Characterization of a novel carotenoid cleavage dioxygenase from plants.

  title={Characterization of a novel carotenoid cleavage dioxygenase from plants.},
  author={Steven H. Schwartz and Xiaoqiong Qin and Jan A. D. Zeevaart},
  journal={The Journal of biological chemistry},
  volume={276 27},
The plant hormone abscisic acid is derived from the oxidative cleavage of a carotenoid precursor. Enzymes that catalyze this carotenoid cleavage reaction, nine-cis epoxy-carotenoid dioxygenases, have been identified in several plant species. Similar proteins, whose functions are not yet known, are present in diverse organisms. A putative cleavage enzyme from Arabidopsis thaliana contains several highly conserved motifs found in other carotenoid cleavage enzymes. However, the overall homology… CONTINUE READING
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