RESEARCH: HALOGENASE-BIOCATALYSIS
FOLDING PROJECT #19230 PROFILE

Many medicines use halogens (like chlorine or bromine). Adding these can be tricky and sometimes makes toxic waste. Scientists are studying special enzymes called halogenases to make this process safer and more precise. This project uses computer models to predict how well different enzymes work on common molecules, helping us design better medicines.

Note: This TLDR is a simplication and may not be 100% accurate.

Approximately 40 percent of drugs approved or currently in clinical testing contain halogens (F, Cl, Br, or I) as pharmaceutically active ligand substituents.

This makes the halogenation of chemical scaffolds an issue of particular interest to medicinal chemists when attempting to synthesize potential drug candidates.

Many of the current methods for halogenation are difficult to control the regioselectivity or produce toxic byproducts during the reaction.

Due to these issues; halogenases, a class of enzymes that catalyze highly regioselective halogenation of various molecules in nature, have been studied as a means to improve existing halogenation methods with less toxic byproducts and higher regioselectivity of reaction.

By utilizing Relative Binding Free Energy calculations (RBFE) across a number of common organic molecule scaffolds, our goal is to better predict the probability and site of halogenation for various common chemical scaffolds across a number of halogenases.

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halogens

Elements fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).

Halogens are elements found in Group 17 of the periodic table. They include fluorine, chlorine, bromine, and iodine. In pharmaceuticals, halogens are often used as substituents on drug molecules because they can influence a drug's properties, such as its ability to bind to target proteins.

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ligand

A molecule that binds to a protein or other biomolecule.

In pharmacology, a ligand is any molecule that can bind to a specific receptor site on a protein. This binding interaction can trigger a variety of cellular responses. Ligands are essential for many biological processes, including signal transduction and enzymatic activity.

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pharmaceutically active

Producing a desired therapeutic effect.

A drug is considered pharmaceutically active when it produces a desired biological or therapeutic effect in the body. This effect can be anything from pain relief to lowering blood pressure.

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regioselectivity

The preferential formation of one isomer over others.

Regioselectivity is a key concept in organic chemistry that describes the tendency of a chemical reaction to preferentially form one isomer (structural variant) over others. In drug synthesis, regioselectivity is crucial for producing the desired active compound.

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byproducts

Substances formed as a result of a chemical reaction.

Byproducts are additional substances that are produced during a chemical reaction. They are often unwanted and need to be removed from the desired product.

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halogenases

Enzymes that catalyze halogenation reactions.

Halogenases are a class of enzymes that play a vital role in the biosynthesis of natural products. They catalyze the addition of halogens (fluorine, chlorine, bromine, or iodine) to organic molecules. These enzymes have gained significant interest in pharmaceutical research due to their potential for developing more sustainable and efficient methods for halogenation.

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Relative Binding Free Energy calculations (RBFE)

A computational method for predicting the binding affinity of a molecule to a target.

RBFE calculations are used in drug discovery and development to estimate how strongly a potential drug molecule binds to its target protein. This information is crucial for selecting promising drug candidates for further testing.