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How to protect biocatalysts from oxygen

How to protect biocatalysts from oxygen
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How to protect biocatalysts from oxygen

How to protect biocatalysts from oxygen
sciencedaily.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sciencedaily.com Daily Mail and Mail on Sunday newspapers.

A poison helps to understand H2-producing biocatalysts

In nature, enzymes termed hydrogenases are capable of producing molecular hydrogen (H2). Special types of these biocatalysts, so-called [FeFe]-hydrogenases, are extremely efficient and therefore o .

Hydrogen-producing enzyme protects itself against oxygen

 E-Mail An international research team from the Photobiotechnology Research Group at Ruhr-Universität Bochum (RUB) led by Professor Thomas Happe and the Laboratoire de Bioénergétique et Ingénierie des Protéines (CNRS) in Marseille has been able to get to the bottom of this unique feature. They describe the molecular mechanism in Nature Communications on 2 February 2021. Enzyme repeatedly survives the attack unharmed Representatives of the [FeFe]-hydrogenase enzyme group combine protons and electrons to form molecular hydrogen at particularly high turnover rates. Some of them even use sunlight as a primary energy source for this. However, even low oxygen concentrations quickly lead to the irreversible breakdown of the catalytic cofactor, called the H-cluster. This has so far been observed in all representatives of this enzyme group - except for CbA5H. This enzyme has a molecular mechanism that allows it to repeatedly survive the oxygen attack unharmed, says Thomas Happe.

Enzyme Twin with Biotechnological Potential: Green Algae Are Popular Objects in Biotechnology because They Have Hydrogen-Producing Enzymes – Advanced BioFuels USA

(Ruhr University Bochum) Green algae have two almost identical hydrogen-producing enzymes. One has been researched for decades, the other received little attention – until recently. Hydrogen-producing enzymes, so-called hydrogenases, could be a source of regenerative energy. The RUB photobiotechnology working group has now characterized a hydrogenase from the green alga  Chlamydomonas reinhardtii that has so far hardly been researched . Green algae have two almost identical hydrogenases. Although they differ in only one single amino acid, they have different properties, the Bochum team found. The researchers headed by Dr. Vera Engelbrecht and Prof. Dr. Thomas Happe in the “International Journal of Hydrogen Energy” on December 16, 2020.

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