New research by scientists at the University of Bristol has challenged one of the key axioms in biology - that enzymes need water to function. The breakthrough could eventually lead to the development of new industrial catalysts for processing biodiesel.
Enzymes are large biological molecules that catalyse thousands of different chemical reactions that are essential for all life, from converting food into energy, to controlling how our cells replicate DNA.
Optical microscopy images showing a mixture of the liquid enzyme (yellow material) with the solid substrate (black crystals) immediately after contact (left), and after incubation for 30 min at 50°C (right). The development of the yellow colouration arises from the lipase-catalysed formation the yellow product.
Credit: University of Bristol
Throughout this diverse range of biological environments in which enzymes perform their various roles, the only constant is an abundance of water.
However, new findings published today [6 October] in Nature Communications, show that water is not essential for enzymes to fulfil their biological role.
This discovery could pave the way for the development of new thermally robust industrial enzymes that could be utilised in harsh processing conditions, with applications ranging from detergent technologies to alternative energies via biofuel production.
Dr Adam Perriman and colleagues were able to circumvent the need for water by decorating the surface of the industrial enzyme lipase with long detergent molecules.
In principle, what the team created was an enzyme with an in-built ability to exist as a liquid without any solvent. What was astounding was that the solid chemical reactant, also known as the substrate, could be dissolved directly by the liquid enzyme, which then went on to catalyse the chemical reaction, and would continue to do so up to temperatures as high as 150° C.
Dr Perriman, from Bristol University's School of Cellular and Molecular Medicine, said: "From our preliminary experiments, we knew that the molecular structure of the lipase was still intact after the modifications, even at 150° C.
"However, we were surprised and delighted to discover that the catalytic activity of the enzyme was still present. The ability to rationally design a self-contained reactive biofluid, where one can literally sprinkle a solid substrate onto it, and then observe a chemical reaction, represents a real fundamental scientific advance."
'Enzyme activity in liquid lipase melts as a step towards solvent-free biology at 150°C' by Alex Brogan, Kamendra Sharma, Adam Perriman and Stephen Mann in Nature Communications.
Philippa Walker | Eurek Alert!
New risk factors for anxiety disorders
24.02.2017 | Julius-Maximilians-Universität Würzburg
Stingless bees have their nests protected by soldiers
24.02.2017 | Johannes Gutenberg-Universität Mainz
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
24.02.2017 | Life Sciences
24.02.2017 | Life Sciences
24.02.2017 | Trade Fair News