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How to describe chirality and conformational flexibility.

Gordon M Crippen¹

¹College of Pharmacy, University of Michigan, Ann Arbor, Michigan, USA.

Methods in Molecular Biology (Clifton, N.J.)

|May 14, 2004

Summary

A new chirality function can quantify molecular chirality using atomic coordinates and properties. This continuous function distinguishes enantiomers and is zero for achiral molecules, aiding molecular modeling.

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Area of Science:

Computational Chemistry
Molecular Modeling
Structural Biology

Background:

Chirality is crucial in molecular recognition and biological activity.
Distinguishing enantiomers is essential in drug discovery and chemical synthesis.
Existing methods for quantifying chirality can be complex or discontinuous.

Purpose of the Study:

To develop a straightforward and continuous function for quantifying molecular chirality.
To provide a tool for molecular modeling and structure-activity relationship (SAR) studies.
To enable reliable differentiation between enantiomers and achiral molecules.

Main Methods:

Utilizing atomic coordinates of a molecule's conformation.
Assigning property values to individual atoms.
Calculating a continuous chirality function based on coordinates and properties.

Main Results:

The developed function successfully distinguishes between enantiomers.
The function yields zero for achiral molecules.
The chirality function is a continuous function of atomic coordinates and properties.

Conclusions:

The proposed chirality function offers a quantitative and continuous measure of molecular chirality.
This method is valuable for computational chemistry, molecular modeling, and SAR analysis.
It provides a robust tool for assessing and comparing enantiomeric forms of molecules.

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