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223 Current news about the topic enzymes

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"Molecular scissors" for plastic waste

15-Apr-2019

A research team from the University of Greifswald and Helmholtz-Zentrum-Berlin (HZB) has solved the molecular structure of the important enzyme MHETase at BESSY II. MHETase was discovered in bacteria and together with a second enzyme - PETase - is able to break down the widely used plastic PET ...

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Optimized Binding Cavity

Directed evolution of a designer enzyme with an unnatural catalytic amino acid

05-Feb-2019

The impressively high conversion rates of natural enzymes partly result from increasing the catalytic activity of a selected few amino acid side chains through precise positioning within the protein binding cavity. Scientists have now demonstrated that such fine-tuning is also possible for ...

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Next step on the path towards an efficient biofuel cell

Two concepts combined making system as efficient as precious metal catalysts

16-Nov-2018

Fuel cells that work with the enzyme hydrogenase are, in principle, just as efficient as those that contain the expensive precious metal platinum as a catalyst. However, the enzymes need an aqueous environment, which makes it difficult for the starting material for the reaction – hydrogen – to ...

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Fully identified: The pathway of protons

New findings pave the way for chemical reproduction of hydrogen-producing enzymes

13-Nov-2018

The question how certain algal enzymes accomplish the high proton transfer rate for hydrogen production had in the past been subject to speculation. Dr. Martin Winkler, Dr. Jifu Duan, Professor Eckhard Hofmann and Professor Thomas Happe from Ruhr-Universität Bochum (RUB), together with colleagues ...

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This bacterium gets paid in gold

Harvesting solar fuels through a bacterium's unusual appetite for gold

11-Oct-2018

A bacterium named Moorella thermoacetica won't work for free. But UC Berkeley researchers have figured out it has an appetite for gold. And in exchange for this special treat, the bacterium has revealed a more efficient path to producing solar fuels through artificial photosynthesis. M. ...

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Artificial enzymes convert solar energy into hydrogen gas

08-Oct-2018

In a new scientific article, researchers at Uppsala University describe how, using a completely new method, they have synthesised an artificial enzyme that functions in the metabolism of living cells. These enzymes can utilize the cell's own energy, and thereby enable hydrogen gas to be produced ...

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Nobel Prize for Chemistry 2018 announced

Appreciation of the research in directed evolution and manipulation of enzymes and antibodies

04-Oct-2018

The researchers Frances H. Arnold and George P. Smith and Gregory P. Winter were announced as this year's winners of the Nobel Prize for Chemistry. Their achievements in the directed evolution in enzymes and the use of phage-display to produce antibodies was groundbreaking and worthy of the Nobel ...

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Bio solar cell produces hydrogen

Modular character allows multiple applications

27-Sep-2018

An international team of researchers has combined molecular building blocks from plants and microorganisms in a bio solar cell so that they could use light energy to directly produce hydrogen. This combination does not occur like this in nature: although plants can use light energy to convert ...

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Catalysts combination opens doors to making useful compounds

17-Aug-2018

Researchers have developed a new method that aids in the process of making valuable compounds by using a unique combination of catalysts. Huimin Zhao, Professor of Chemical and Biomolecular Engineering and leader of the Biosystems Design research theme at the Carl R. Woese Institute for Genomic ...

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Two new ways to fluorinated structures

Chemo-enzymatic synthesis of fluorinated antibiotics

07-Aug-2018

Fluorinated structures make up more than 20 percent of modern drugs, but benign and fast fluorination schemes are scarce. In a study scientists have now combined dynamic kinetic resolution and nucleophilic fluorination for the asymmetric synthesis of florfenicol, a veterinary antibiotic. After ...

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