Binding Free Energy Calculation Using Variable Anchor Points
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Solution Overview
Problem
Current methods for calculating binding free energy between target molecules and drug candidate molecules suffer from reduced accuracy due to the presence of multiple stable structures when using distance restraint potentials, leading to localized binding free energy calculations that fail to account for the abundance ratio of these structures.
Innovation Solution
The method involves adding a distance restraint potential between a binding calculation target molecule and a target molecule, where anchor points of the binding calculation target molecule remain identical across steps, while anchor points of the target molecule change, allowing for improved calculation accuracy by selectively sampling stable structures using different anchor points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a distance restraint potential is added to limit structural space between target molecule and binding calculation target molecule, then the structural space is constrained, but calculation accuracy of binding free energy is lowered
Solution Approach 1:
The calculation process is segmented into multiple independent calculation steps, each using a different anchor point on the target molecule. This segmentation allows the system to explore multiple structural configurations separately and then integrate the results, avoiding the accuracy loss that occurs when a single restraint potential limits all structural space.
Solution Approach 2:
The invention transitions from a single-point restraint approach to a multi-point restraint approach by introducing multiple anchor points on the target molecule. This dimensional expansion from one anchor point to multiple anchor points allows comprehensive sampling of binding structures while maintaining calculation accuracy through proper weighting of each configuration.
2Adaptability or versatility
If multiple stable structures exist between target molecule and binding calculation target molecule, then structural diversity is increased, but binding free energy calculation becomes localized and less accurate
Solution Approach 1:
The invention performs preliminary sampling of multiple stable structures by conducting multiple calculation steps with different anchor points before final binding free energy determination. This preliminary exploration ensures all relevant structural configurations are identified and properly weighted, preventing localization errors in the final calculation.
Solution Approach 2:
The calculation method incorporates feedback mechanisms where results from each calculation step using different anchor points are integrated to determine the final binding free energy. This feedback loop ensures that structural diversity is properly accounted for and that the final result reflects the abundance ratio of different stable structures rather than being localized to a single configuration.
Data Source
AI summary
A method for calculating binding free energy, where the method includes a plurality of steps each including adding a distance restraint potential between a binding calculation target molecule and a target molecule, wherein the method is a method for calculating binding free energy between the binding calculation target molecule and the target molecule using a computer, and wherein anchor points of the binding calculation target molecule in the plurality of the steps are identical anchor points, and anchor points of the target molecule in the plurality of the steps are different anchor points.