Researchers discover molecular light switch in photoreceptor cells

How our eyes detect and respond to changes in light intensity is determined by specialized cells in the eye called photoreceptors. In addition to converting light into electrical signals, effectively allowing us to see, rod-shaped ...

Quantum light improves sensitivity of biological measurements

In a new study, researchers showed that quantum light can be used to track enzyme reactions in real time. The work brings together quantum physics and biology in an important step toward the development of quantum sensors ...

Researchers take two steps toward green fuel

An international collaboration led by scientists at Tokyo University of Agriculture and Technology (TUAT) , Japan, has developed a two-step method to more efficiently break down carbohydrates into their single sugar components, ...

Motor enzyme protects genome through several mechanisms

A helicase, Pfh1, can thanks to several different mechanisms protect the genome from DNA obstacles and damages associated with cancer. This is shown in a new doctoral thesis at Umeå University, Sweden.

AI heralds new frontiers for predicting enzyme activity

Researchers from the Departments of Chemistry and Engineering Science at the University of Oxford have found a general way of predicting enzyme activity. Enzymes are the protein catalysts that perform most of the key functions ...

A new tailor-made approach to biofuels

EU researchers designed and tested cell structures, cellulosomes, that help breakdown abundant biomass waste to produce value-added chemicals, such as advanced biofuels.

Integrated nanozymes for brain chemistry

Nanozymes are novel nanomaterials with enzyme mimicking activities, which are superior to natural enzymes and even conventional artificial enzymes. They have attracted considerable attention because they offer the possibility ...

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Enzyme catalysis

Enzyme catalysis is the catalysis of chemical reactions by specialized proteins known as enzymes. Catalysis of biochemical reactions in the cell is vital due to the very low reaction rates of the uncatalysed reactions.

The mechanism of enzyme catalysis is similar in principle to other types of chemical catalysis. By providing an alternative reaction route and by stabilizing intermediates the enzyme reduces the energy required to reach the highest energy transition state of the reaction. The reduction of activation energy (ΔG) increases the number of reactant molecules with enough energy to reach the activation energy and form the product.

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