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BIO FUEL
Yeast cell factories make gas, jet fuel alternatives
by Amy Wallace
Washington (UPI) Mar 8, 2017


Researchers at Chalmers University of Technology in Sweden are using fatty acid synthase, or FAS, to produce sustainable alternatives to petrol and jet fuel.

The team successfully developed a new method using yeast cell factories to modify the FAS enzyme to create new sustainable chemical alternative products.

"This enzyme normally synthesizes long chain fatty acids, but we have now modified it into synthesizing medium chain fatty acids and methyl ketones -- chemicals that are components in currently used transportation fuels," Zhiwei Zhu, a post-doctoral student at Chalmers, said in a press release. "In other words: We are now able to produce [gasoline] and jet fuel alternatives in yeast cell factories, and this has never been done before."

Scientists have tried unsuccessfully over the years to modify FAS, which was first described by Nobel Prize winner Feodor Lynen.

"We did not expect this," Zhu said. "Actually, it was thought by the scientific community that this rigid enzyme was not readily amenable to manipulation. We first tried to change this fatty acid synthase by replacing one of its acyl carrier protein domains with a foreign enzyme to modify its properties and, surprisingly, it worked. Then we implemented such modification in other fungal fatty acid synthases and found this approach versatile."

The research was published in the journal Nature Chemical Biology.

BIO FUEL
New polymer additive could revolutionize plastics recycling
Ithaca NY (SPX) Feb 28, 2017
When Geoffrey Coates, a professor of chemistry and chemical biology at Cornell University, gives a talk about plastics and recycling, he usually opens with this question: What percentage of the 78 million tons of plastic used for packaging - for example, a 2-liter bottle or a take-out food container - actually gets recycled and re-used in a similar way? The answer, just 2 percent. Sadly, n ... read more

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