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Calculating Standard Free Energy Changes02:49

Calculating Standard Free Energy Changes

The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
Free Energy01:21

Free Energy

Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a reaction to do work. It is the energy in a chemical reaction that is available after entropy is accounted for. Reactions that take in energy are considered endergonic and reactions that release energy are exergonic. Plants carry out endergonic reactions by taking in sunlight and carbon dioxide to produce glucose and oxygen. Animals, in turn, break down the...
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One of the challenges of using the second law of thermodynamics to determine if a process is spontaneous is that it requires measurements of the entropy change for the system and the entropy change for the surroundings. An alternative approach involving a new thermodynamic property defined in terms of system properties only was introduced in the late nineteenth century by American mathematician Josiah Willard Gibbs. This new property is called the Gibbs free energy (G) (or simply the free...
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Rapid in-silico Battery Electrolyte Electrochemical Reaction Generation using 3T-VASP Multi-Scale Energy Minimization
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Lead optimization mapper: automating free energy calculations for lead optimization.

Shuai Liu1, Yujie Wu, Teng Lin

  • 1Department of Pharmaceutical Sciences and Department of Chemistry, University of California, Irvine, 147 Bison Modular, Irvine, CA, 92697, USA.

Journal of Computer-Aided Molecular Design
|September 28, 2013
PubMed
Summary
This summary is machine-generated.

Lead Optimization Mapper (LOMAP) automates planning for alchemical free energy calculations in drug discovery. This algorithm efficiently maps relative free energy calculations for large ligand libraries, improving accuracy and reliability.

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Area of Science:

  • Computational chemistry
  • Drug discovery and development
  • Molecular modeling

Background:

  • Alchemical free energy calculations are valuable for drug discovery but challenging to implement.
  • Planning and executing these calculations for large compound libraries is a significant bottleneck.

Purpose of the Study:

  • To introduce Lead Optimization Mapper (LOMAP), an automated algorithm for planning relative free energy calculations.
  • To facilitate efficient and reliable free energy calculations for substantial ligand libraries in drug discovery.

Main Methods:

  • Ligands are grouped by structural similarity using maximal common substructure.
  • Calculations are planned within and between these structurally related groups.
  • Emphasis on minimizing calculation chains and incorporating redundancy for error checking.

Main Results:

  • LOMAP provides an automated approach to plan complex free energy calculations.
  • The method ensures direct or short-chained relative free energy results between compounds.
  • Redundancy in planning allows for error checking and reliability assessment.

Conclusions:

  • LOMAP streamlines the application of alchemical free energy calculations in drug discovery.
  • The algorithm enhances the efficiency, accuracy, and reliability of computational drug design.
  • A Python implementation is freely available, promoting wider adoption.