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Mushroom Fuel on the Way?

Friday December 2, 2005

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New research could move Shiitake mushrooms out of your kitchen and into your gas tank.

These fungi, which some people consider a delicacy, grow on fallen logs in the forest. The mushrooms digest the wood and turn it into sugars that they use for food.

Now scientists with the USDA's Agricultural Research Service are investigating whether this technique could be used to produce fuel.

The researchers have discovered and copied the Shiitake gene, Xyn11A, which gives the mushroom the ability to produce the enzyme xylanase, which dissolves wood into sugar. Now that the researchers have isolated the gene, they are looking into whether it can be used to produce vats of the enzyme for digesting rice hulls or other harvest leftovers into sugars that could be used for making ethanol or other fuel types.

Currently, these scientists are experimenting transferring the gene into yeast, in which they have already produced xylanase. The next step will be to modify the gene so the yeast can produce greater amounts of the enzyme in less time. This research was published earlier this year in Protein Journal.

--Bjorn Carey

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Credit: Scott Bauer/USDA

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