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Carotenoid oxygenases: cleave it or leave it
Giovanni Giuliano1, Salim Al-Babili, Johannes von Lintig
1ENEA, Casaccia Research Centre, Roma, Italy. giuliano@casaccia.enea.it
Trends in Plant Science
|April 25, 2003
Summary
Apocarotenoids, derived from carotenoids, are vital in animals and plants. A new enzyme family has been identified that oxidatively cleaves carotenoids, initiating their biosynthesis.
Area of Science:
- Biochemistry
- Molecular Biology
- Plant Science
Background:
- Apocarotenoids, derived from carotenoid cleavage, are crucial in both animals and plants.
- In animals, they function as retinoids (vitamins, visual pigments, signaling molecules).
- In plants, apocarotenoids serve as hormones, pigments, flavors, aromas, and defense compounds.
Purpose of the Study:
- To characterize a novel family of enzymes involved in carotenoid biosynthesis.
- To understand the initial oxidative cleavage step of carotenoids.
Main Methods:
- Enzyme characterization
- Biochemical assays
- Analysis of carotenoid cleavage
Main Results:
- A novel family of non-heme iron oxygenases capable of cleaving carotenoids was identified.
- These enzymes can cleave various carotenoids at different positions.
- The characterization provides insights into the initial steps of apocarotenoid biosynthesis.
Conclusions:
- The newly characterized enzyme family plays a key role in initiating apocarotenoid biosynthesis.
- This discovery advances our understanding of the diverse biological functions of apocarotenoids.