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How a mushroom gets its glow

Biologists are working out the steps to fungal bioluminescence

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9:00am, April 27, 2017

MUSHROOM AFTER DARK  A naturally bioluminescent mushroom (Neonothopanus gardneri from Brazil’s palm forests shown) has a usefully easy-going enzyme that might inspire new glow-in-the-dark labels.

The enzyme that turns on the light for a glow-in-the-dark mushroom seems “promiscuous.” But in a good way.

Researchers have worked out new details of how two Neonothopanus fungi shine softly green at night. The team had earlier figured out that the basic starting material for bioluminescence in these fungi is a compound called hispidin, found in some other fungi as well as plants such as horsetails. Those plants don’t spontaneously give off light, but in the two Neonothopanus mushroom species, an enzyme rejiggers a form of hispidin into a compound that glows.

The enzyme that turns a fungus into a natural night-light isn’t that fussy as enzymes go, says Cassius V. Stevani of the University of São Paulo in Brazil. He and colleagues can tweak the compound that the enzyme normally reacts with

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