drug discovery.

Main Methods:

  • An automated adaptive lambda method was developed using a split-and-merge algorithm based on pilot runs.
  • Improvements were made to perturbation settings within the RFEP workflow.
  • The new method was compared against traditional pilot lambda schemes.

Main Results:

  • The adaptive lambda method demonstrated improved convergence and reproducibility compared to pilot schemes.
  • The adaptive method resulted in lower mean unsigned error and root-mean-square error.
  • The new workflow increased the consistency of RFEP calculation results.

Conclusions:

  • The automated adaptive lambda method offers a reliable and robust approach for predicting small molecule relative binding free energy.
  • This method addresses the complexity and expertise barriers associated with traditional RFEP calculations.
  • The adaptive lambda method can be effectively utilized to benefit routine RFEP calculations in drug discovery projects.